A Soviet robot lost on the dusty plains of the Moon for the past40 years has been found again
What sort of surface accuracy do these corner reflectors have? Why is
there no degradation by the constant in-fall of high velocity space
dust, micro-meteorites, etc in an atmosphere free environment? The
incident surface must surely face "upwards" to some degree and cannot,
by definition, be protected. (or there would be no access)
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