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planetary

planetary

planetary Sentence Examples

  • Today, all of our eggs are in a lone planetary basket, Earth.

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  • Ficino was, moreover, a firm believer in planetary influences.

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  • He'd known it would fail, but the elders of the Planetary Council had called in their last favor.

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  • It is represented by the ratio of a number containing about a hundred and sixty figures to unity, and so we are at once forced to the conclusion that this remarkable feature of the planetary motions must have some physical explanation.

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  • The planetary theory and other particular dynamical problems likewise occupied his attention from time to time.

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  • Amongst the most important of his works not already mentioned may be named the following: - Mathematical Tracts (1826) on the Lunar Theory, Figure of the Earth, Precession and Nutation, and Calculus of Variations, to which, in the second edition of 1828, were added tracts on the Planetary Theory and the Undulatory Theory of Light; Experiments on Iron-built Ships, instituted for the purpose of discovering a correction for the deviation of the Compass produced by the Iron of the Ships (1839); On the Theoretical Explanation of an apparent new Polarity in Light (1840); Tides and Waves (1842).

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  • The application of photography to exact astronomy has created the necessity for new forms of apparatus to measure the relative positions of stellar and planetary images on photographic plates, and the relative positions of lines in photographic spectra.

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  • The discordance of their results incited Laplace to a searching examination of the whole subject of planetary perturbations, and his maiden effort was rewarded with a discovery which constituted, when developed and completely demonstrated by his own further labours and those of his illustrious rival Lagrange, the most important advance made in physical astronomy since the time of Newton.

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  • It banished the spirits and genii, to which even Kepler had assigned the guardianship of the planetary movements; and, if it supposes the globular particles of the envelope to be the active force in carrying the earth round the sun, we may remember that Newton himself assumed an aether for somewhat similar purposes.

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  • It banished the spirits and genii, to which even Kepler had assigned the guardianship of the planetary movements; and, if it supposes the globular particles of the envelope to be the active force in carrying the earth round the sun, we may remember that Newton himself assumed an aether for somewhat similar purposes.

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  • Of the names of the planets Estera (Ishtar Venus, also called Ruha d'Qudsha, "holy spirit"), Enba (Nebo, Mercury), Sin (moon), Kewan (Saturn), Bil (Jupiter), and Nirig (Nirgal, Mars) reveal their Babylonian origin; Il or Il Il, the sun, is also known as Kadush and Adunay (the Adonai of the Old Testament); as lord of the planetary spirits his place is in the midst of them; they are the source of all temptation and evil amongst men.

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  • Of the names of the planets Estera (Ishtar Venus, also called Ruha d'Qudsha, "holy spirit"), Enba (Nebo, Mercury), Sin (moon), Kewan (Saturn), Bil (Jupiter), and Nirig (Nirgal, Mars) reveal their Babylonian origin; Il or Il Il, the sun, is also known as Kadush and Adunay (the Adonai of the Old Testament); as lord of the planetary spirits his place is in the midst of them; they are the source of all temptation and evil amongst men.

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  • From this the distance of the sun can be at once determined by a fundamental equation of planetary motion.

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  • He quotes as an instance that Newton in this way added to the planetary appearances contained in Kepler's laws the gravitation of the planets to the sun, as a notion of causality not contained in the appearances, and thus discovered that gravitation is the cause of the appearances.

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  • That it formed the starting-point, and largely prescribed the course of thought on the subject of planetary origin is due to the simplicity of its assumptions, and the clearness of the mechanical principles involved, rather than to any cogent evidence of its truth.

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  • Next, dependent on the inclination of the earths axis, is the division of the planetary year into the terrestrial seasons, with winter and summer changes of temperature, wind-strength and precipitation: these seasonal changes are not of the restrained measure that is characteristic of the oceanic southern temperate zone, but of the exaggerated measure appropriate to the continental interruptions of ~the northern land-and-water zone, to which the term temperate is so generally inapplicable.

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  • The Planetary Council, his second-in-command, even his sister, had paraded women through his home every time he returned from a battle.

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  • The investigation that brought about this result was probably the most laborious that had been made up to Airy's time in planetary theory, and represented the first specific improvement in the solar tables effected in England since the establishment of the theory of gravitation.

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  • Though these objects only become visible in the atmosphere they are extra-terrestrial planetary bodies, and properly belong to the domain of astronomy.

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  • He clearly perceived the significant analogy between terrestrial gravity and the force exerted in the solar system, and by the ingenious device of a circular pendulum illustrated the composite character of the planetary movements.

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  • The genesis of Mandaeis.m and the older gnosis from the old and elaborate BabylonioChaldaean religion is clearly seen also in the fact that the names of the old pantheon (as for example those of the planetary divinities) are retained, but their holders degraded to the position of demons - a conclusion confirmed by the fact that the Mandaeans, like the allied Ophites, Peratae and Manichaeans, certainly have their original seat in Mesopotamia and Babylonia.

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  • vii., 1776), Laplace announced his celebrated conclusion of the invariability of planetary mean motions, carrying the proof as far as the cubes of the eccentricities and inclinations.

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  • 88), although now discarded, received countenance from the finding of Juno by Harding, and of Vesta by himself, in the precise regions of Cetus and Virgo where the nodes of such supposed planetary fragments should be situated.

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  • period the Babylonian religion centred in the adoration of the seven planetary deities.

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  • We must also reject the theory that this degradation of the planetary deities into daemons is due to the influence of Hebrew monotheism, for almost all the Gnostic sects take up a definitely hostile attitude towards the Jewish religion, and almost always the highest divinity among the Seven is actually the creator-God of the, Old Testament.

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  • vii., 1776), Laplace announced his celebrated conclusion of the invariability of planetary mean motions, carrying the proof as far as the cubes of the eccentricities and inclinations.

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  • The net effect of the surrounding land is, in fact, to reverse the seasonal variations of the planetary circulation, but without destroying its type.

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  • Propitiatory abstinences were recommended when the natal asterism was menaced by unfavourable planetary conjunctions.

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  • The Brains set up the Planetary Council-- the alien version of the United Nations-- several generations before to mediate between the warring planets within the Five Galaxies.

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  • By measurements giving the position of Mars among Planetary the neighbouring stars in the morning and evening, Parallaxes.

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  • The planets in question appeared in the telescope as star-like objects which could be compared with the stars with much greater accuracy than a planetary disk like that of Mars, the apparent form of which was changed by its varying phase, due to the different directions of the sun's illumination.

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  • The calculus of variations lay undeveloped in Euler's mode of treating isoperimetrical problems. The fruitful method, again, of the variation of elements was introduced by Euler, but adopted and perfected by Lagrange, who first recognized its supreme importance to the analytical investigation of the planetary movements.

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  • His determination 2 of maximum and minimum values for the slowly varying planetary eccentricities was the earliest attempt to deal with the problem.

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  • But the form in which the whole is set forth is Oriental, and it must be carefully noted that the Mithras mysteries, so closely connected with the Persian religion, are acquainted with this doctrine of the ascent of the soul through the planetary spheres (Origen, Contra Celsum, vi.

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  • The seven powers which create and rule the world are without doubt the seven planetary deities of the later Babylonian religion.

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  • without astonishment," even to himself, regard being had to the great generality of the differential equations, he reached a result so wide as to include, as a particular case, the solution of the planetary problem recently obtained by him.

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  • The isothermal lines, in fact, suggest that in the vast area of the Pacific something corresponding to the " planetary circulation " is established, further investigation of which may be of extreme value in relation to current inquiries concerning the upper air.

