Fourteen Weeks in Descriptive Astronomy |
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Page 109
... 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 the sun enters 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 the sun enters the ...
Page 139
... earth's semi - diameter as seen from that luminary . As the moon is nearest the earth , its horizontal par- allax is the greatest of any of the heavenly bodies . Annual Parallax . - The fixed stars are so distant from the earth that ...
... earth's semi - diameter as seen from that luminary . As the moon is nearest the earth , its horizontal par- allax is the greatest of any of the heavenly bodies . Annual Parallax . - The fixed stars are so distant from the earth that ...
Page 320
... EARTH . - Sign ? What is the appearance of the earth from the other planets ? Do we , then , live on a star ? Is it probable that the earth was always dark and dull as it now seems to us ? How does the size of the earth compare with ...
... EARTH . - Sign ? What is the appearance of the earth from the other planets ? Do we , then , live on a star ? Is it probable that the earth was always dark and dull as it now seems to us ? How does the size of the earth compare with ...
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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