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1 Jan 1621 Jahr - Kepler: Heliocentric; used Brahe's data, based on Copernicus' model, to solve Mars' Retrograde motion and developed Kepler's laws of planetary motion.

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Astronomy History

By陈瀚可 Koke Cacao

7 Nov 2019

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1 Jan 1621 Jahr

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~ 405 years ago

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