The Geography of the Heavens and Class-book of Astronomy: Accompanied by a Celestial Atlas |
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Page 10
... Equinoctial , is the great circle formed on the concave surface of the heavens , by producing the plane of the Earth's equator . A plane is that which has surface but not thickness . The plane of a circle is that ima- ginary superficies ...
... Equinoctial , is the great circle formed on the concave surface of the heavens , by producing the plane of the Earth's equator . A plane is that which has surface but not thickness . The plane of a circle is that ima- ginary superficies ...
Page 11
... Equinoctial , a little obliquely , in two oppo- site points , which are called the Equinoxes . The Sun rises in one of these points on the 21st of March ; this point is called the Vernal Equinox . It sets in the opposite point on the ...
... Equinoctial , a little obliquely , in two oppo- site points , which are called the Equinoxes . The Sun rises in one of these points on the 21st of March ; this point is called the Vernal Equinox . It sets in the opposite point on the ...
Page 12
... equinoctial , and parallel to it ; or they may be considered as circles formed by producing the parallels of latitude to the heavens . 13. The Tropic of Cancer is a small circle , which lies 231 ° north of the Equinoctial , and parallel ...
... equinoctial , and parallel to it ; or they may be considered as circles formed by producing the parallels of latitude to the heavens . 13. The Tropic of Cancer is a small circle , which lies 231 ° north of the Equinoctial , and parallel ...
Page 13
... equinoctial , and that great meridian which passes through the first point of Aries , called the equinoctial colure . 17. Latitude on the Earth , is distance north or south of the equator , and is measured on the meridian . Latitude in ...
... equinoctial , and that great meridian which passes through the first point of Aries , called the equinoctial colure . 17. Latitude on the Earth , is distance north or south of the equator , and is measured on the meridian . Latitude in ...
Page 14
... equinoctial and parallel to it , are called Parallels of Declination . Those which are drawn up and down through the maps , at intervals of 15 ° , are called Meridians of Right Ascension , or Hour Circles . The scale at the top and ...
... equinoctial and parallel to it , are called Parallels of Declination . Those which are drawn up and down through the maps , at intervals of 15 ° , are called Meridians of Right Ascension , or Hour Circles . The scale at the top and ...
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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