Fourteen Weeks in Descriptive Astronomy |
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Page 85
... tion around the sun in 88 days , yet to pass from one inferior or superior conjunction to the same again ( a synodic revolution ) requires 116 days . The reason of this is , as already explained , that when Mercury comes around to the ...
... tion around the sun in 88 days , yet to pass from one inferior or superior conjunction to the same again ( a synodic revolution ) requires 116 days . The reason of this is , as already explained , that when Mercury comes around to the ...
Page 128
... tion of the earth in its orbit due to precession , the line connecting the aphelion and perihelion points of the orbit itself is slowly moving . The conse- quence of this is a variation in the length of the seasons at different periods ...
... tion of the earth in its orbit due to precession , the line connecting the aphelion and perihelion points of the orbit itself is slowly moving . The conse- quence of this is a variation in the length of the seasons at different periods ...
Page 176
... tion of the sun would be insufficient to bring him back from its extreme limit , and the huge un- wieldy planet would plunge headlong into space . This careful fitting , whereby the plan is always modified to accomplish an end , is ...
... tion of the sun would be insufficient to bring him back from its extreme limit , and the huge un- wieldy planet would plunge headlong into space . This careful fitting , whereby the plan is always modified to accomplish an end , is ...
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Common terms and phrases
ancients angle aphelion appear astronomers atmosphere axis bright brilliant called Capricornus Cassiopeia Celestial Sphere centre circle color comet conjunction constellation Cor Caroli dark density diameter disk earth east ecliptic equal equator equinoctial figure fixed stars full moon globe heat heavenly bodies heavens Hercules Herschel horizon inclined inferior inferior conjunction inferior planet Jupiter latitude length light longitude luminous lunar magnitude Mars mean distance measured Mercury meridian meteors miles moon moon's motion move naked eye nearly nebula Neptune night node north pole obliquity observer orbit parallax pass path penumbra perihelion Perseus planet polar position rays revolve Right Ascension ring rotation satellites Saturn seasons seen shadow shine side sidereal sidereal day solar system space spots summer sun's superior planet supposed surface synodic revolution tance Taurus telescope theory tion Uranus Ursa Major varies velocity Venus vernal equinox visible zenith zodiac