Astronomical Applications Department, U.S. Naval Observatory
19218Astronomical Applications Department, U.S. Naval Observatoryhttp://aa.usno.navy.mil/Computes the position, brightness, and other observable characteristics of celestial bodies, as well as the circumstances of astronomical phenomena. Includes information on calendars and related topics.AstronomyMar 16, 2008
Show universe in terms of distance from Earth center. Includes such things as satellites, planets, stars, nebulae, and galaxies, out to cosmic microwave background radiation from the Big Bang.
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