History of Astronomy |
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Page 22
Ptolemy supposed the centres of the epicycles of Mercury and Venus to be on a
bar passing through the sun, and to be between the earth and the sun. The
centres of the epicycles of Mars, Jupiter, and Saturn were supposed to be further
away ...
Ptolemy supposed the centres of the epicycles of Mercury and Venus to be on a
bar passing through the sun, and to be between the earth and the sun. The
centres of the epicycles of Mars, Jupiter, and Saturn were supposed to be further
away ...
Page 23
It did not occur to Ptolemy to place the centres of the epicycles of Mercury and
Venus at the sun, and to extend the same system to the major planets. Something
of this sort had been proposed by the Egyptians (we are told by Cicero and ...
It did not occur to Ptolemy to place the centres of the epicycles of Mercury and
Venus at the sun, and to extend the same system to the major planets. Something
of this sort had been proposed by the Egyptians (we are told by Cicero and ...
Page 110
This property has also been ascribed to Mercury ; but in neither case has the
evidence been generally accepted. Twenty-four hours is probably about the
period of rotation for each of these planets. Several observers have claimed to
have ...
This property has also been ascribed to Mercury ; but in neither case has the
evidence been generally accepted. Twenty-four hours is probably about the
period of rotation for each of these planets. Several observers have claimed to
have ...
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Contents
Ancient AstronomyChinese and Chaldeans | 7 |
Ancient Greek Astronomy | 13 |
The Reign of Epicycles From Ptolemy | 23 |
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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 |