History of Astronomy |
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Page 69
In 1844, assuming a circular orbit, and a mean distance agreeing with Bode's law
, he obtained a first approximation to the position of the supposed planet. He then
asked Professor Challis, of Cambridge, to procure the latest observations of ...
In 1844, assuming a circular orbit, and a mean distance agreeing with Bode's law
, he obtained a first approximation to the position of the supposed planet. He then
asked Professor Challis, of Cambridge, to procure the latest observations of ...
Page 122
It was predicted to return in 1822, and was recognised by him as identical with
many previous comets. This comet, called after Encke, has showed in each of its
returns an inexplicable reduction of mean distance, which led to the assertion of
a ...
It was predicted to return in 1822, and was recognised by him as identical with
many previous comets. This comet, called after Encke, has showed in each of its
returns an inexplicable reduction of mean distance, which led to the assertion of
a ...
Page 123
the same as Jupiter's mean distance ; and six have an aphelion distance about
ten per cent, greater than Neptune's mean distance. Other comets are similarly
associated with the planets Saturn and Uranus. The physical transformations of ...
the same as Jupiter's mean distance ; and six have an aphelion distance about
ten per cent, greater than Neptune's mean distance. Other comets are similarly
associated with the planets Saturn and Uranus. The physical transformations of ...
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Contents
Ancient AstronomyChinese and Chaldeans | 7 |
Ancient Greek Astronomy | 13 |
The Reign of Epicycles From Ptolemy | 23 |
3 other sections not shown
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Common terms and phrases
accurate observations Airy ancient astro Astronomer Royal astronomical units attraction axis bright calculations Cape Cassini catalogue centre century Chinese comet compute Copernicus diameter discovered discovery earth eclipse Egyptian epicycles equatoreal error excentric explain fact fixed stars Galileo Greenwich Halley Halley's comet heavenly bodies heavens heliometer Hipparchus Huggins hydrogen hypothesis instruments Johann Kepler John Herschel Jupiter Jupiter's Kepler Lick Observatory light line of sight lunar Mars mathematical mean distance mean motion measured Mercury meteor miles a second moon moon's nebula Newton nodes noticed Observatory orbit parallax perihelion period photographic physical planet planetary pole position predicted proper motion proved Ptolemy R. S. Phil recognised records refractor retrograde retrograde motion revolve round ring rotation satellites seems seen showed Sirius solar system spectra spectroscope spectrum sphere spots stellar sun-spots supposed tables telescope theory tion Trans Tycho Brahe Uranus velocity Venus Verrier zenith
Bibliographic information
| Title | History of Astronomy The history of science series |
| Author | George Forbes |
| Publisher | Watts, 1921 |
| Original from | Indiana University |
| Digitized | 5 Aug 2010 |
| Length | 150 pages |
| Export Citation | BiBTeX EndNote RefMan |