History of Astronomy |
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Page 32
... instruments , etc. , painted on the wall ; showing assistants using the sight , watching the clock , and recording . ( From the author's copy of the Astronomia Instaurate Mechanica . ) Book II . THE DYNAMICAL PERIOD 5. Discovery of the.
... instruments , etc. , painted on the wall ; showing assistants using the sight , watching the clock , and recording . ( From the author's copy of the Astronomia Instaurate Mechanica . ) Book II . THE DYNAMICAL PERIOD 5. Discovery of the.
Page 47
... Europe . He found curious irregular black spots on the sun , revolving round it in twenty - seven days ; hills and valleys on the moon ; the planets showing discs of sensible size , not points like the fixed stars ; THE DYNAMICAL PERIOD 47.
... Europe . He found curious irregular black spots on the sun , revolving round it in twenty - seven days ; hills and valleys on the moon ; the planets showing discs of sensible size , not points like the fixed stars ; THE DYNAMICAL PERIOD 47.
Page 48
George Forbes. sensible size , not points like the fixed stars ; Venus showing phases according to her position in relation to the sun ; Jupiter accompanied by four moons ; Saturn with appendages that he could not explain , but unlike ...
George Forbes. sensible size , not points like the fixed stars ; Venus showing phases according to her position in relation to the sun ; Jupiter accompanied by four moons ; Saturn with appendages that he could not explain , but unlike ...
Page 52
... showing that all of these were included in his simple statement about the law of universal gravitation ; and proceeding to deduce from that law new irregularities in the motions of the moon which had never been noticed , and to discover ...
... showing that all of these were included in his simple statement about the law of universal gravitation ; and proceeding to deduce from that law new irregularities in the motions of the moon which had never been noticed , and to discover ...
Page 79
... un- reduced observations . Those relating to the stars were reduced by Bessel and published in 1818 , at Königs- berg , in his well - known standard work , Fundamenta Astronomia . In it are results showing the laws of OBSERVATION 79.
... un- reduced observations . Those relating to the stars were reduced by Bessel and published in 1818 , at Königs- berg , in his well - known standard work , Fundamenta Astronomia . In it are results showing the laws of OBSERVATION 79.
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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 LIBRARIES light lunar Mars mass mathematical mean measured method miles moon moon's motion move Newton 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 SIGILLUM solar system spectroscope spectrum stars studied sun's supposed surface tables telescope theory tion trace true Tycho Brahe UNIVERSITY VERITAS