Declination

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In astronomy, declination (abbreviatit dec; seembol δ) is ane o the twa angles that locate a pynt on the celestial sphere in the equatorial coordinate seestem, the ither bein oor angle. Declination's angle is measured north or south o the celestial equator, alang the oor circle passin through the pynt in question.[1]

Richt ascension an declination as seen on the inside o the celestial sphere. The primary direction o the seestem is the vernal equinox, the ascendin node o the ecliptic (reid) on the celestial equator (blue). Declination is measured northward or soothward frae the celestial equator, alang the oor circle passin through the pynt in question.

The ruit o wird the declination (Laitin, declinatio) means "a bendin away" or "a bendin doun". It comes frae the same ruit as the wirds incline ("bend taeward") an recline ("bend backward").[2]

References[eedit | eedit soorce]

  1. U.S. Naval Observatory, Nautical Almanac Office (1992). P. Kenneth Seidelmann, ed. Explanatory Supplement to the Astronomical Almanac. University Science Books, Mill Valley, CA. p. 724. ISBN 0-935702-68-7. 
  2. Barclay, James (1799). A Complete and Universal English Dictionary. , entries for declination, inclination, incline, recline, at Google books