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  • without astonishment," even to himself, regard being had to the great generality of the differential equations, he reached a result so wide as to include, as a particular case, the solution of the planetary problem recently obtained by him.

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  • But the form in which the whole is set forth is Oriental, and it must be carefully noted that the Mithras mysteries, so closely connected with the Persian religion, are acquainted with this doctrine of the ascent of the soul through the planetary spheres (Origen, Contra Celsum, vi.

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  • The attention devoted to the matter soon elucidated the phenomena of meteors, and proved them to be small planetary bodies, practically infinite in numbers and illimitable in the extent and variety of their orbits.

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  • In the appended treatise Sur la Cause de la pesanteur, he rejected gravitation as a universal quality of matter, although admitting the Newtonian theory of the planetary revolutions.

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  • It was followed by a series of profound investigations, in which Lagrange and Laplace alternately surpassed and supplemented each other in assigning limits of variation to the several elements of the planetary orbits.

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  • In the South Atlantic the narrow land surfaces of Africa and South America produce comparatively little effect in disturbing the normal planetary circulation.

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  • 97 Ursae majoris is of the planetary type; the earl of Rosse observed two spiral condensations turning in opposite directions, - hence its name, - the " Owl nebula."

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  • 2 There can scarcely be any doubt as to the origin of these seven (five) powers; they are the seven planetary divinities, the sun, moon and five planets.

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  • Kepler (1571-1630) was led by his study of the planetary motions to reject this method of statement as inadequate, and it is in fact incapable of giving a complete representation of the motions in question.

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  • The sacredness of the number seven is based on the seven planetary deities to whom each day of the week was respectively dedicated, i.e.

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  • parts I and 2; and in the case of planetary parallax in the Mem.

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  • The sacredness of the number seven is based on the seven planetary deities to whom each day of the week was respectively dedicated, i.e.

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  • The first, for a memoir on the construction of a clepsydra for measuring time exactly at sea, he gained at the age of twenty-four; the second, for one on the physical cause of the inclination of the planetary orbits, he divided with his father; and the third, for a communication on the tides, he shared with Euler, Colin Maclaurin and another competitor.

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  • The warmed air of summer produces an area of low pressure in the west-central United States, which interrupts the belt of high pressure that planetary conditions alone would form around the earth about latitude 30; hence there is a tendency of the summer winds to blow inward from the northern Pacific over the Cordilleras toward the continental centre, and from the trades of the torrid Atlantic up the Mississippi Valley; conversely in winter time, the cold air over the lands produces a large area of high pressure from which the winds tend to flow outward; thus repelling the westerly winds of the northern Pacific and greatly intensifying the outflow southward to the Gulf of Mexico and eastward to the Atlantic. As a result of these seasonal alternations of temperature and pressure there is something of a monsoon tendency developed in the winds of the Mississippi Valley, southerly infiowing winds prevailing in summer and northerly outfiowing winds in winter; but the general tendency to inflow and outflow is greatly modified by the relief of the lands, to which we next turn.

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  • He, moreover, sought in the events of his own life a verification of the theory of planetary influences; and it is to this practice that we owe the summary record of each year's occurrences which, continued almost to his death, affords for his biography a slight but sure foundation.

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  • This collective grouping of the seven (five) planetary divinities is derived from the late Babylonian religion, which can definitely be indicated as the home of these ideas (Zimmern, Keilinschriften in dem alien Testament, ii.

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  • For in the Babylonian religion the planetary constellations are reckoned as the supreme deities.

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  • This extraordinary production is memorable as having announced the discovery of the "third law" - that of the sesquiplicate ratio between the planetary periods and distances.

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  • But the fantastic relations imagined by him of planetary movements and distances to musical intervals and geometrical constructions seemed to himself discoveries no less admirable than the achievements which have secured his lasting fame.

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  • His demonstration that the planes of all the planetary orbits pass through the centre of the sun, coupled with his clear recognition of the sun as the moving power of the system, entitles him to rank as the founder of physical astronomy.

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  • He was several times a successful competitor for the prizes given by the Academy of Sciences of Paris; the subjects of his essays being: - the laws of motion (Discours sur les lois de la communication du mouvement, 1727), the elliptical orbits of the planets, and the inclinations of the planetary orbits (Essai d'une nouvelle physique celeste, 1735).

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  • Thus in 1864 the spectroscope yielded him evidence that planetary and irregular nebulae consist of luminous gas - a conclusion tending to support the nebular hypothesis of the origin of stars and planets by condensation from glowing masses of fluid material.

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  • Beyond this sublunary world extend the planetary spheres, out to the sphere of the Fixed Stars.

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  • Some planetary energies also conflict with Taurus' grounded energy.

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  • With this end in view he expounded to the Berlin academy in 1849 a mode of determining an elliptic orbit from three observations, and communicated to that body in 1851 a new method of calculating planetary perturbations by means of rectangular coordinates (republished in W.

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  • The general coincidence of the Sabbath or seventh day with the easily recognized first quarter and full moon established its sacred character as lunar as well as planetary.

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  • The demiurge of the Mandaeans, and corresponding to the Ialdabaoth of the Ophites, he at the instance of his father frames the earth and men - according to some passages in conjunction with the seven bad planetary spirits.

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  • It may be added that he first examined the conditions of stability of the system formed by Saturn's rings, pointed out the necessity for their rotation, and fixed for it a period (Io h 33 m) virtually identical with that established by the observations of Herschel; that he detected the existence in the solar system of an invariable plane such that the sum of the products of the planetary masses by the projections upon it of the areas described by their radii vectores in a given time is a maximum; and made notable advances in the theory of astronomical refraction (Mec. cel.

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  • In 1609 and 1619 Kepler published his new laws of planetary motion, which were subsequently shown by Newton to agree with the results obtained by experiment for the motion of terrestrial bodies.

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  • As a law of acceleration of the planets relatively to the sun, its approximate agreement with Kepler's third law of planetary motion follows readily from a consideration of the character of the acceleration of a point moving uniformly in a circle.

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  • Some years later he succeeded in showing that Kepler's elliptic orbit for planetary motion agreed with the assumed law of attraction; he also completed the co-ordination with terrestrial gravity by his investigation of the attractions of homogeneous spherical bodies.

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  • This is not inconsistent with the law of gravitation, for such estimates as have been made of planetary perturbations due to stars give results which are insignificant in comparison with quantities at present measurable.

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  • Pursuing the investigations of Laplace, he demonstrated with greater rigour the stability of the solar system, and calculated the limits within which the eccentricities and inclinations of the planetary orbits vary.

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  • Recalled once more, by the summons of Arago, to planetary studies, he was this time invited to turn his attention to Uranus.

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  • This was nothing less than the complete revision of the planetary theories, followed by a laborious comparison of results with the most authentic observations, and the construction of tables representing the movements thus corrected.

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  • His planetary and solar tables were adopted by the Nautical Almanac, as well as by the Connaissance des temps.

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  • Before leaving it for Queen's College, Oxford, in 1673, he had observed the change in the variation of the compass, and at the age of nineteen, he supplied a new and improved method of determining the elements of the planetary orbits (Phil.

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  • and very delicate planetary or lunar details.

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  • In this connexion it may be noted that the spectrum of Nova Persei, after passing through a stage in which it resembled that of a planetary nebula, has now become of the Wolf-Rayet type.

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  • when the more general law of gravitation is shown to include the less general laws of planetary gravitation.

