Fourteen Weeks in Descriptive Astronomy |
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Page 45
... , so vast as to overcome the attraction of all the planets , and compel them to circle around him ; next , the planets , each turning on its axis while it flies around the sun in an elliptical orbit ; then , accompanying these.
... , so vast as to overcome the attraction of all the planets , and compel them to circle around him ; next , the planets , each turning on its axis while it flies around the sun in an elliptical orbit ; then , accompanying these.
Page 54
... axis . - These changes can be accounted for only on the supposition that the sun revolves on its axis indeed , they are the precise effects which the laws of perspective demand in that case.About twenty - seven. 54 THE SOLAR SYSTEM .
... axis . - These changes can be accounted for only on the supposition that the sun revolves on its axis indeed , they are the precise effects which the laws of perspective demand in that case.About twenty - seven. 54 THE SOLAR SYSTEM .
Page 56
... axis is inclined to the ecliptic ( 7 ° 15 ' ) . The spots have a motion of their own . - Besides the motion already named as assigned to the sun's rota- tion , the spots seem to have a motion of their own , and this fact is undoubtedly ...
... axis is inclined to the ecliptic ( 7 ° 15 ' ) . The spots have a motion of their own . - Besides the motion already named as assigned to the sun's rota- tion , the spots seem to have a motion of their own , and this fact is undoubtedly ...
Page 57
... axis . A spot near the equator Fig . 10 . CYCLONE . performs a synodic revolution in about twenty - five days , while one half way to either pole requires twenty - eight days . One spot was noticed which had a motion three times greater ...
... axis . A spot near the equator Fig . 10 . CYCLONE . performs a synodic revolution in about twenty - five days , while one half way to either pole requires twenty - eight days . One spot was noticed which had a motion three times greater ...
Page 63
... axis brings a spot nearer and nearer to the centre , thus giving us a more direct view of the opening , we can see more and more of the dark body . Then as it passes by the centre the nucleus will disappear , until finally we can see ...
... axis brings a spot nearer and nearer to the centre , thus giving us a more direct view of the opening , we can see more and more of the dark body . Then as it passes by the centre the nucleus will disappear , until finally we can see ...
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ancients Andromeda angle aphelion appear Aries astronomers atmosphere axis Boötes bright brilliant Canis Minor Capricornus Cassiopeia cause Celestial Sphere centre Cepheus circle color comet conjunction constellation Cor Caroli dark density Describe diameter disk earth east ecliptic equal equator equinoctial figure fixed stars full moon globe heat heavenly bodies heavens Hercules Herschel horizon inclined inferior conjunction inferior planet Jupiter latitude length light luminous lunar Lyra magnitude Mars mean distance Mercury meridian meteors miles moon's motion move naked eye nearly nebula Neptune night node north pole Orion parallax pass path penumbra perihelion Perseus Pisces polar Polaris precession rays revolve ring rising Saturn seasons seen shine side sidereal sidereal day solar day solar system solstice space spots summer sun's surface synodic revolution tance Taurus telescope theory tion Uranus Ursa Major Ursa Minor varies velocity Venus vernal equinox visible winter Zodiac