Fourteen Weeks in Descriptive Astronomy |
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Page 78
Joel Dorman Steele. ward in the order of the signs ; and to an observer at the sun , such would have been its motion . Phases of an inferior planet . — An inferior planet presents all the phases of the moon . At superior conjunction ...
Joel Dorman Steele. ward in the order of the signs ; and to an observer at the sun , such would have been its motion . Phases of an inferior planet . — An inferior planet presents all the phases of the moon . At superior conjunction ...
Page 91
... 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 inferior conjunction . But it takes Venus nearly ...
... 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 inferior conjunction . But it takes Venus nearly ...
Page 92
... observers have noticed the entire contour of the planet to be of a dull gray hue , as seen in the cut . DIMENSIONS . - Venus is about 7,500 miles in diame- ter . The volume of the planet is about four - fifths that of the earth , while ...
... observers have noticed the entire contour of the planet to be of a dull gray hue , as seen in the cut . DIMENSIONS . - Venus is about 7,500 miles in diame- ter . The volume of the planet is about four - fifths that of the earth , while ...
Page 131
... observer at C. He sees the sun , not in the direction of the curved line CBAS , but that of the straight line CBS . The amount of refraction varies with the tempera- ture , moisture , and other conditions of the atmos- phere . It is ...
... observer at C. He sees the sun , not in the direction of the curved line CBAS , but that of the straight line CBS . The amount of refraction varies with the tempera- ture , moisture , and other conditions of the atmos- phere . It is ...
Page 138
... observer at O , as well as one at R , would see the star Z directly overhead ; and ( 2 ) , that the nearer a body is to the earth the greater its parallax becomes . It has been agreed by astronomers , for the sake of uniformity in their ...
... observer at O , as well as one at R , would see the star Z directly overhead ; and ( 2 ) , that the nearer a body is to the earth the greater its parallax becomes . It has been agreed by astronomers , for the sake of uniformity in their ...
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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