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  • Newton did indeed first show synthetically what kind of motions by mechanical laws have their ground in a centripetal force varying inversely as the square of the distance (all P is M); but his next step was, not to deduce synthetically the planetary motions, but to make a new start from the planetary motions as facts established by Kepler's laws and as examples of the kind of motions in question (all S is P); and then, by combining these two premises, one mechanical and the other astronomical, he analytically deduced that these facts of planetary motion have their ground in a centripetal force varying inversely as the squares of the distances of the planets from the sun (all S is M).

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  • This done, as the major is convertible, the analytic order - P-M, S-P, S-M - was easily inverted into the synthetic order - M-P, S-M, S-P; and in this progressive order the deduction as now taught begins with the centripetal force of the sun as real ground, and deduces the facts of planetary motion as consequences.

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  • from the consequential facts of planetary motion to their real ground, i.e.

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  • It is noticeable that Wundt quotes Newton's discovery of the centripetal force of the planets to the sun as an instance of this supposed hypothetical, analytic, inductive method; as if Newton's analysis were a hypothesis of the centripetal force to the sun, a deduction of the given facts of planetary motion, and a verification of the hypothesis by the given facts, and as if such a process of hypothetical deduction could be identical with either analysis or induction.

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  • Really, we first experience that particular causes have particular effects; then induce that causes similar to those have effects similar to these; finally, deduce that when a particular cause of the kind occurs it has a particular effect of the kind by synthetic deduction, and that when a particular effect of the kind occurs it has a particular cause of the kind by analytic deduction with a convertible premise, as when Newton from planetary motions, like terrestrial motions, analytically deduced a centripetal force to the sun like centripetal forces to the earth.

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  • relation to the stars; in the planetary theory the origin is trans - ferred to the sun, and afterwards to the mass-centre of thf solar system; and so on.

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  • The formation of the tables of a planet has been described by Cayley as " the culminating achievement of astronomy," but the gigantic task which Newcomb laid out for himself, and which he carried on for more than twenty years, was the building up, on an absolutely homogeneous basis, of the theory and tables of the whole planetary system.

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  • Since the epoch of Alexander the Great IIarran had been a famous centre of pagan and Hellenistic culture; its people were Syrian heathens, star-worshippers versed in astrology and magic. In their temples the planetary powers were propitiated by blood-offerings, and it is probable that human victims were occasionally sacrificed even as late as the 9th century of our era.

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  • From the astronomers the Stoics borrowed their picture of the universe - a plenum in the form of a series of layers or concentric rings, first the elements, then the planetary and stellar spheres, massed round the earth as centre - a picture which dominated the imagination of men from the days of Eudoxus down to those of Dante or even Copernicus.

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  • we have memoirs relating to the proof of the theorem that every numerical equation has a real or imaginary root, the memoir on the Hypergeometric Series, that on Interpolation, and the memoir Determinatio attractionis - in which a planetary mass is considered as distributed over its orbit according to the time in which each portion of the orbit is described, and the question (having an implied reference to the theory of secular perturbations) is to find the attraction of such a ring.

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  • He made some preliminary use of these expressions in 1817, in a paper on Kepler's Problem (Transactions Berlin Academy, 1816-1817, p. 49), and fully developed them seven years later, for the purposes of a research into planetary perturbations (Ibid.

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  • On the 4th and 12th of August, as afterwards appeared, the planet was actually observed; but owing to the want of a proper star-map it was not then recognized as planetary.

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  • Among Whewell's other works - too numerous to mention - reference must be made to writings popular in their day, such as the Bridgewater Treatise on Astronomy (1833), and the essay, Of the Plurality of Worlds (1854), in which he argued against the probability of planetary life, and also to the Platonic Dialogues for English Readers (1859-1861), to the Lectures on the History of Moral Philosophy in England (1852), to the essay, Of a Liberal Education in General, with particular reference to the Leading Studies of the University of Cambridge (1845), to the important edition and abridged translation of Grotius, De jure belli et pacis (1853), and to the edition of the Mathematical Works of Isaac Barrow (1860).

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  • The science had its origin in the demonstration by Sir Isaac Newton that Kepler's three laws of planetary motion, and the law of gravitation, in the case of two bodies, could be mutually derived from each other.

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  • If we conceive a pole to each of these orbits, determined by the points in which lines perpendicular to their planes intersect the celestial sphere, the pole of the satellite orbit will revolve around the pole of the planetary orbit precisely as the pole of the earth does around the pole of the ecliptic, the inclination of the two orbits remaining unchanged.

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  • He attempted no detailed discussion of planetary theory; but his catalogue of 1 080 stars, divided into six classes of brightness, or " magnitudes," is one of the finest monuments of antique astronomy.

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  • and cast horoscopes; here Tobit ben Korra (836 901) developed his long unquestioned, yet misleading theory of the " trepidation " of the equinoxes; Abd-ar-rahman al-Safi 9 0 3-9 86) revised at first hand the catalogue of Ptolemy; 3 and Abulwefa (939-998), like al-Safi, a native of Persia, made continuous planetary observations, but did not (as alleged by L.

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  • By this means, the planetary " retrogradations " were explained as simple perspective effects due to the combination of the earth's revolutions with those of her sister orbs.

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  • Nor was it feasible, on this showing, to place the sun at the true centre of any of the planetary orbits; so that his ruling position in the midst of them was illusory.

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  • He aimed at finding out the cause as well as the mode of the planetary revolutions; and his demonstration that the planes in which they are described all pass through the sun was an important preliminary to a physical explanation of them.

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  • Yet they were never assimilated by Kepler; while, on the other hand, the laws of planetary circulation he had enounced were strangely ignored by Galileo.

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  • Gravitation was thus shown to be the sole influence governing the movements of planets and satellites; the figure of the rotating earth was successfully explained by its action on the minuter particles of matter; tides and the precession of the equinoxes proved amenable to reasonings based on the same principle; and it satisfactorily accounted as well for some of the chief lunar and planetary inequalities.

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  • The subject of planetary perturbations was next attacked.

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  • The proper share of each in bringing about this memorable result is not easy to apportion, since they freely imparted and profited by one another's advances and improvements; it need only be said that the fundamental proposition of the invariability of the planetary major axes laid down with restrictions by Laplace in 1773, was finally established by Lagrange in 1776; while Laplace in 1784 proved the subsistence of such a relation between the eccentricities of the planetary orbits on the one hand, and their inclinations on the other, that an increase of either element could, in any single case, proceed only to a very small extent.

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  • Leverrier undertook in 1839, and concluded in 1876, the formidable task of revising all the planetary theories and constructing from them improved tables.

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  • This was the first planetary transit observed.

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  • Among the fruits of the strenuous career of Nicolas Louis de Lacaille were tables of the sun, in which terms depending upon planetary perturbations were, for the first time, introduced (1758); an extended acquaintance with the southern heavens; and a determination of the moon's parallax from observations made at opposite extremities of an arc of the meridian 85' in length.

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  • Nebular chemistry was initiated by the same investigator when, on the 29th of August 1864, he observed the bright-line spectrum of a planetary nebula in Draco.

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  • of the Planetary Systems (1906); G.

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  • Thus a new branch of the lunar theory was suggested - the determination by theory of the effect of planetary action.

