Fourteen Weeks in Descriptive Astronomy |
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Page 109
... heavens . When the earth is in any part of the ecliptic , the sun seems to us to be in the point directly opposite . For example , when the earth is in Libra ( ~ ) * — autumnal equinox - the sun is in Aries ( Y ) -vernal equinox ; when ...
... heavens . When the earth is in any part of the ecliptic , the sun seems to us to be in the point directly opposite . For example , when the earth is in Libra ( ~ ) * — autumnal equinox - the sun is in Aries ( Y ) -vernal equinox ; when ...
Page 234
... heavens . The stars were at one time said to feed on air ; at another , to be the breathing holes of the universe . THREE ZONES OF STARS . - If we recall what was said on page 104 , concerning the paths of the stars and appearance of ...
... heavens . The stars were at one time said to feed on air ; at another , to be the breathing holes of the universe . THREE ZONES OF STARS . - If we recall what was said on page 104 , concerning the paths of the stars and appearance of ...
Page 322
... heavens ? Why do they appear smaller in the latter case ? 133. What causes the hazy appearance of the heavenly bodies near the horizon ? What is the cause of twilight ? How long does it last ? Is it the same at all seasons of the year ...
... heavens ? Why do they appear smaller in the latter case ? 133. What causes the hazy appearance of the heavenly bodies near the horizon ? What is the cause of twilight ? How long does it last ? Is it the same at all seasons of the year ...
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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