#drifting

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The moon is drifting away from Earth by about 3.8 centimetres a year — measured to the millimetre by bouncing laser light off mirrors the Apollo astronauts left sitting in the lunar dust more than half a century ago

The corner-cube reflectors Buzz Aldrin, Alan Shepard and David Scott left on the Moon between 1969 and 1971 are still returning laser pulses fired from Earth — and 57 years of measurements show our ne...