Encke sentence example
- JOHANN FRANZ ENCKE (1791-1865), German astronomer, was born at Hamburg on the 23rd of September 1791.
- Encke visited England in 1840.
- See Johann Franz Encke, sein Leben and Wirken, von Dr C. Bruhns (Leipzig, 1869), to which a list of his writings is appended.
- Up to about the middle of the 19th century it was supposed that transits of Venus across the disk of the sun afforded the most trustworthy method of making the determination in question; and when Encke in 1824 published his classic discussion of the transits of 1761 and 1769, it was supposed that we must wait until the transits of 1874 and 1882 had been observed and discussed before any further light would be thrown on the subject.
- The parallax 8.5776" found by Encke was therefore accepted without question, and was employed in the Nautical Almanac from 1834 to 1869.Advertisement
- ' The most remarkable feature of the discussion since 1862 is that the successive examinations of the subject have led to a continually diminishing value, so that at the present time it seems possible that the actual parallax of the sun is almost as near to the old value of Encke as to that which first replaced it.
- A table of eighty-seven calculated orbits was appended, enlarged by Encke in the second edition (1847) to 178, and by Galle in the third (1864) to 242.
- Encke, the astronomer who first investigated its orbit and showed its periodicity.
- 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.
- Encke, Berlin Abhandlungen (1827), p. xi.; H.Advertisement
- Two years later he went to Berlin to study astronomy under Encke, and in 1859 was appointed assistant observer at Pulkova, a post which he resigned in 1860 for a similar one at Brera, Milan.
- and the empress Augusta under marble effigies by Encke.
- Encke, who determined its remarkably short period.
- Encke, Geddchtnissrede auf Bessel (Berlin, 1846); C. T.
- Encke, it is true, derived from them in 1822-1824 what seemed an authentic parallax of 8.57", implying a distance of 95,370,000 m.; but the confidence it inspired was finally overthrown in 1854 by P. A.Advertisement
- Encke i n 1819, and of Wilhelm von Biela in 1826, led to the theory of their " capture " by the great planets, for which a solid mathematical basis was provided by H.
- Encke's result having been rendered evident through his investigation of a lunar inequality.