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  • In his Dialogo dei massimi sistemi, printed not less than thirteen years after the last of the three laws had been given to the world, the epicycles by which Copernicus, adhering to the ancient postulate of uniform circular motion, had endeavoured to reduce to theory the irregularities of the planetary movements, were neither expressly adopted nor expressly rejected; and the conclusion seems inevitable that this grave defection from the cause of progress was due to his perhaps unconscious reluctance to accept discoveries which he had not originated.

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  • Of his two capital errors, regarding respectively the theory of the tides and the nature of comets, the first was insidiously recommended to him by his passionate desire to find a physical confirmation of the earth's double motion; the second was adopted for the purpose of rebutting an anti-Copernican argument founded on the planetary analogies of those erratic subjects of the sun.

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  • The theory of the ecliptic as representing the course of the sun through the year, divided among twelve constellations with a measurement of 30 to each division, is also of Babylonian origin, as has now been definitely proved; but it does not appear to have been perfected until after the fall of the Babylonian empire in 539 B.C. Similarly, the other accomplishments of Babylonian astronomers, such as their system or rather systems of moon calculations and the drawing up of planetary tablets, belong to this late period, so that the golden age of Babylonian astronomy belongs not to the remote past, as was until recently supposed, but to the Seleucid period, i.e.

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  • Diseases and distrubances of the ordinary functions of the organs were attributed to the influence of planets or explained as due to conditions observed in a constellation or in the position of a star; and an interesting survival of this bond between astrology and medicine is to be seen in the use up to the present time of the sign of Jupiter 4., which still heads medicinal prescriptions, while, on the other hand, the influence of planetary lore appears in the assignment of the days of the week to the planets, beginning with Sunday, assigned to the sun, and ending with Saturday, the day of Saturn.

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  • Chaucer wrote a treatise on the astrolabe; Milton constantly refers to planetary influences; in Shakespeare's King Lear, Gloucester and Edmund represent respectively the old and the new faith.

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  • The hypothesis of the original nebular condition of the system, with the consequent explanation of the great phenomena of planetary formations and movements of the satellites and rings, is unquestionably to be assigned to Kant.

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  • The Planetary Council, his second-in-command, even his sister, had paraded women through his home every time he returned from a battle.

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  • It was the smallest moon in the Five Galaxies, the section of space under the influence of the meddling Planetary Council.

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  • Without her, the rivers are dry, the women are barren, and the mines produce no ore," A'Ran replied, then added pointedly, "And the Planetary Council interferes with everything you try to do to reclaim what's rightfully yours."

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  • All the spaceships, computers, and weapons within the Five Galaxies were made from ore from Anshan mines-- even the swords, the only weapons sanctioned by the Planetary Council as fair and appropriate for man-to-man combat.

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  • The Brains set up the Planetary Council-- the alien version of the United Nations-- several generations before to mediate between the warring planets within the Five Galaxies.

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  • He'd known it would fail, but the elders of the Planetary Council had called in their last favor.

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  • From the area of the planet, semi-major axis and amount of reflected light, the planetary albedos can be derived.

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  • It is also helpful where your energy fields are being affected by negative planetary alignments.

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  • A*C*G maps are tools to describe the effect of planetary angularity upon the earth for a given moment of time.

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  • The semimajor axis of a planetary orbit is also the average distance from the planet to its primary.

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  • The ultimate aim of terraforming is to create an uncontained planetary biosphere like Earth i.e. one that would be hospitable for human beings.

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  • coalescet the whole thing is a whirling mass of gas and dust, gradually coalescing into new stars and perhaps new planetary systems.

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  • Take a look at this question that was asked previously about the upcoming planetary conjunction.

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  • In ancient cosmology, the planetary spheres ascended from Earth to Heaven like the rungs of a ladder.

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  • countless billions of stars like our Sun - many of which will have planetary systems.

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  • They were visited by the Confederation and became desirous of staying in order to aid the planetary consciousness.

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  • Take on a whistle-stop tour of the history of planetary exploration.

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  • facile to say that these planetary movements are governed by gravity.

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  • I have a set of " planetary glyphs, " tokens inscribed with various planetary etchings.

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  • kinematics of the planetary nebula Hubble 12: What happens to stars at the end of their lives depends on their mass.

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  • Studying planetary magnetic fields enables us to explore what is happening deep inside the planets.

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  • Music Of The Spheres: January 2004 The Universe has its own heavenly sounds, such as pulsars, planetary magnetospheres and solar winds.

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  • The main purpose of Book I is to explain Keplers laws of planetary motion, so lets remind ourselves of these.

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  • The expended gas frequently forms an impressive display called a planetary nebula that fades gradually over thousand of years.

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  • Our own Sun may eject a similar planetary nebula some 6 billion years from now.

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  • Features of Aquarius: Aquarius contains the famous planetary nebula Saturn Nebula.

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  • The semimajor axis of a planetary orbit is also the average distance from the planet to its primary.

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  • There is now a need to make such sensors smaller and lighter to remain competitive for space-based solar-terrestrial physics and planetary science.

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  • The tradition of planetary physiognomy is alive and well in the present day ).

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  • Mark will be presenting his research on space weathering, a process that modifies planetary and asteroid surfaces over time.

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  • It will have planetary pegs and will be wired like a stereo Stratocaster.

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  • This is an ideal telescope for high power planetary viewing as well as imaging.

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  • planetary nebula some 6 billion years from now.

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  • Players can fly much closer to planetary bodies; where space stations can hang in low planetary orbits.

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  • planetary rulerships lying within the twelvefold division of the zodiac.

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  • planetary ruler of Gemini is Mercury, representing the sign's use of the mind.

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  • planetary motion using geometrical methods.

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  • planetary rulership over signs fall into this?

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  • The expended gas frequently forms an impressive display called a planetary nebula that fades gradually over thousand of years.

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  • This process often produces a planetary nebula, with the white dwarf star at its center.

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  • It continues to lose mass via a stellar wind as it dies, forming a planetary nebula.

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  • In other planetary nebulae, like the Ring Nebula (NGC 6720 ), we view the donut from the top.

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  • VLA observations of V4334 Sgr (Sakurai's Object) provided images of the associated faint planetary nebula.

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  • Bipolar lobes many planetary nebulae have a pronounced spreading along an axis.

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  • In the ensuing 70 years, only three more planetary nebulae have been discovered in globular clusters.

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  • We also have to add in the planetary precession, which decreases the RA by a quantity a, during the same time interval.

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  • Planetary nebulae, supernovae, stellar remnants - white dwarfs, neutron stars, black holes.

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  • To make this a little easier for new folks, here is the planetary rulers of your sun sign.

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  • However, suppose an alien civilization somehow finds a way to launch the aggressive colonization of other planetary systems while avoiding self-destruction.

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  • semimajor axis of a planetary orbit is also the average distance from the planet to its primary.

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  • Caltech have a Virtual Planetary Laboratory aimed at reproducing possible spectral signatures to help the Terrestrial Planet Finder program.

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  • As it passed through the planetary spheres, so it received a portion of each planet's nature.

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  • sublunary world extend the planetary spheres, out to the sphere of the Fixed Stars.

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  • The results will show how far planetary waves penetrate into the lower thermosphere under " direct " forcing.

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  • tittle of evidence that any planetary system save our own exists.

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  • A dearth of planetary transits in the direction of NGC 6940 (Hood et al.

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  • Fine-scale transient upwelling (from eddies, fronts and planetary waves) provides the dominant supply of nitrate.

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  • The application of photography to exact astronomy has created the necessity for new forms of apparatus to measure the relative positions of stellar and planetary images on photographic plates, and the relative positions of lines in photographic spectra.

