## History of Astronomy |

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Page 45

If the earth be not round (but spheroidal ?), then bodies at different latitudes will

not be

centre. 5. If the earth and moon were not retained in their orbits by vital force (ant

...

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 the neighbourhood of thatcentre. 5. If the earth and moon were not retained in their orbits by vital force (ant

...

Page 54

I.: The total

of a body is reciprocally as the square of the distance from the particles.

I.: The total

**attraction**of gravitation on a planet arises, and is composed, out of the**attraction**on the separate parts. Cor. II.: The**attraction**on separate equal particlesof a body is reciprocally as the square of the distance from the particles.

Page 55

He invented a mathematical method which he used for computing the ratio of the

polar to the equatorial diameter. He then noticed that the consequent bulging of

matter at the equator would be

He invented a mathematical method which he used for computing the ratio of the

polar to the equatorial diameter. He then noticed that the consequent bulging of

matter at the equator would be

**attracted**by the moon unequally, the nearest ...### What people are saying - Write a review

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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