Fourteen Weeks in Descriptive Astronomy |
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Page 80
... SIDEREAL AND 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 ...
... SIDEREAL AND 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 ...
Page 81
... sidereal and a synodic revolution , and the planet would come into conjunction twice in each revolution . Since , however , the earth is in motion , it follows that after the planet has completed its sidereal revolution , it must then ...
... sidereal and a synodic revolution , and the planet would come into conjunction twice in each revolution . Since , however , the earth is in motion , it follows that after the planet has completed its sidereal revolution , it must then ...
Page 85
... sidereal revolu- tion around the sun in 88 days , yet to pass from one inferior or superior conjunction to the same again ( a synodic revolution ) requires 116 days . The reason of this is , as already explained , that when Mercury ...
... sidereal revolu- tion around the sun in 88 days , yet to pass from one inferior or superior conjunction to the same again ( a synodic revolution ) requires 116 days . The reason of this is , as already explained , that when Mercury ...
Page 91
... sidereal revolu- tion , as it would appear to an observer at the sun , but a synodic revolution is 584 days . Mercury , we remember , catches up with the earth in 28 days after it reaches the point where it left the earth at the last ...
... sidereal revolu- tion , as it would appear to an observer at the sun , but a synodic revolution is 584 days . Mercury , we remember , catches up with the earth in 28 days after it reaches the point where it left the earth at the last ...
Page 140
... - pletes its revolution ( sidereal ) around the earth in about 27 days ; but , as the earth is constantly pass- Fig . 14 AUG . 15 JULY . • S 16 JUNE 17 MAY The real path of the moon is the result of. 140 THE SOLAR SYSTEM .
... - pletes its revolution ( sidereal ) around the earth in about 27 days ; but , as the earth is constantly pass- Fig . 14 AUG . 15 JULY . • S 16 JUNE 17 MAY The real path of the moon is the result of. 140 THE SOLAR SYSTEM .
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Common terms and phrases
ancients Andromeda angle aphelion appearance Aries astronomers atmosphere axis body Boötes bright brilliant Canis Minor Capricornus Cassiopeia celestial centre Cepheus circle color comet conjunction constellation Cor Caroli dark density Describe diameter disk Draco earth east ecliptic equal equator equinoctial figure fixed stars full moon globe heat heavens Hercules Herschel horizon inclined inferior inferior conjunction inferior planet Jupiter latitude length light lunar Lyra magnitude Mars mean distance Mercury meridian meteors miles moon moon's motion move naked eye nearly nebula Neptune node north pole orbit Orion parallax pass path penumbra perihelion Perseus Pisces planet Polaris precession rays revolve ring rising Saturn seasons seen shadow shines shower sidereal sidereal day solar day solar system space spots summer sun's superior planet surface synodic revolution tance Taurus telescope theory tion Uranus Ursa Major Ursa Minor varies velocity Venus vernal equinox visible zodiac