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  • The Newtonian theory is an analysis of the elementary movements which in their combination determine the planetary orbits, and gives the formula of the proportions according to which they act.

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  • With this end in view he expounded to the Berlin academy in 1849 a mode of determining an elliptic orbit from three observations, and communicated to that body in 1851 a new method of calculating planetary perturbations by means of rectangular coordinates (republished in W.

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  • In the South Atlantic the narrow land surfaces of Africa and South America produce comparatively little effect in disturbing the normal planetary circulation.

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  • South of this anticyclone, from about the latitude of the Cape, we find the region where, on account of the uninterrupted sea surface right round the globe, the planetary circulation is developed to the greatest extent known; the pressure gradient is steep, and the region is swept continuously by strong westerly winds - the " roaring forties."

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  • The net effect of the surrounding land is, in fact, to reverse the seasonal variations of the planetary circulation, but without destroying its type.

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  • The investigation that brought about this result was probably the most laborious that had been made up to Airy's time in planetary theory, and represented the first specific improvement in the solar tables effected in England since the establishment of the theory of gravitation.

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  • The formidable undertaking of reducing the accumulated planetary observations made at Greenwich from 1750 to 1830 was already in progress under Airy's supervision when he became Astronomer Royal.

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  • Amongst the most important of his works not already mentioned may be named the following: - Mathematical Tracts (1826) on the Lunar Theory, Figure of the Earth, Precession and Nutation, and Calculus of Variations, to which, in the second edition of 1828, were added tracts on the Planetary Theory and the Undulatory Theory of Light; Experiments on Iron-built Ships, instituted for the purpose of discovering a correction for the deviation of the Compass produced by the Iron of the Ships (1839); On the Theoretical Explanation of an apparent new Polarity in Light (1840); Tides and Waves (1842).

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  • The seven powers which create and rule the world are without doubt the seven planetary deities of the later Babylonian religion.

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  • The general coincidence of the Sabbath or seventh day with the easily recognized first quarter and full moon established its sacred character as lunar as well as planetary.

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  • It is represented by the ratio of a number containing about a hundred and sixty figures to unity, and so we are at once forced to the conclusion that this remarkable feature of the planetary motions must have some physical explanation.

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  • The demiurge of the Mandaeans, and corresponding to the Ialdabaoth of the Ophites, he at the instance of his father frames the earth and men - according to some passages in conjunction with the seven bad planetary spirits.

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  • The genesis of Mandaeis.m and the older gnosis from the old and elaborate BabylonioChaldaean religion is clearly seen also in the fact that the names of the old pantheon (as for example those of the planetary divinities) are retained, but their holders degraded to the position of demons - a conclusion confirmed by the fact that the Mandaeans, like the allied Ophites, Peratae and Manichaeans, certainly have their original seat in Mesopotamia and Babylonia.

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  • Ficino was, moreover, a firm believer in planetary influences.

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  • In the appended treatise Sur la Cause de la pesanteur, he rejected gravitation as a universal quality of matter, although admitting the Newtonian theory of the planetary revolutions.

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  • From this the distance of the sun can be at once determined by a fundamental equation of planetary motion.

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  • By measurements giving the position of Mars among Planetary the neighbouring stars in the morning and evening, Parallaxes.

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  • The planets in question appeared in the telescope as star-like objects which could be compared with the stars with much greater accuracy than a planetary disk like that of Mars, the apparent form of which was changed by its varying phase, due to the different directions of the sun's illumination.

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  • The calculus of variations lay undeveloped in Euler's mode of treating isoperimetrical problems. The fruitful method, again, of the variation of elements was introduced by Euler, but adopted and perfected by Lagrange, who first recognized its supreme importance to the analytical investigation of the planetary movements.

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  • What may be called Lagrange's first period of research into planetary perturbations extended from 1774 to 1784 (see Astronomy: History).

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  • His determination 2 of maximum and minimum values for the slowly varying planetary eccentricities was the earliest attempt to deal with the problem.

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  • cvii.) and inscriptions preserve the knowledge that the mystic, sacratus, passed through seven degrees, which probably corresponded to the seven planetary spheres traversed by the soul in its progress to wisdom, perfect purity, and the abode of the blest: Corax, Raven, so named because the raven in Mithraic mythology was the servant of the Sun; Cryphius, Occult, a degree in the taking of which the mystic was perhaps hidden from others in the sanctuary by a veil, the removal of which was a solemn ceremonial; Miles, Soldier, signifying the holy warfare against evil in the service of the god; Leo, Lion, symbolic of the element of fire; Perses, Persian, clad in Asiatic costume, a reminiscence of the ancient origin of the religion; Heliodromus, Courier of the Sun, with whom Mithras was identified; Pater, Father, a degree bringing the mystic among those who had the general direction of the cult for the rest of their lives.

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  • The discordance of their results incited Laplace to a searching examination of the whole subject of planetary perturbations, and his maiden effort was rewarded with a discovery which constituted, when developed and completely demonstrated by his own further labours and those of his illustrious rival Lagrange, the most important advance made in physical astronomy since the time of Newton.

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  • It was followed by a series of profound investigations, in which Lagrange and Laplace alternately surpassed and supplemented each other in assigning limits of variation to the several elements of the planetary orbits.

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  • That it formed the starting-point, and largely prescribed the course of thought on the subject of planetary origin is due to the simplicity of its assumptions, and the clearness of the mechanical principles involved, rather than to any cogent evidence of its truth.

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  • It may be added that he first examined the conditions of stability of the system formed by Saturn's rings, pointed out the necessity for their rotation, and fixed for it a period (Io h 33 m) virtually identical with that established by the observations of Herschel; that he detected the existence in the solar system of an invariable plane such that the sum of the products of the planetary masses by the projections upon it of the areas described by their radii vectores in a given time is a maximum; and made notable advances in the theory of astronomical refraction (Mec. cel.

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  • Though these objects only become visible in the atmosphere they are extra-terrestrial planetary bodies, and properly belong to the domain of astronomy.

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  • The attention devoted to the matter soon elucidated the phenomena of meteors, and proved them to be small planetary bodies, practically infinite in numbers and illimitable in the extent and variety of their orbits.

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  • He was several times a successful competitor for the prizes given by the Academy of Sciences of Paris; the subjects of his essays being: - the laws of motion (Discours sur les lois de la communication du mouvement, 1727), the elliptical orbits of the planets, and the inclinations of the planetary orbits (Essai d'une nouvelle physique celeste, 1735).

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  • The first, for a memoir on the construction of a clepsydra for measuring time exactly at sea, he gained at the age of twenty-four; the second, for one on the physical cause of the inclination of the planetary orbits, he divided with his father; and the third, for a communication on the tides, he shared with Euler, Colin Maclaurin and another competitor.

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  • parts I and 2; and in the case of planetary parallax in the Mem.

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  • The planetary theory and other particular dynamical problems likewise occupied his attention from time to time.

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  • Thus in 1864 the spectroscope yielded him evidence that planetary and irregular nebulae consist of luminous gas - a conclusion tending to support the nebular hypothesis of the origin of stars and planets by condensation from glowing masses of fluid material.

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  • Propitiatory abstinences were recommended when the natal asterism was menaced by unfavourable planetary conjunctions.

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  • From 1848 to 1878 it was but with few interruptions employed for observations of nebulae (see Nebula); and many previously unknown features in these objects were revealed by it, especially the similarity of "annular" and "planetary" nebulae, and the remarkable "spiral" configuration prevailing in many of the brighter nebulae.

