The Geography of the Heavens and Class-book of Astronomy: Accompanied by a Celestial Atlas |
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Page 11
... equal arcs of 30 ° each , called signs , which the ancients distinguished by particular names . This division com- mences at the vernal equinox , and is continued eastwardly round to the same point again in the following order : Aries ...
... equal arcs of 30 ° each , called signs , which the ancients distinguished by particular names . This division com- mences at the vernal equinox , and is continued eastwardly round to the same point again in the following order : Aries ...
Page 12
... equal to the obliquity of the ecliptic , which , in round numbers , is 23c ° ; but , as we have seen , the obliquity of the ecliptic is continually changing ; therefore the position of the tropics must make a correspondent change . 14 ...
... equal to the obliquity of the ecliptic , which , in round numbers , is 23c ° ; but , as we have seen , the obliquity of the ecliptic is continually changing ; therefore the position of the tropics must make a correspondent change . 14 ...
Page 29
... equal parts , was both simple and ingenious . Having no instrument that would measure time exactly , " they took a vessel , with a small hole in the bottom , and having filled it with water , suffered the same to distill , drop by drop ...
... equal parts , was both simple and ingenious . Having no instrument that would measure time exactly , " they took a vessel , with a small hole in the bottom , and having filled it with water , suffered the same to distill , drop by drop ...
Page 34
... equal magnitude , forming a straight line W. of Baten ; from which , to the middle star is 10 ° , thence to the W. one 12 % ; and 8 ° or 9 ° S. of this line , in a triangular direction , is a bright star of the second magnitude in the ...
... equal magnitude , forming a straight line W. of Baten ; from which , to the middle star is 10 ° , thence to the W. one 12 % ; and 8 ° or 9 ° S. of this line , in a triangular direction , is a bright star of the second magnitude in the ...
Page 43
... equal parts , like a yard - stick ; thus serving as a graduated standard for measuring the distances of stars from each other . When , therefore , any star is described as being so many degrees from another , in order to determine the ...
... equal parts , like a yard - stick ; thus serving as a graduated standard for measuring the distances of stars from each other . When , therefore , any star is described as being so many degrees from another , in order to determine the ...
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Common terms and phrases
3d magnitude 4th magnitude angle aphelion appear Arcturus Aries astronomers Auriga axis Beta blue bright star called Cassiopeia celestial Cepheus circle cluster comet constellation Cor Caroli declination degree Delta Denebola diameter distant companion DOUBLE STAR Earth Earth's orbit east ecliptic equator equinoctial figure fixed stars Gamma head heavens hemisphere Herschel horizon Jupiter latitude light longitude luminous Map VIII mean distance Mercury meridian miles minutes Moon Moon's motion naked eye nearly NEBULA node north pole northern Number of stars o'clock observed Orion pale yellow parallax pass perihelion period planet Pleiades polar position principal star Refracting telescopes refraction remarkable represented revolution revolve right ascension rising satellites Saturn seen shadow sidereal Sirius situated small stars solstice southern Sun's supposed surface Taurus TELESCOPIC OBJECTS TELESCOPIC OBJECTS.-Alpha tides tion triangle TRIPLE STAR Ursa Ursa Major Venus vernal equinox visible Zeta Zodiac