Fourteen Weeks in Descriptive Astronomy |
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Page 64
... heat . Changes of temperature take place , which give rise to tornadoes and violent tempests . Descending currents pro- duce openings filled with clouds , which appear as black spots on the sun's disk . A cloud once formed becomes a ...
... heat . Changes of temperature take place , which give rise to tornadoes and violent tempests . Descending currents pro- duce openings filled with clouds , which appear as black spots on the sun's disk . A cloud once formed becomes a ...
Page 65
... heat , feeds this great central fire . Were Mercury to strike the sun in this way , it would generate sufficient heat to compensate the loss by radiation for seven years . Many suppose that the heat of the sun is gradually diminishing ...
... heat , feeds this great central fire . Were Mercury to strike the sun in this way , it would generate sufficient heat to compensate the loss by radiation for seven years . Many suppose that the heat of the sun is gradually diminishing ...
Page 117
... heat and cold not at the solstices.- We notice that we do not have our greatest heat at the time of the summer solstice , nor our greatest cold at the winter solstice . After the 21st of June , the earth , already warmed by the genial ...
... heat and cold not at the solstices.- We notice that we do not have our greatest heat at the time of the summer solstice , nor our greatest cold at the winter solstice . After the 21st of June , the earth , already warmed by the genial ...
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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