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  • 88), although now discarded, received countenance from the finding of Juno by Harding, and of Vesta by himself, in the precise regions of Cetus and Virgo where the nodes of such supposed planetary fragments should be situated.

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  • 97 Ursae majoris is of the planetary type; the earl of Rosse observed two spiral condensations turning in opposite directions, - hence its name, - the " Owl nebula."

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  • The isothermal lines, in fact, suggest that in the vast area of the Pacific something corresponding to the " planetary circulation " is established, further investigation of which may be of extreme value in relation to current inquiries concerning the upper air.

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  • 2 There can scarcely be any doubt as to the origin of these seven (five) powers; they are the seven planetary divinities, the sun, moon and five planets.

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  • This collective grouping of the seven (five) planetary divinities is derived from the late Babylonian religion, which can definitely be indicated as the home of these ideas (Zimmern, Keilinschriften in dem alien Testament, ii.

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  • period the Babylonian religion centred in the adoration of the seven planetary deities.

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  • For in the Babylonian religion the planetary constellations are reckoned as the supreme deities.

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  • We must also reject the theory that this degradation of the planetary deities into daemons is due to the influence of Hebrew monotheism, for almost all the Gnostic sects take up a definitely hostile attitude towards the Jewish religion, and almost always the highest divinity among the Seven is actually the creator-God of the, Old Testament.

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  • Among Asiatic points of resemblance to which attention has since been called is the Mexican belief in the nine stages of heaven and hell, an idea which nothing in nature would suggest directly to a barbaric people, but which corresponds to the idea of successive heavens and hells among Brahmans and Buddhists, who apparently learnt it (in common with our own ancestors) from the Babylonian-Greek astronomical theory of successive stages or concentric planetary spheres belonging to the planets, &c. The Spanish chronicles also give accounts of a Mexican game called patolli, played at the time of the conquest with coloured stones moved on the squares of a cross-shaped figure, according to the throws of beans marked on one side; the descriptions of this rather complicated game correspond closely with the Hindu backgammon called pachisi (see Tylor in Jour.

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  • He, moreover, sought in the events of his own life a verification of the theory of planetary influences; and it is to this practice that we owe the summary record of each year's occurrences which, continued almost to his death, affords for his biography a slight but sure foundation.

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  • In this, the most memorable of Kepler's multifarious writings, two of the cardinal principles of modern astronomy - the laws of elliptical orbits and of equal areas - were established (see Astronomy: History); important truths relating to gravity were enunciated, and the tides ascribed to the influence of lunar attraction; while an attempt to explain the planetary revolutions in the then backward condition of mechanical knowledge produced a theory of vortices closely resembling that afterwards adopted by Descartes.

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  • This extraordinary production is memorable as having announced the discovery of the "third law" - that of the sesquiplicate ratio between the planetary periods and distances.

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  • His demonstration that the planes of all the planetary orbits pass through the centre of the sun, coupled with his clear recognition of the sun as the moving power of the system, entitles him to rank as the founder of physical astronomy.

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  • But the fantastic relations imagined by him of planetary movements and distances to musical intervals and geometrical constructions seemed to himself discoveries no less admirable than the achievements which have secured his lasting fame.

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  • He clearly perceived the significant analogy between terrestrial gravity and the force exerted in the solar system, and by the ingenious device of a circular pendulum illustrated the composite character of the planetary movements.

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  • Next, dependent on the inclination of the earths axis, is the division of the planetary year into the terrestrial seasons, with winter and summer changes of temperature, wind-strength and precipitation: these seasonal changes are not of the restrained measure that is characteristic of the oceanic southern temperate zone, but of the exaggerated measure appropriate to the continental interruptions of ~the northern land-and-water zone, to which the term temperate is so generally inapplicable.

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  • The warmed air of summer produces an area of low pressure in the west-central United States, which interrupts the belt of high pressure that planetary conditions alone would form around the earth about latitude 30; hence there is a tendency of the summer winds to blow inward from the northern Pacific over the Cordilleras toward the continental centre, and from the trades of the torrid Atlantic up the Mississippi Valley; conversely in winter time, the cold air over the lands produces a large area of high pressure from which the winds tend to flow outward; thus repelling the westerly winds of the northern Pacific and greatly intensifying the outflow southward to the Gulf of Mexico and eastward to the Atlantic. As a result of these seasonal alternations of temperature and pressure there is something of a monsoon tendency developed in the winds of the Mississippi Valley, southerly infiowing winds prevailing in summer and northerly outfiowing winds in winter; but the general tendency to inflow and outflow is greatly modified by the relief of the lands, to which we next turn.

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  • He quotes as an instance that Newton in this way added to the planetary appearances contained in Kepler's laws the gravitation of the planets to the sun, as a notion of causality not contained in the appearances, and thus discovered that gravitation is the cause of the appearances.

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  • Kepler (1571-1630) was led by his study of the planetary motions to reject this method of statement as inadequate, and it is in fact incapable of giving a complete representation of the motions in question.

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  • In 1609 and 1619 Kepler published his new laws of planetary motion, which were subsequently shown by Newton to agree with the results obtained by experiment for the motion of terrestrial bodies.

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  • As a law of acceleration of the planets relatively to the sun, its approximate agreement with Kepler's third law of planetary motion follows readily from a consideration of the character of the acceleration of a point moving uniformly in a circle.

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  • Some years later he succeeded in showing that Kepler's elliptic orbit for planetary motion agreed with the assumed law of attraction; he also completed the co-ordination with terrestrial gravity by his investigation of the attractions of homogeneous spherical bodies.

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  • This is not inconsistent with the law of gravitation, for such estimates as have been made of planetary perturbations due to stars give results which are insignificant in comparison with quantities at present measurable.

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  • Pursuing the investigations of Laplace, he demonstrated with greater rigour the stability of the solar system, and calculated the limits within which the eccentricities and inclinations of the planetary orbits vary.

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  • Recalled once more, by the summons of Arago, to planetary studies, he was this time invited to turn his attention to Uranus.

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  • This was nothing less than the complete revision of the planetary theories, followed by a laborious comparison of results with the most authentic observations, and the construction of tables representing the movements thus corrected.

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  • His planetary and solar tables were adopted by the Nautical Almanac, as well as by the Connaissance des temps.

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  • (1827), &c. In the first of these memoirs Poisson discusses the famous question of the stability of the planetary orbits, which had already been settled by Lagrange to the first degree of approximation for the disturbing forces.

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  • Poisson showed that the result could be extended to a second approximation, and thus made an important advance in the planetary theory.

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  • Before leaving it for Queen's College, Oxford, in 1673, he had observed the change in the variation of the compass, and at the age of nineteen, he supplied a new and improved method of determining the elements of the planetary orbits (Phil.

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  • and very delicate planetary or lunar details.

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  • In this connexion it may be noted that the spectrum of Nova Persei, after passing through a stage in which it resembled that of a planetary nebula, has now become of the Wolf-Rayet type.

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  • when the more general law of gravitation is shown to include the less general laws of planetary gravitation.

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  • Newton did indeed first show synthetically what kind of motions by mechanical laws have their ground in a centripetal force varying inversely as the square of the distance (all P is M); but his next step was, not to deduce synthetically the planetary motions, but to make a new start from the planetary motions as facts established by Kepler's laws and as examples of the kind of motions in question (all S is P); and then, by combining these two premises, one mechanical and the other astronomical, he analytically deduced that these facts of planetary motion have their ground in a centripetal force varying inversely as the squares of the distances of the planets from the sun (all S is M).

