Fourteen Weeks in Descriptive Astronomy |
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Page 55
... rotation is about twenty- five days ( 25 d . , 8 h . , 10 m .: Langier . ) X b S SYNODIC AND SIDEREAL REVOLUTION . X Synodic and sidereal revolution of the spots . - We can easily understand why we make an allowance for the motion of ...
... rotation is about twenty- five days ( 25 d . , 8 h . , 10 m .: Langier . ) X b S SYNODIC AND SIDEREAL REVOLUTION . X Synodic and sidereal revolution of the spots . - We can easily understand why we make an allowance for the motion of ...
Page 56
... revolution . To do this requires , as we have said , about two days . A revolution from a around to a ' is called a synodic , and one from a around to a again is called a sidereal revolution . The spots apparently do not always move in ...
... revolution . To do this requires , as we have said , about two days . A revolution from a around to a ' is called a synodic , and one from a around to a again is called a sidereal revolution . The spots apparently do not always move in ...
Page 57
... synodic revolution in about twenty - five days , while one half way to either pole requires twenty - eight days ... rotation and sudden changes in the spots . At other times , however , the spots seem to set sail and move across the disk ...
... synodic revolution in about twenty - five days , while one half way to either pole requires twenty - eight days ... rotation and sudden changes in the spots . At other times , however , the spots seem to set sail and move across the disk ...
Page 80
... SYNODIC REVOLUTION . - The interval of time required by a planet to perform a revolution from one fixed star back to it again , is termed a sidereal revolution ( sidus , a star ) . 1. The interval of time between two similar con- m לן ...
... SYNODIC REVOLUTION . - The interval of time required by a planet to perform a revolution from one fixed star back to it again , is termed a sidereal revolution ( sidus , a star ) . 1. The interval of time between two similar con- m לן ...
Page 81
... synodic revolution . Were the earth at rest , there would be no difference between a sidereal and a synodic revolution , and the planet would come into conjunction twice in each revolution . Since , however , the earth is in motion , it ...
... synodic revolution . Were the earth at rest , there would be no difference between a sidereal and a synodic revolution , and the planet would come into conjunction twice in each revolution . Since , however , the earth is in motion , it ...
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ancients Andromeda angle aphelion appear Aries astronomers atmosphere axis Boötes bright brilliant Canis Minor Capricornus Cassiopeia cause Celestial Sphere centre Cepheus circle color comet conjunction constellation Cor Caroli dark density Describe diameter disk earth east ecliptic equal equator equinoctial figure fixed stars full moon globe heat heavenly bodies heavens Hercules Herschel horizon inclined inferior conjunction inferior planet Jupiter latitude length light luminous lunar Lyra magnitude Mars mean distance Mercury meridian meteors miles moon's motion move naked eye nearly nebula Neptune night node north pole Orion parallax pass path penumbra perihelion Perseus Pisces polar Polaris precession rays revolve ring rising Saturn seasons seen shine side sidereal sidereal day solar day solar system solstice space spots summer sun's surface synodic revolution tance Taurus telescope theory tion Uranus Ursa Major Ursa Minor varies velocity Venus vernal equinox visible winter Zodiac