Fourteen Weeks in Descriptive Astronomy |
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Page 90
... Venus . This happened last in February , 1862. A less degree of brilliancy is attained once in twenty - nine months , under somewhat the same circumstances . MOTION IN SPACE . - Unlike Mercury , Venus has an orbit the most circular of ...
... Venus . This happened last in February , 1862. A less degree of brilliancy is attained once in twenty - nine months , under somewhat the same circumstances . MOTION IN SPACE . - Unlike Mercury , Venus has an orbit the most circular of ...
Page 93
... Venus is very much in- clined from a perpendicular , its seasons are similar to those of Mercury . The torrid and temperate Fig . 25 Plane of the rotation Axis of Planets ... VENUS AT ITS SOLSTICE . CRESCENT AND 8POTS OF VENUS . VENUS . 93.
... Venus is very much in- clined from a perpendicular , its seasons are similar to those of Mercury . The torrid and temperate Fig . 25 Plane of the rotation Axis of Planets ... VENUS AT ITS SOLSTICE . CRESCENT AND 8POTS OF VENUS . VENUS . 93.
Page 95
... Venus , the evenings , like ours , are lighted by twilight , and the mornings by dawn . ( 2. ) The edge of the enlightened portion of the planet is un- even and irregular . This appearance is ... VENUS . THE EARTH IN SPACE . VENUS . 95.
... Venus , the evenings , like ours , are lighted by twilight , and the mornings by dawn . ( 2. ) The edge of the enlightened portion of the planet is un- even and irregular . This appearance is ... VENUS . THE EARTH IN SPACE . VENUS . 95.
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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