History of Astronomy |
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Page 19
... catalogue all the principal stars so as to know if any others appeared or disappeared . Here his experiences resembled those of several later astronomers , who , when in search of some special object , have been rewarded by a discovery ...
... catalogue all the principal stars so as to know if any others appeared or disappeared . Here his experiences resembled those of several later astronomers , who , when in search of some special object , have been rewarded by a discovery ...
Page 24
... catalogue of stars , the first since the time of Hipparchus . At the close of the fifteenth century King Alphonso of Spain employed computers to produce the Alphonsine Tables ( 1488 A.D. ) , Purbach translated Ptolemy's book , and ...
... catalogue of stars , the first since the time of Hipparchus . At the close of the fifteenth century King Alphonso of Spain employed computers to produce the Alphonsine Tables ( 1488 A.D. ) , Purbach translated Ptolemy's book , and ...
Page 35
... catalogues , his probable error in right ascension is only 24 " , 1 , and in declination only 25 " , 9 . ness . Clocks of a sort had been made , but Tycho Brahe found them so unreliable that he seldom used them , and many of his ...
... catalogues , his probable error in right ascension is only 24 " , 1 , and in declination only 25 " , 9 . ness . Clocks of a sort had been made , but Tycho Brahe found them so unreliable that he seldom used them , and many of his ...
Page 36
... catalogue all the principal stars , so that there should be no mistake in the future . During the construction of his catalogue of 1,000 stars he prepared and used accurate tables of refraction deduced from his own observations . Thus ...
... catalogue all the principal stars , so that there should be no mistake in the future . During the construction of his catalogue of 1,000 stars he prepared and used accurate tables of refraction deduced from his own observations . Thus ...
Page 67
... catalogue of stars . On January 1st , 1801 , he observed a star which had changed its place the next night . Its motion was retrograde till January 11th , direct after the 13th . Piazzi fell ill before he had enough observations for ...
... catalogue of stars . On January 1st , 1801 , he observed a star which had changed its place the next night . Its motion was retrograde till January 11th , direct after the 13th . Piazzi fell ill before he had enough observations for ...
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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 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