Geodetic astronomy
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Spherical astronomy
Miguel Itzigsohn
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Jean Meeus
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Spherical trigonometry
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Al-Khwarizmi
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Benjamin Baillaud
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Observational astronomy
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Spherical geometry
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Conjunction (astronomy)
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Apparent retrograde motion
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Eudoxus of Cnidus
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Equatorial coordinate system
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Celestial sphere
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Euclid
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Analog computer
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Astrometry
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Positional astronomy
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