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  • This done, as the major is convertible, the analytic order - P-M, S-P, S-M - was easily inverted into the synthetic order - M-P, S-M, S-P; and in this progressive order the deduction as now taught begins with the centripetal force of the sun as real ground, and deduces the facts of planetary motion as consequences.

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  • Thereupon the Newtonian analysis which preceded this synthesis, became forgotten; until at last Mill in his Logic, neglecting the Principia, had the temerity to distort Newton's discovery, which was really a pure example of analytic deduction, into a mere hypothetical deduction; as if the author of the saying " Hypotheses non lingo" started from the hypothesis of a centripetal force to the sun, and thence deductively explained the facts of planetary motion, which reciprocally verified the hypothesis.

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  • from the consequential facts of planetary motion to their real ground, i.e.

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  • It is noticeable that Wundt quotes Newton's discovery of the centripetal force of the planets to the sun as an instance of this supposed hypothetical, analytic, inductive method; as if Newton's analysis were a hypothesis of the centripetal force to the sun, a deduction of the given facts of planetary motion, and a verification of the hypothesis by the given facts, and as if such a process of hypothetical deduction could be identical with either analysis or induction.

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  • Really, we first experience that particular causes have particular effects; then induce that causes similar to those have effects similar to these; finally, deduce that when a particular cause of the kind occurs it has a particular effect of the kind by synthetic deduction, and that when a particular effect of the kind occurs it has a particular cause of the kind by analytic deduction with a convertible premise, as when Newton from planetary motions, like terrestrial motions, analytically deduced a centripetal force to the sun like centripetal forces to the earth.

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  • relation to the stars; in the planetary theory the origin is trans - ferred to the sun, and afterwards to the mass-centre of thf solar system; and so on.

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  • The formation of the tables of a planet has been described by Cayley as " the culminating achievement of astronomy," but the gigantic task which Newcomb laid out for himself, and which he carried on for more than twenty years, was the building up, on an absolutely homogeneous basis, of the theory and tables of the whole planetary system.

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  • Since the epoch of Alexander the Great IIarran had been a famous centre of pagan and Hellenistic culture; its people were Syrian heathens, star-worshippers versed in astrology and magic. In their temples the planetary powers were propitiated by blood-offerings, and it is probable that human victims were occasionally sacrificed even as late as the 9th century of our era.

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  • From the astronomers the Stoics borrowed their picture of the universe - a plenum in the form of a series of layers or concentric rings, first the elements, then the planetary and stellar spheres, massed round the earth as centre - a picture which dominated the imagination of men from the days of Eudoxus down to those of Dante or even Copernicus.

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  • we have memoirs relating to the proof of the theorem that every numerical equation has a real or imaginary root, the memoir on the Hypergeometric Series, that on Interpolation, and the memoir Determinatio attractionis - in which a planetary mass is considered as distributed over its orbit according to the time in which each portion of the orbit is described, and the question (having an implied reference to the theory of secular perturbations) is to find the attraction of such a ring.

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  • He made some preliminary use of these expressions in 1817, in a paper on Kepler's Problem (Transactions Berlin Academy, 1816-1817, p. 49), and fully developed them seven years later, for the purposes of a research into planetary perturbations (Ibid.

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  • On the 4th and 12th of August, as afterwards appeared, the planet was actually observed; but owing to the want of a proper star-map it was not then recognized as planetary.

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  • Among Whewell's other works - too numerous to mention - reference must be made to writings popular in their day, such as the Bridgewater Treatise on Astronomy (1833), and the essay, Of the Plurality of Worlds (1854), in which he argued against the probability of planetary life, and also to the Platonic Dialogues for English Readers (1859-1861), to the Lectures on the History of Moral Philosophy in England (1852), to the essay, Of a Liberal Education in General, with particular reference to the Leading Studies of the University of Cambridge (1845), to the important edition and abridged translation of Grotius, De jure belli et pacis (1853), and to the edition of the Mathematical Works of Isaac Barrow (1860).

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  • The science had its origin in the demonstration by Sir Isaac Newton that Kepler's three laws of planetary motion, and the law of gravitation, in the case of two bodies, could be mutually derived from each other.

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  • If we conceive a pole to each of these orbits, determined by the points in which lines perpendicular to their planes intersect the celestial sphere, the pole of the satellite orbit will revolve around the pole of the planetary orbit precisely as the pole of the earth does around the pole of the ecliptic, the inclination of the two orbits remaining unchanged.

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  • He attempted no detailed discussion of planetary theory; but his catalogue of 1 080 stars, divided into six classes of brightness, or " magnitudes," is one of the finest monuments of antique astronomy.

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  • and cast horoscopes; here Tobit ben Korra (836 901) developed his long unquestioned, yet misleading theory of the " trepidation " of the equinoxes; Abd-ar-rahman al-Safi 9 0 3-9 86) revised at first hand the catalogue of Ptolemy; 3 and Abulwefa (939-998), like al-Safi, a native of Persia, made continuous planetary observations, but did not (as alleged by L.

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  • By this means, the planetary " retrogradations " were explained as simple perspective effects due to the combination of the earth's revolutions with those of her sister orbs.

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  • Nor was it feasible, on this showing, to place the sun at the true centre of any of the planetary orbits; so that his ruling position in the midst of them was illusory.

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  • He aimed at finding out the cause as well as the mode of the planetary revolutions; and his demonstration that the planes in which they are described all pass through the sun was an important preliminary to a physical explanation of them.

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  • Yet they were never assimilated by Kepler; while, on the other hand, the laws of planetary circulation he had enounced were strangely ignored by Galileo.

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  • Ismael Bouillaud (1605-1694) stated in 1645 the fact of planetary circulation under the sway of a sun-force decreasing as the inverse square of the distance; and the inevitableness of this same " duplicate ratio " was separately perceived by Robert Hooke, Edmund Halley and Sir Christopher Wren before Newton's discovery had yet been made public. He was the only man of his generation who both recognized the law, and had power to demonstrate its validity.

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  • Gravitation was thus shown to be the sole influence governing the movements of planets and satellites; the figure of the rotating earth was successfully explained by its action on the minuter particles of matter; tides and the precession of the equinoxes proved amenable to reasonings based on the same principle; and it satisfactorily accounted as well for some of the chief lunar and planetary inequalities.

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  • The subject of planetary perturbations was next attacked.

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  • The proper share of each in bringing about this memorable result is not easy to apportion, since they freely imparted and profited by one another's advances and improvements; it need only be said that the fundamental proposition of the invariability of the planetary major axes laid down with restrictions by Laplace in 1773, was finally established by Lagrange in 1776; while Laplace in 1784 proved the subsistence of such a relation between the eccentricities of the planetary orbits on the one hand, and their inclinations on the other, that an increase of either element could, in any single case, proceed only to a very small extent.

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  • Poisson's application to them in 1809 of Lagrange's theory of the variation of constants; Philippe de Pontecoulant successfully used in 1829, for the prediction of the impending return of Halley's comet, a system of " mechanical quadratures " published by Lagrange in the Berlin Memoirs for 1778; and in his Theorie analytique du systeme du monde (1846) he modified and refined general theories of the lunar and planetary revolutions.

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  • Leverrier undertook in 1839, and concluded in 1876, the formidable task of revising all the planetary theories and constructing from them improved tables.

