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In page Timeline of Solar System astronomy:

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  • Late 2nd millennium BCE – Chinese astronomers record a solar eclipse during the reign of Zhong Kang, described as part of the document Punitive Expedition of Yin in the Book of Documents.[3]
  • Late 2nd millennium BCE – Chinese established their timing cycle of 12 Earthly Branches based on the approximate number of years (11.86) it takes Jupiter to complete a single revolution in the sky.[citation needed]
  • c. 1200 BCE – Earliest Babylonian star catalogues.[4]