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Date: 2007-03-09 19:08:54Amateur Astronomers Association of Pittsburgh Time scales Celestia Sidereal time StarQuest Online Robert J. Vanderbei Mohawk Valley Astronomical Society Moon Sun Software Astronomy Measurement | Add to Reading ListSource URL: www.princetonastronomy.orgDownload Document from Source WebsiteFile Size: 663,59 KBShare Document on Facebook |