The Geography of the Heavens: And Class-book of Astronomy; Accompanied by a Celestial Atlas |
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Page 27
... called the Nadir . Vertical Circles are circles drawn through the Zenith and Nadir of any place , cutting the ... called the Equinoxes . The Sun rises in one of these points on the 21st of March ; this point is called the Vernal Equinox ...
... called the Nadir . Vertical Circles are circles drawn through the Zenith and Nadir of any place , cutting the ... called the Equinoxes . The Sun rises in one of these points on the 21st of March ; this point is called the Vernal Equinox ...
Page 28
... called the Sum- mer Solstice ; and that point in the ecliptic which touches the tropic of Capricorn , is called the Winter Solstice . The distance of these two points from the equinoctial , is always equal to the obliquity of the ...
... called the Sum- mer Solstice ; and that point in the ecliptic which touches the tropic of Capricorn , is called the Winter Solstice . The distance of these two points from the equinoctial , is always equal to the obliquity of the ...
Page 29
... called the equinoc . tial colure . Latitude on the Earth , is distance north or south of the equator , and is measured on a meridian . Latitude in the Heavens , is distance north or south of the ecliptic , and at right angles with it ...
... called the equinoc . tial colure . Latitude on the Earth , is distance north or south of the equator , and is measured on a meridian . Latitude in the Heavens , is distance north or south of the ecliptic , and at right angles with it ...
Page 31
... 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 bottom of the first four maps , and in ...
... 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 bottom of the first four maps , and in ...
Page 35
... called Merach , Mu and Nu . About 20 from Nu at the northwestern extremity of the girdle , is a remarkable nebula of very minute stars , and the only one of the kind which is ever visible to the naked eye . It resembles two cones of ...
... called Merach , Mu and Nu . About 20 from Nu at the northwestern extremity of the girdle , is a remarkable nebula of very minute stars , and the only one of the kind which is ever visible to the naked eye . It resembles two cones of ...
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Common terms and phrases
3d magnitude 4th magnitude ancient angle appear Arcturus Argo Navis Aries astronomers Auriga axis Beta brightest called Cassiopeia celestial centre Cepheus circle cluster colure comet constellation Cor Caroli declination degree Delta Denebola diameter direction distinguished diurnal motion Earth east ecliptic equal equator equinoctial figure fixed stars Gamma globe head heavenly bodies heavens Hercules Herschel horizon Jupiter latitude length Libra light longitude Mars mean distance Mercury meridian millions of miles minutes Moon Moon's motion naked eye nearly nebula night node north pole northern hemisphere o'clock observed orbit Orion parallax passing perihelion period Perseus phenomena planets Pleiades polar star principal star represented revolution revolve right ascension rise satellites Saturn seasons seen side sidereal Sirius situated small stars solar system solstice southern spots square Sun's supposed surface Taurus telescope tion triangle Ursa Venus vernal equinox Virgo visible whole number Zeta Zodiac