Mirror, mirror, on the Moon, how far away are you?

MoonLIGHT or Moon Laser Instrumentation for General relativity/geophysics High-accuracy Tests is seeking the answer to this and more questions on general relativity, the gravitational dynamics of the Earth-Moon system and the deep lunar interior.

MoonLIGHT is a laser retroreflector, imaged here, which allows laser beams sent from Earth to be …

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