High-school AstronomySheldon & Company, 1872 |
From inside the book
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Page 12
... called , after its author , the Ptolemaic Theory . PTOLEMAIC THEORY OF THE STRUCTURE OF THE UNIVERSE . 1. Ptolemy supposed the earth to be in the center of a system of crystalline arches , or hollow spheres , arranged one within the ...
... called , after its author , the Ptolemaic Theory . PTOLEMAIC THEORY OF THE STRUCTURE OF THE UNIVERSE . 1. Ptolemy supposed the earth to be in the center of a system of crystalline arches , or hollow spheres , arranged one within the ...
Page 13
... called , after him , the Copernican System . 1. The investigations of Copernicus were conducted between the years 1507 and 1530 . In the latter year he finished his tables of the planets , and his great work , The Revolu tion of the ...
... called , after him , the Copernican System . 1. The investigations of Copernicus were conducted between the years 1507 and 1530 . In the latter year he finished his tables of the planets , and his great work , The Revolu tion of the ...
Page 14
... called the dry land earth , and the gathering together of the waters called he seas . " - Genesis i . 2 , 9. 10. Up to this time there was no " earth , " either as continents or islands , neither were there any " seas , " but all the ...
... called the dry land earth , and the gathering together of the waters called he seas . " - Genesis i . 2 , 9. 10. Up to this time there was no " earth , " either as continents or islands , neither were there any " seas , " but all the ...
Page 16
... called a plane , to extend off beyond the plane surfaco as far as we please ; or , in other words , to be indefinitely extended . When a plane or line is extended in this way , it is sail to be producer . 2. An imaginary plane may exist ...
... called a plane , to extend off beyond the plane surfaco as far as we please ; or , in other words , to be indefinitely extended . When a plane or line is extended in this way , it is sail to be producer . 2. An imaginary plane may exist ...
Page 17
... called its center . This is the ordinary definition ; but in Astronomy , the term is applied to the apparent concave of the heavens , as if it were the actual concave surface of a hollow sphere . CONCAVE B A SPHERE . dicular ? Inclined ...
... called its center . This is the ordinary definition ; but in Astronomy , the term is applied to the apparent concave of the heavens , as if it were the actual concave surface of a hollow sphere . CONCAVE B A SPHERE . dicular ? Inclined ...
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Common terms and phrases
angle angular aphelion apparent magnitude appear Asteroids astronomers atmosphere attraction axis bodies called cause celestial Celestial Longitude circle comets concave constellations diameter difference direction disk distance earth earth's orbit east eastward ecliptic equator equinoctial equinox exterior planets figure fixed stars full moon globe heavens hemisphere Illustrate by diagram inclination Jupiter length libration light and heat longitude lunar Mars Mercury meridian minutes moon moon's orbit motion naked eye nearly nebulous Neptune nodes o'clock objects observations opposite pass perihelion planetary planets pole principal stars Prof refracting telescope refraction Remark represent respect retrograde revolve right ascension rings satellites Saturn seasons seen shadow shown side sidereal revolution solar day solar eclipse solar system sphere spots student sun and moon sun's supposed surface symbol synodic revolution tails telescope tide-wave tides tion transit Uranus velocity Venus vernal equinox visible zodiac zodiacal light
Popular passages
Page 168 - He telleth the number of the stars, and calleth them all by their names.
Page 10 - And God said, Let there be lights in the firmament of the heaven to divide the day from the night; and let them be for signs, and for seasons, and for days, and years: And let them be for lights in the firmament of the heaven to give light upon the earth: and it was so.
Page 173 - Canst thou bind the sweet influences of Pleiades, or loose the bands of Orion? Canst thou bring forth Mazzaroth in his season? or canst thou guide Arcturus with his sons?
Page 10 - And God made two great lights; the greater light to rule the day, and the lesser light to rule the night: he made the stars also.
Page 170 - Lo, these are parts of his ways; but how little a portion is heard of him? but the thunder of his power who can understand?
Page 200 - ... thousand stars, compacted and wedged together in a round space, whose angular diameter does not exceed eight or ten minutes; that is to say, in an area not more than a tenth part of that covered by the moon.
Page 66 - The inclination of the Earth's axis to the plane of the ecliptic causes the equinoctial to depart 23° 28
Page 21 - A Circle is a plane figure bounded by a curved line every point of which is equally distant from a point within called the center.