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Graphics Interchange Format  |  2000-09-11  |  32KB  |  477x491  |  8-bit (256 colors)
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OCR: Rotation due North Point or earth spin celestia pole celestial sphere Positive direction of declination Observert Vernal Plane equinox direction Positive of formed observer right asccnsion nor zon Equa torial Tilt of equa torial plane plane for observer carth ascension horizon Eauatorial cquatorial