History of Astronomy |
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Page 28
attack the principle of the epicyclical theory : he merely sought to make it more
simple by placing the centre of the earth's orbit in the centre of the universe. This
was the point to which the motions of the planets were referred, for the planes of ...
attack the principle of the epicyclical theory : he merely sought to make it more
simple by placing the centre of the earth's orbit in the centre of the universe. This
was the point to which the motions of the planets were referred, for the planes of ...
Page 45
because it is the centre of the universe, but because it is the centre of the
attracting particles of the earth. 4. If the earth be not round (but spheroidal ?), then
bodies at different latitudes will not be attracted to its centre, but to different points
in ...
because it is the centre of the universe, but because it is the centre of the
attracting particles of the earth. 4. If the earth be not round (but spheroidal ?), then
bodies at different latitudes will not be attracted to its centre, but to different points
in ...
Page 74
About 300 B.C. an observatory fitted with circular instruments for star positions
was set up at Alexandria, the then centre of civilisation. We know almost nothing
about the instruments used by Hipparchus in preparing his star catalogues and
his ...
About 300 B.C. an observatory fitted with circular instruments for star positions
was set up at Alexandria, the then centre of civilisation. We know almost nothing
about the instruments used by Hipparchus in preparing his star catalogues and
his ...
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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 |