Fact

The Moon is drifting away from us

About 3.8 centimetres a year, and it is slowing Earth's spin as it goes.

1 min read

Tidal interaction transfers angular momentum from Earth’s rotation to the Moon’s orbit, pushing it outward and lengthening our day. Laser reflectors left by Apollo missions measure the recession precisely. Eventually total solar eclipses will become impossible – the Moon will appear too small to cover the Sun.

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