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jan 1, 1021 - 1021年– 伊本·海瑟姆（Ibn al-Haytham，Alhazen）寫到大氣的折射現象，即早晚暮光的起因。

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氣象學歷史

12 Nov 2019

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jan 1, 1021

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~ 1006 years ago

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