History of Astronomy |
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Page 55
... surface in space , exactly as the axis of a top describes a cone , if the top has a sharp point , and is set spinning and displaced from the vertical . He actually calculated the amount ; and so he explained the cause of the precession ...
... surface in space , exactly as the axis of a top describes a cone , if the top has a sharp point , and is set spinning and displaced from the vertical . He actually calculated the amount ; and so he explained the cause of the precession ...
Page 82
... surface of mercury . The design was so simple , and seemed so perfect , that great expectations were entertained . But unaccountable variations comparable with those of the transit circle appeared , and the instrument was put out of use ...
... surface of mercury . The design was so simple , and seemed so perfect , that great expectations were entertained . But unaccountable variations comparable with those of the transit circle appeared , and the instrument was put out of use ...
Page 95
... SURFACE , They all did Scheiner was the first to see the spots . good work . The spots were found to be ever varying in size and shape . Sometimes , when a spot disappears at the western limb of the sun , it is never seen again . In ...
... SURFACE , They all did Scheiner was the first to see the spots . good work . The spots were found to be ever varying in size and shape . Sometimes , when a spot disappears at the western limb of the sun , it is never seen again . In ...
Page 96
... surface . Speculations as to the cause of sun - spots have never ceased from Galileo's time to ours . He supposed them to be clouds . Scheiner said they were the indications of tumultuous movements occasionally agitating the ocean of ...
... surface . Speculations as to the cause of sun - spots have never ceased from Galileo's time to ours . He supposed them to be clouds . Scheiner said they were the indications of tumultuous movements occasionally agitating the ocean of ...
Page 97
... surface , and , after many years of work , arrived at a law of frequency which has been more fruitful of results than any discovery in solar physics . In 1843 he announced a decennial period of maxima and minima of sun - spot displays ...
... surface , and , after many years of work , arrived at a law of frequency which has been more fruitful of results than any discovery in solar physics . In 1843 he announced a decennial period of maxima and minima of sun - spot displays ...
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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