Fourteen Weeks in Descriptive Astronomy |
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Page 80
... 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 junctions of an inferior planet with the earth and sun 80 THE SOLAR SYSTEM .
... 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 junctions of an inferior planet with the earth and sun 80 THE SOLAR SYSTEM .
Page 81
Joel Dorman Steele. junctions of an inferior planet with the earth and sun is termed a synodic revolution . Were the earth at rest , there would be no difference between a sidereal and a synodic revolution , and the planet would come ...
Joel Dorman Steele. junctions of an inferior planet with the earth and sun is termed a synodic revolution . Were the earth at rest , there would be no difference between a sidereal and a synodic revolution , and the planet would come ...
Page 82
Joel Dorman Steele. PLANETS AS EVENING AND MORNING STARS . - The in- ferior planets are evening stars from superior to inferior conjunction , and the superior planets from opposition to conjunction . During the other half of their ...
Joel Dorman Steele. PLANETS AS EVENING AND MORNING STARS . - The in- ferior planets are evening stars from superior to inferior conjunction , and the superior planets from opposition to conjunction . During the other half of their ...
Page 85
... inferior or superior conjunction to the same again ( a synodic revolution ) requires 116 days . The reason of this ... planet to overtake us . DISTANCE FROM THE EARTH . - This varies still more than its distance from the sun . At inferior ...
... inferior or superior conjunction to the same again ( a synodic revolution ) requires 116 days . The reason of this ... planet to overtake us . DISTANCE FROM THE EARTH . - This varies still more than its distance from the sun . At inferior ...
Page 86
... planet may happen to be in aphe- lion or perihelion . If at inferior conjunction Mer- cury is in aphelion and the earth in perihelion , its distance from us is only 90,000,000 – 43,000,000 : 47,000,000 miles . If at superior conjunction ...
... planet may happen to be in aphe- lion or perihelion . If at inferior conjunction Mer- cury is in aphelion and the earth in perihelion , its distance from us is only 90,000,000 – 43,000,000 : 47,000,000 miles . If at superior conjunction ...
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Common terms and phrases
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