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1 Jan 1021 Jahr - 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

By陸華白
12 Nov 2019
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1 Jan 1021 Jahr
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~ 1005 years ago
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