## History of Astronomy |

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Page 18

He also found the sun ' s

276 – 196 B . C . ) measured the inclination to the equator of the sun ' s apparent

path in the heavens — i . e . , he measured the obliquity of the ecliptic , making ...

He also found the sun ' s

**diameter**, correctly , to be half a degree . Eratosthenes (276 – 196 B . C . ) measured the inclination to the equator of the sun ' s apparent

path in the heavens — i . e . , he measured the obliquity of the ecliptic , making ...

Page 54

Newton found the distance through which she is actually drawn as a fraction of

the earth ' s

use a wrong

for a ...

Newton found the distance through which she is actually drawn as a fraction of

the earth ' s

**diameter**. But when he first examined this matter he proceeded touse a wrong

**diameter**for the earth , and he found a serious discrepancy . This ,for a ...

Page 81

Airy combined the functions of both , and employed the same constructors as

before to make a transit - circle with a telescope of eleven and a - half feet focus

and a circle of six - feet

Airy combined the functions of both , and employed the same constructors as

before to make a transit - circle with a telescope of eleven and a - half feet focus

and a circle of six - feet

**diameter**, the object - glass being eight inches in**diameter**.### What people are saying - Write a review

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### Contents

ANCIENT GREEK ASTRONOMY | 3 |

GALILEO AND THE TELESCOPENOTIONS OF GRAVITY | 46 |

NEWTONS SUCCESSORS HALLEY EULER | 60 |

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### Common terms and phrases

accepted accurate ancient appear astronomers attraction bodies bright calculations called catalogue cause centre century Chinese circle comet compared complete Copernicus determined diameter direction discovered discovery distance earth eclipse effect elements enabled epicycles equal error explain fact fixed follow force four Galileo gave give given gravitation heavens held Herschel increased interesting Jupiter Kepler knowledge known later light lunar Mars mass mathematical mean measured method miles moon moon's motion move nebulæ Newton noted noticed object observations Observatory opposition orbit original parallax pass period photographic physical planet planetary pole position predicted progress proper motion proved records researches revolve ring rotation round Royal satellites seems seen showed solar system spectroscope spectrum stars studied sun's supposed surface tables telescope theory tion trace true Tycho Brahe UNIVERSITY