Yes, a comet slamming into the planet or some galactic cataclysm could wipe us all out.
Memory of the land in Arkansas streaked across her mind like a comet, leaving a trail of questions in its wake.
This comet has given rise to a longer series of investigations than any other, owing to Encke's result that the orbit was becoming smaller, and the revolutions therefore accelerated, by some unknown cause, of which the most plausible was a resisting medium surrounding the sun.
Donati analysed the light of a small comet into three bright bands.
Crommelin of Greenwich, the latter having carried the comet back to 87 B.C. with certainty, and to 240 B.C. with fair probability.
Tebbutt's comet in 1881 was the first to be satisfactorily photographed.
Having removed to London, he was admitted (November 6, 1618) a licentiate of the college of physicians, and attracted notice by a publication concerning the comet of 1618.
In 1812 Bessel measured with it the angle between the components of the double star 61 Cygni and observed the great comet of 1811.
In her grief at the destruction of the city she plucked out her hair and was changed into a comet; in another version Electra and her six sisters had been placed among the stars as the Pleiades, and the star which she represented lost its brilliancy after the fall of Troy.
Halley's most notable scientific achievements were - his detection of the "long inequality" of Jupiter and Saturn, and of the acceleration of the moon's mean motion (1693), his discovery of the proper motions of the fixed stars (1718), his theory of variation (1683), including the hypothesis of four magnetic poles, revived by C. Hansteen in 1819, and his suggestion of the magnetic origin of the aurora borealis; his calculation of the orbit of the 1682 comet (the first ever attempted), coupled with a prediction of its return, strikingly verified in 1759; and his indication (first in 1679, and again in 1716, Phil.
In the same year he published his essay on comets, Conamen Novi Systematis Cometarum, which was occasioned by the appearance of the comet of 1680.
After a rough estimate of the perturbations it must sustain from the attraction of the planets, he predicted its return for 1757,-a bold prediction at that time, but justified by the event, for the comet again made its appearance as was expected, though it did not pass through its perihelion till the month of March 1759, the attraction of Jupiter and Saturn having caused, as was computed by Clairault previously to its return, a retardation of 618 days.
This comet had been observed in 1066, and the accounts which have been preserved represent it as having then appeared to be four times the size of Venus, and to have shone with a light equal to a fourth of that of the moon.
That this should have been due to the process of dissipation does not seem possible in so short a period; we must therefore consider either that the earlier accounts are greatly exaggerated, or that the brightness of the comet is subject to changes from some unknown cause.
Previous appearances of Halley's comet have been calculated by J.
The known comet of shortest period bears the name of J.
His great contribution to astronomy dates from 1866, when he showed that meteors or shooting stars traverse space in cometary orbits, and, in particular, that the orbits of the Perseids and Comet III., 1862, and of the Leonids and Comet I., 1866, were practically the same.
In 1804 he calculated the orbit of Halley's comet from observations made in 1607 by Thomas Harriot, and communicated his results to H.
As an undergraduate he became deeply interested in astronomy; he observed the comet of 1759 and the transit of Venus of June 1769, and left a quarto volume of astronomical notes.
Schiaparelli's announcement that the orbit of the bright comet of 1862 agreed strictly with the elliptic ring formed by the circulating Perseid meteors; and three other cases of close coincidence were soon afterwards brought to light.
Sir William Huggins repeated the experiment on Winnecke's comet in 1868, Progress only with long exposures could autographic im ?'
It seemed to Pierre that this comet fully responded to what was passing in his own softened and uplifted soul, now blossoming into a new life.
To the right and high up in the sky was the sickle of the waning moon and opposite to it hung that bright comet which was connected in Pierre's heart with his love.
Gazing at the high starry sky, at the moon, at the comet, and at the glow from the fire, Pierre experienced a joyful emotion.
Simon, its reputed author, and exalts him above Moses; (2) it mystically explains the Hebrew vowel points, which did not obtain till 570; (3) the compiler borrows two verses from the celebrated hymn called " The Royal Diadem," written by Ibn Gabirol, who was born about 1021; (4) it mentions the capture of Jerusalem by the crusaders and the re-taking of the Holy City by the Saracens; (5) it speaks of the comet which appeared at Rome, 15th July 1264, under the pontificate of Urban IV.; (6) by a slip the Zohar assigns a reason why its contents were not revealed before5060-5066A.M., i.e.1300-1306A.D., (7) the doctrine of the En Soph and the Sephiroth was not known before the 13th century; and (8) the very existence of the Zohar itself was not known prior 1 See, e.g., G.
Faye in November 1843, the other by Francesco de Vico a year later, were minutely investigated by Leverrier, with the result of disproving the supposed identity of the first with Lexell's lost comet of 1770, and of the other with Tycho's of 1585.
Cassini, the great comet of 1680 after its perihelion passage; and having returned to England, he married in 1682 Mary, daughter of Mr Tooke, auditor of the exchequer, with whom he lived harmoniously for fifty-five years.
