Fourteen Weeks in Descriptive Astronomy |
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Page 37
... circle where the earth and sky seem to meet ; it is parallel to the rational horizon , but distant from it the semi ... circle and the Meridian . A vertical circle is one passing through the poles of the horizon ( the zenith and nadir ) ...
... circle where the earth and sky seem to meet ; it is parallel to the rational horizon , but distant from it the semi ... circle and the Meridian . A vertical circle is one passing through the poles of the horizon ( the zenith and nadir ) ...
Page 38
... CIRCLE is the Equinoctial . This is the Celestial Equator , or the earth's equator , ex- tended to the Celestial Sphere . ( b ) SUBORDINATE CIRCLES . - These are the Hour Circles ( Right Ascension Meridians ) and the Decli- nation ...
... CIRCLE is the Equinoctial . This is the Celestial Equator , or the earth's equator , ex- tended to the Celestial Sphere . ( b ) SUBORDINATE CIRCLES . - These are the Hour Circles ( Right Ascension Meridians ) and the Decli- nation ...
Page 291
... circle , leaving it just high enough to allow the extreme end of its shadow to fall upon the circle about 9 or 10 A. M. Mark this point , and also the place where the shadow touches the circle in the afternoon . Take a point half - way ...
... circle , leaving it just high enough to allow the extreme end of its shadow to fall upon the circle about 9 or 10 A. M. Mark this point , and also the place where the shadow touches the circle in the afternoon . Take a point half - way ...
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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