Fourteen Weeks in Descriptive Astronomy |
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Page 75
... seen from the centre of the sun , is called its heliocentric place ; as seen from the centre of the earth , its geocentric place . When Venus is at inferior conjunction , an observer at the sun would see it in the opposite part of the ...
... seen from the centre of the sun , is called its heliocentric place ; as seen from the centre of the earth , its geocentric place . When Venus is at inferior conjunction , an observer at the sun would see it in the opposite part of the ...
Page 138
... seen from the two eyes is parallax . In astronomical calculations , the position of a body as seen from the earth's surface is called its apparent place , while that in which it would be seen from the centre of the earth is called its ...
... seen from the two eyes is parallax . In astronomical calculations , the position of a body as seen from the earth's surface is called its apparent place , while that in which it would be seen from the centre of the earth is called its ...
Page 139
... seen from the body . In the figure , the parallax of the star S is the angle OSR , which is measured by the line OR - the semi - diam- eter of the earth . The sun's horizontal parallax ( 8.94 " ) is the angle subtended ( measured ) by ...
... seen from the body . In the figure , the parallax of the star S is the angle OSR , which is measured by the line OR - the semi - diam- eter of the earth . The sun's horizontal parallax ( 8.94 " ) is the angle subtended ( measured ) by ...
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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