## History of Astronomy |

### From inside the book

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Page 52

Quite the most important event in the whole history of

publication , in 1687 , of Newton ' s Principia ( Philosophiae Naturalis Principia

Mathematica ) . In this great work Newton started from the beginning of things ...

Quite the most important event in the whole history of

**physical**astronomy was thepublication , in 1687 , of Newton ' s Principia ( Philosophiae Naturalis Principia

Mathematica ) . In this great work Newton started from the beginning of things ...

Page 123

The

unexplained phenomena in the heavens . But , for

greatest interest attaches to the reduction of radius vector of Encke ' s comet , the

splitting of ...

The

**physical**transformations of comets are among the most wonderful ofunexplained phenomena in the heavens . But , for

**physical**astronomers , thegreatest interest attaches to the reduction of radius vector of Encke ' s comet , the

splitting of ...

Page 127

But in Kepler ' s case the obviously implied

motions , even before Newton explained the simplicity of conception involved ,

made astronomers quite ready to waive the claim for a rigid proof of the earth ' s

motion ...

But in Kepler ' s case the obviously implied

**physical**theory of the planetarymotions , even before Newton explained the simplicity of conception involved ,

made astronomers quite ready to waive the claim for a rigid proof of the earth ' s

motion ...

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### Contents

ANCIENT GREEK ASTRONOMY | 3 |

GALILEO AND THE TELESCOPENOTIONS OF GRAVITY | 46 |

NEWTONS SUCCESSORS HALLEY EULER | 60 |

### Other editions - View all

### 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