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In page Timeline of Solar System astronomy:

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  • c. 1200 BCE – Earliest Babylonian star catalogues.[4]
  • c. 1100 BCE – Chinese first determine the spring equinox.[citation needed]
  • c. 750 BCE – During the reign of Nabonassar (747–733 BC), the systematic records of ominous phenomena in Babylonian astronomical diaries that began at this time allowed for the discovery of a repeating 18-year cycle of lunar eclipses.[5]