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Physics, 14.10.2020 01:01 loveuncondition
In 1969 the Apollo astronauts left a laser reflector on the Moon. This was to be used to help scientists to make very accurate measurements of the distance between the Earth and the Moon. The mean distance between the centres of the Earth and Moon is 385 000 km, and light travels at 3 × 10⁸ m/s.
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In 1969 the Apollo astronauts left a laser reflector on the Moon. This was to be used to help scient...
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