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  • This was the first planetary transit observed.

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  • Among the fruits of the strenuous career of Nicolas Louis de Lacaille were tables of the sun, in which terms depending upon planetary perturbations were, for the first time, introduced (1758); an extended acquaintance with the southern heavens; and a determination of the moon's parallax from observations made at opposite extremities of an arc of the meridian 85' in length.

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  • Nebular chemistry was initiated by the same investigator when, on the 29th of August 1864, he observed the bright-line spectrum of a planetary nebula in Draco.

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  • of the Planetary Systems (1906); G.

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  • Thus a new branch of the lunar theory was suggested - the determination by theory of the effect of planetary action.

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  • In his Dialogo dei massimi sistemi, printed not less than thirteen years after the last of the three laws had been given to the world, the epicycles by which Copernicus, adhering to the ancient postulate of uniform circular motion, had endeavoured to reduce to theory the irregularities of the planetary movements, were neither expressly adopted nor expressly rejected; and the conclusion seems inevitable that this grave defection from the cause of progress was due to his perhaps unconscious reluctance to accept discoveries which he had not originated.

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  • Of his two capital errors, regarding respectively the theory of the tides and the nature of comets, the first was insidiously recommended to him by his passionate desire to find a physical confirmation of the earth's double motion; the second was adopted for the purpose of rebutting an anti-Copernican argument founded on the planetary analogies of those erratic subjects of the sun.

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  • The theory of the ecliptic as representing the course of the sun through the year, divided among twelve constellations with a measurement of 30 to each division, is also of Babylonian origin, as has now been definitely proved; but it does not appear to have been perfected until after the fall of the Babylonian empire in 539 B.C. Similarly, the other accomplishments of Babylonian astronomers, such as their system or rather systems of moon calculations and the drawing up of planetary tablets, belong to this late period, so that the golden age of Babylonian astronomy belongs not to the remote past, as was until recently supposed, but to the Seleucid period, i.e.

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  • Diseases and distrubances of the ordinary functions of the organs were attributed to the influence of planets or explained as due to conditions observed in a constellation or in the position of a star; and an interesting survival of this bond between astrology and medicine is to be seen in the use up to the present time of the sign of Jupiter 4., which still heads medicinal prescriptions, while, on the other hand, the influence of planetary lore appears in the assignment of the days of the week to the planets, beginning with Sunday, assigned to the sun, and ending with Saturday, the day of Saturn.

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  • Chaucer wrote a treatise on the astrolabe; Milton constantly refers to planetary influences; in Shakespeare's King Lear, Gloucester and Edmund represent respectively the old and the new faith.

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  • The hypothesis of the original nebular condition of the system, with the consequent explanation of the great phenomena of planetary formations and movements of the satellites and rings, is unquestionably to be assigned to Kant.

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  • Planetary nebulae, supernovae, stellar remnants - white dwarfs, neutron stars, black holes.

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  • To make this a little easier for new folks, here is the planetary rulers of your sun sign.

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  • The usual construction is to use the planetary section for mixing, feeding the compound into a single screw extruder for metering.

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  • At K Battenfeld is showing machines with both planetary and twin screw extruders as the metering stage.

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  • However, suppose an alien civilization somehow finds a way to launch the aggressive colonization of other planetary systems while avoiding self-destruction.

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  • Caltech have a Virtual Planetary Laboratory aimed at reproducing possible spectral signatures to help the Terrestrial Planet Finder program.

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  • As it passed through the planetary spheres, so it received a portion of each planet 's nature.

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  • The results will show how far planetary waves penetrate into the lower thermosphere under " direct " forcing.

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  • Time and scale size of planetary wave signatures in the ionospheric f region: Role of the geomagnetic activity and mesosphere/lower thermosphere winds.

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  • A hundred years of careful search has not produced a tittle of evidence that any planetary system save our own exists.

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  • A dearth of planetary transits in the direction of NGC 6940 (Hood et al.

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  • Fine-scale transient upwelling (from eddies, fronts and planetary waves) provides the dominant supply of nitrate.

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  • When the topic of global warming comes up it's clear that there is still some controversy about the subject, and people ask if it is humans causing global warming or if it's a natural planetary cycle.

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  • Debating whether global warming is human caused or a natural planetary cycle is almost a moot point when decreasing the greenhouse effect and slowing global warming is humanly possible.

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  • Each planet you take control over you receive a planetary bonus to help your troops or sabotage your enemies in upcoming galactic battles.

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  • Four successful planetary conquests grants you access to the ultimate weapon available to your faction.

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  • Viking brand stand mixers feature a unique planetary mixing action that effectively reduces the need to constantly scrape the sides of the bowl.

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  • In planetary mixing, the beater is turned in a clockwise pattern around the bowl while the shaft rotates counterclockwise.

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  • In the daily readings section, the Love Psychic discusses some of the more significant planetary movements for the current month.

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  • This service includes a tarot card and planetary reading for you and your partner.

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  • These planetary movements will affect you as well.

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  • Beware of Uranus when it travels through your Seventh House because this planetary movement can impact your love life, either positively or negatively.

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  • This will help you to see the major planetary aspects in your chart.

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  • Further, Penny Thornton not only gives a planetary review for the week, but also for the month and year.

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  • Her general forecast focuses on the planetary movements that will have an affect on everyone, regardless of sign.

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  • These personal horoscopes are detailed reports focused on specific dates or planetary movements that have the most impact on a person's life over the following year.

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  • Adult scopes are more likely to contain astrological terms or go into specific planetary alignments.

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  • The Planetary Spread: The seven cars here are read from the perspective of the planets.

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  • By taking responsibility for yourself, you'll emerge from this planetary shift (a spiritual shift) a newly recreated being.

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  • Mars, Aries' planetary ruler, governs war, sex, sexual energy, hand to hand combat and even athletes.

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  • When considering who is compatible with a Leo, take a careful glance at both individuals' charts and examine all the planetary placements.

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  • Pisces zodiac characteristics are easily seen when viewed through the lens of the sign's astrological house and planetary ruler, Neptune.

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  • Much of this comes from the fact that Jupiter was the ancient planetary ruler of Pisces, and much of that expansive quality still resides within the sign.

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  • One important thing to remember when you are perusing a Taurus zodiac profile is that this sign is not limited to the planetary rulership of the sun.

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  • Several factors, including the sign's planetary ruler and house, help contribute to Sagittarius' shining personality.

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  • His lover's planetary aspects should provide complementary strengths and weaknesses that will work well alongside the Capricorn.

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  • Elemental conflicts and unfavorable planetary alignments in a natal chart can serve to highlight the more negative aspects of the Virgoan character.

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  • Should the Scorpio and Taurus in question host natal charts that display several inauspicious planetary aspects, a volatile relationship is much more likely.

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  • This occurrence may be due to the many other planetary influences within the charts of both individuals.

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  • If you learn to locate and interpret these planetary positions and their effects, you will be able to utilize ordinary astrology software to enhance your astrological findings.

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  • Mercury is the planetary ruler of Virgo, and this often bestows the sign with a wonderful sense of humor that if often self-deprecating.

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  • You can expect to see more negative aspects of Pisces in a chart that is dominantly Pisces and, unfortunately, rife with off-putting planetary angles.

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  • Everyone is left to wonder if this was a self-fulfilling prophecy when Kara flies her Viper into a swirling planetary storm and is lost when her ship is destroyed.

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  • There, he also served as the Director of the Laboratory for Planetary studies.

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