Fourteen Weeks in Descriptive Astronomy |
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Page 13
... night must be chosen when the air is clear , and the moon is absent . We then gaze upon a deep blue , an immense expanse studded with stars of varied color and brilliancy . Some shine with a vivid light , perpetually changing and ...
... night must be chosen when the air is clear , and the moon is absent . We then gaze upon a deep blue , an immense expanse studded with stars of varied color and brilliancy . Some shine with a vivid light , perpetually changing and ...
Page 17
... night under the open sky , could not fail to become familiar with many of the move- ments of the heavenly bodies . When Alexander took Babylon , in the year 331 в . c . , he found in that city a record of their observations reaching ...
... night under the open sky , could not fail to become familiar with many of the move- ments of the heavenly bodies . When Alexander took Babylon , in the year 331 в . c . , he found in that city a record of their observations reaching ...
Page 30
... night he noticed that those stars had changed their relative positions . Aston- ished and perplexed , he waited three days for a fair night in which to resume his observations . The fourth night was favorable , and he again found the ...
... night he noticed that those stars had changed their relative positions . Aston- ished and perplexed , he waited three days for a fair night in which to resume his observations . The fourth night was favorable , and he again found the ...
Page 36
... night . One half of the sphere is constantly visible to us ; and so far distant are the stars , that we see just as much of the sphere as we would if the upper part of the earth were removed , and we were to stand four thousand miles ...
... night . One half of the sphere is constantly visible to us ; and so far distant are the stars , that we see just as much of the sphere as we would if the upper part of the earth were removed , and we were to stand four thousand miles ...
Page 47
... night , at the rate of thirty miles an hour , would require 341 years to reach its desti- nation . Ten generations would be born and would die ; the young men would become gray - haired , and their great - grandchildren would forget the ...
... night , at the rate of thirty miles an hour , would require 341 years to reach its desti- nation . Ten generations would be born and would die ; the young men would become gray - haired , and their great - grandchildren would forget the ...
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Common terms and phrases
ancients Andromeda angle aphelion appearance Aries astronomers atmosphere axis body Boötes bright brilliant Canis Minor Capricornus Cassiopeia celestial centre Cepheus circle color comet conjunction constellation Cor Caroli dark density Describe diameter disk Draco earth east ecliptic equal equator equinoctial figure fixed stars full moon globe heat heavens Hercules Herschel horizon inclined inferior inferior conjunction inferior planet Jupiter latitude length light lunar Lyra magnitude Mars mean distance Mercury meridian meteors miles moon moon's motion move naked eye nearly nebula Neptune node north pole orbit Orion parallax pass path penumbra perihelion Perseus Pisces planet Polaris precession rays revolve ring rising Saturn seasons seen shadow shines shower sidereal sidereal day solar day solar system space spots summer sun's superior planet surface synodic revolution tance Taurus telescope theory tion Uranus Ursa Major Ursa Minor varies velocity Venus vernal equinox visible zodiac