 The declination of a star is its angular distance north or south of the celestial equator, measured along the hour circle through the star. Its right ascension is the angular distance along the celestial equator, from a fixed point called the vernal equinox...  Understanding Variable Stars - Pagina 17di John R. Percy - 2007 - 350 pagineAnteprima limitata - Informazioni su questo libro
 | Charles Winthrop Crockett - 1896 - 318 pagine
...ascension of a star is the angular distance along the equator from a certain point on the equator, called the vernal equinox, to the foot of the hour circle through the star, measured towards the east ; or it is the angle at the pole between the hour circle of the vernal equinox... | |
 | Henry Curwen Lord - 1904 - 168 pagine
...from the vernal equinox to the meridian. A star's right ascension is also defined as the distance from the vernal equinox to the foot of the hour circle through the star. Obviously, therefore, a star's right ascension may be defined as the sidereal time when it is on the... | |
 | U.S. Coast and Geodetic Survey, Daniel Lyman Hazard, W. N. McFarland - 1937 - 72 pagine
...through the star. Its right ascension is the angular distance along the celestial equator, from a fixed point called the vernal equinox to the foot of the hour circle through the star. Because of the relative motion of the star and the solar system, and the precession and nutation of... | |
 | U.S. Coast and Geodetic Survey, Samuel Asher Deel - 1946 - 96 pagine
...17 1 the star. Its right ascension is the angular distance along the celestial equator, from a fixed point called the vernal equinox to the foot of the hour circle through the star. Because of the relative motion of the star and the solar system, and the precession and nutation of... | |
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