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A picture of Earth and the Moon from Mars. The presence of the Moon (which has about 1/81 the mass of Earth), is slowing Earth's rotation and extending the day by a little under 2 milliseconds every 100 years.

潮汐加速と地球・月系のダイナミクス回転速度と軌道の変化

潮汐加速潮汐ブレーキ地球の自転月の軌道
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A picture of Earth and the Moon from Mars. The presence of the Moon (which has about 1/81 the mass of Earth), is slowing Earth's rotation and extending the day by a little under 2 milliseconds every 100 years.

潮汐加速と地球・月系のダイナミクス回転の鈍化と軌道の変化

潮汐加速潮汐ブレーキ地球の自転月の公転
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