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 I 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 I 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.
... 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.
Page 95
... spots . They all did 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 ...
... spots . They all did 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 ...
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accurate observations Airy astro Astronomer Royal Astronomia Nova astronomical units attraction axis bright calculations Cape Cassini catalogue centre century comet compute Copernicus diameter discovered discovery earth eclipse epicycles equatoreal error excentric explain fact fixed stars Galileo Greenwich Halley heavenly bodies heavens heliometer Hipparchus Huggins hydrogen hypothesis instruments Johann Kepler John Herschel Jupiter Jupiter's Kepler Laplace Lick Observatory light line of apses line of sight lunar Mars mathematical mean distance mean motion measured Mercury meteor method miles a second moon moon's nebulæ Newton Observatory orbit parallax perihelion period photographic physical planet planetary pole position predicted proper motion proved Ptolemy R. S. Phil records refractor retrograde retrograde motion revolution revolve round ring rotation round the sun satellites seems showed Sirius solar system spectra spectroscope spectrum spots stellar sun-spots sun's surface supposed tables telescope theory tion Trans Tycho Brahe Uranus velocity Venus Verrier zenith