Fourteen Weeks in Descriptive Astronomy |
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Page 69
... magnitude of the planetary system . Choose a level field or common ; on it place a globe two feet in diameter for the Sun : Vulcan will then be represented by a small pin's head , at a distance of about 27 feet from the centre of the ...
... magnitude of the planetary system . Choose a level field or common ; on it place a globe two feet in diameter for the Sun : Vulcan will then be represented by a small pin's head , at a distance of about 27 feet from the centre of the ...
Page 142
... magnitude . The esti mates will differ from a small saucer to a wash - tub . LIBRATIONS ( librans , swinging ) .— While the moou presents the same hemisphere to us , there are three causes which enable us to see about 576 out of the ...
... magnitude . The esti mates will differ from a small saucer to a wash - tub . LIBRATIONS ( librans , swinging ) .— While the moou presents the same hemisphere to us , there are three causes which enable us to see about 576 out of the ...
Page 143
... magnitude , but nearly thirty - three miles beyond , and that the lighter half is toward us . If that be so , this side is equivalent to a mountain of that enormous height . We can easily see that if water and air exist upon the moon ...
... magnitude , but nearly thirty - three miles beyond , and that the lighter half is toward us . If that be so , this side is equivalent to a mountain of that enormous height . We can easily see that if water and air exist upon the moon ...
Page 237
... magnitude . Principal stars . - A cluster of seven stars forms what is termed the " Little Dipper . " Three of them are small , and are seen with difficulty . Polaris , at the extremity of the handle , has been known from time ...
... magnitude . Principal stars . - A cluster of seven stars forms what is termed the " Little Dipper . " Three of them are small , and are seen with difficulty . Polaris , at the extremity of the handle , has been known from time ...
Page 239
... magnitude which is scarcely visible , marks the end of the nose ; several scattered groups and deli- cate triangles of small stars , denote the position of the various coils of the body ; thence , an irregular line of stars traces the ...
... magnitude which is scarcely visible , marks the end of the nose ; several scattered groups and deli- cate triangles of small stars , denote the position of the various coils of the body ; thence , an irregular line of stars traces the ...
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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