Fourteen Weeks in Descriptive Astronomy |
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Page 41
... Vernal Equinox . The place where the sun crosses the equinoctial in going South , which occurs about the 21st of September , is called the Autumnal Equinox . The Solstices are the two points of the ecliptic most distant from the Equator ...
... Vernal Equinox . The place where the sun crosses the equinoctial in going South , which occurs about the 21st of September , is called the Autumnal Equinox . The Solstices are the two points of the ecliptic most distant from the Equator ...
Page 116
... vernal equinox . He is overhead at the equator , and the days and nights are again equal . It is our spring , but in the south temperate zone it is autumn . XII . The yearly path finished . — The earth moves on in its orbit through the ...
... vernal equinox . He is overhead at the equator , and the days and nights are again equal . It is our spring , but in the south temperate zone it is autumn . XII . The yearly path finished . — The earth moves on in its orbit through the ...
Page 118
... vernal equinox to aphelion , the attraction of the sun tends to check its speed ; from that point to the autumnal equinox , the at- traction is partly in the direction of its motion , and so increases its velocity . The same principle ...
... vernal equinox to aphelion , the attraction of the sun tends to check its speed ; from that point to the autumnal equinox , the at- traction is partly in the direction of its motion , and so increases its velocity . The same principle ...
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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