History of Astronomy |
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Page 27
The first point relates to the seasons, and it shows a strange ignorance of the
laws of rotating bodies. To use the words of Delambre,1 in drawing attention to
the strange conception, he imagined that the earth, revolving round the sun,
ought ...
The first point relates to the seasons, and it shows a strange ignorance of the
laws of rotating bodies. To use the words of Delambre,1 in drawing attention to
the strange conception, he imagined that the earth, revolving round the sun,
ought ...
Page 55
He saw that the figure of the earth depends partly on the mutual gravitation of its
parts, and partly on the centrifugal tendency due to the earth's rotation, and that
these should cause a flattening of the poles. He invented a mathematical method
...
He saw that the figure of the earth depends partly on the mutual gravitation of its
parts, and partly on the centrifugal tendency due to the earth's rotation, and that
these should cause a flattening of the poles. He invented a mathematical method
...
Page 109
... bar to the discovery of markings by which the axis and period of rotation could
be fixed. Cassini gave the rotation as twenty-three hours, by observing a bright
spot on her surface. Shroter made it 23b. 21m. 19s. THE PHYSICAL PERIOD 109
.
... bar to the discovery of markings by which the axis and period of rotation could
be fixed. Cassini gave the rotation as twenty-three hours, by observing a bright
spot on her surface. Shroter made it 23b. 21m. 19s. THE PHYSICAL PERIOD 109
.
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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 |