最終更新日：2024/07/30
The Maunder Minimum was a period of low sunspot activity in the 17th century.
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The Maunder Minimum was a period of low sunspot activity in the 17th century.
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The Maunder Minimum was a period of low sunspot activity in the 17th century.
The Maunder Minimum was a period of low sunspot activity in the 17th century.
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