Cosmology
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Callippus
Callippic cycle
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Meton of Athens
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Calippus (crater)
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List of ancient Greeks
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Celestial spheres
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Concentric spheres
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Giovanni Schiaparelli
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Antikythera mechanism
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Axial precession
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Timeline of cosmological theories
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Eudoxus of Cnidus
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Averroes
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Universe
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Metonic cycle
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Julian calendar
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History of astronomy
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Hipparchus
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Calippus of Cyzicus
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Callippus of Cyzicus
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