A masterly investigation of the comet of 1807 (Konigsberg, 1810) enhanced his reputation, and the king of Prussia summoned him, in 1810, to superintend the erection of a new observatory at Konigsberg, of which he acted as director from its completion in 1813 until his death.
In 1867 the remarkable discovery was made that Tempel's comet (1866: I.) revolved in an orbit identical with that of the Leonids.
Thus a comet may be encountered in the morning dawn or evening twilight, and without such an adjunct the astronomer may lose the whole available opportunity for observation in the vain endeavour to find a suitable comparison-star.
Case of the comitia, the magistrate's purpose was to ask a question Tuttle's comet was first seen by P. F.
But the most striking incident in the history of the verification of Newton's law was the return of Halley's comet to perihelion, on the 12th of March 1759, in approximate accordance with Clairault's calculation of the delays due to the action of Jupiter and Saturn.
His love for Natasha, Antichrist, Napoleon, the invasion, the comet, 666, L'Empereur Napoleon, and L'russe Besuhof--all this had to mature and culminate, to lift him out of that spellbound, petty sphere of Moscow habits in which he felt himself held captive and lead him to a great achievement and great happiness.
He wrote An Astronomical Description of the late Comet (1619); Canicularia (1648); and translated Proclus' De Sphaera, and Ptolemy's De Planetarum Hypothesibus (1620).
The cuts for y e Comet of 1680 & 1681 are printed off and will be sent to Dr Bently this week by the Carrier."
Among them were an elegant solution of the problem to determine the orbit of a comet from three observations, and memoirs on the micrometer and achromatic telescopes.
But although these sometimes wander to distances considerably beyond the orbit of Neptune, it is probable that the extent of the void which separates our system from the nearest star is hundreds of times the distance of the farthest point to which a comet ever recedes.
The orbit of a newly-discovered planet or comet may be computed from three complete observations by well-known methods in a single day.
In Pierre, however, that comet with its long luminous tail aroused no feeling of fear.
From the day when Pierre, after leaving the Rostovs' with Natasha's grateful look fresh in his mind, had gazed at the comet that seemed to be fixed in the sky and felt that something new was appearing on his own horizon--from that day the problem of the vanity and uselessness of all earthly things, that had incessantly tormented him, no longer presented itself.
Directing the finder to the comet, he has at once in the field of view all available comparison stars.
When the scales and position-circle of the heliometer have been set to these readings, the comet and the selected comparison-star appear together in the field of view.
On the other hand, he made it appear all but certain that Vico's comet was the same with one seen by Philippe de Lahire in 1678.
The course of the rays in the meridional section is no longer symmetrical to the principal ray of the pencil; and on an intercepting plane there appears, instead of a luminous point, a patch of light, not symmetrical about a point, and often exhibiting a resemblance to a comet having its tail directed towards or away from the axis.
In January 1812 he placed on the Clyde a steamboat (which he named the "Comet") of about 25 tons, propelled by an engine of three horse power, at a speed of 7 m.
Denning's comet of 1881 and Finlay's of 1886, approached comparatively near to the earth's path, the former within 3,000,000 m.
Having selected the most suitable one he directs the axis of the finder to the estimated middle point between the comet and the star, turns the finder-micrometer in position angle until the images of comet and star lie symmetrically between the parallel position wires, and then turns the micrometer screw (which moves the distance-wires symmetrically from the centre in opposite directions) till one wire bisects the comet and the other the star.
In the Bundahish, however (9th century), the twelve " Akhtars," designated by the same names as our signs, lead the army of Ormazd, while the seven " Awakhtars " or planets (including a meteor and a comet) fight for Ahriman.
As this comet is almost the only one that passes within the orbit of Mercury, it is quite possible that it alone would show the effect of such a medium.
., ` n Ben kelmao ., „ comet, nv, ........
Biela's comet of 1826, which had a period of 6.7 years, presented a significant resemblance of orbit with that of the meteors, but the comet has not been seen since 1852 and has probably been resolved into the meteoric stream of Andromedids.
A comet which appeared in 1861 had a very suggestive agreement of orbit when compared with that of the meteors, and the period computed for it was 415 year's.
The Meteorologica (P 7) mentions the comet of 341.
The list of his works of fiction includes The Stolen Bacillus and other Stories (1895), The Wonderful Visit (1895), The Island of Doctor Moreau (1896), The Plattner Story and Others (1897), When the Sleeper Wakes (1899), The First Men in the Moon (1901), The Food of the Gods (1904), In the Days of the Comet (1906), The War in the Air (1908), Anne Veronica (1909), The History of Mr Polly (191 0).
They are probably dispersed pretty evenly along a very extended ellipse agreeing closely in its elements with comet 1862: III.
Halley's comet conforms very well, however, with a meteoric shower directed from Aquarius early in May.
Michell's other contributions to science are: " Observations on the Comet of January 1760 at Cambridge, Phil.
But the times of revolution are doubtful; the probable period of the comet is 121 years and that of the meteors 1051 years.
His observations of the great comet of January 1672 supplied the basis of modern cometary astronomy.