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The Moon is gradually moving away from the Earth, at a rate of about 4 cm per year. This is caused by a transfer of Earth's rotational momentum to the Moon's orbital momentum as tidal friction also slows the Earth's rotation. So the Earth's day will get longer and the month will also lengthen. However, the tidal locking of the Earth and Moon (day and month both 47 days long) would take several billion years, and during that time the Sun is expected to expand, which would likely disrupt the process.

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15y ago

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