History of Astronomy |
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Page 2
... spots ; while De la Rue , Loewy , and Balfour Stewart ' thought they found a connection between sun - spot displays and the planetary ' Trans . R. S. E. , xxiii . 1864 , p . 499 , On Sun Spots , etc. , by B. Stewart . Also Trans . R. S. ...
... spots ; while De la Rue , Loewy , and Balfour Stewart ' thought they found a connection between sun - spot displays and the planetary ' Trans . R. S. E. , xxiii . 1864 , p . 499 , On Sun Spots , etc. , by B. Stewart . Also Trans . R. S. ...
Page 13
... spots on the heavenly vault , but solids ; that the moon derives her light from the sun , and that this fact explains her phases ; that an eclipse of the moon happens when the earth cuts off the sun's light from her . He supposed the ...
... spots on the heavenly vault , but solids ; that the moon derives her light from the sun , and that this fact explains her phases ; that an eclipse of the moon happens when the earth cuts off the sun's light from her . He supposed the ...
Page 47
... 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.
... 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 94
... most striking discoveries , when he pointed his telescope to the heavenly bodies , was that of the irregularly shaped spots on the sun , with the dark central umbra and the less dark , but more 94 THE PHYSICAL PERIOD THE SUN ยท
... most striking discoveries , when he pointed his telescope to the heavenly bodies , was that of the irregularly shaped spots on the sun , with the dark central umbra and the less dark , but more 94 THE PHYSICAL PERIOD THE SUN ยท
Page 95
... 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 other cases , after a fortnight , it reappears at 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 other cases , after a fortnight , it reappears at the ...
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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