Thanks for the Laser Ranging link.
Current accuracy 1.1 mm.
Amazing.
There was some scientific study using those lasers, showing that the moon was vibrating back & forth as if it had been knocked off its trajectory. Someone did the math and it went back to some date maybe 600 years ago. They found a reference to some monks who looked at the moon one night and saw a massive explosion. That was against dogma because the heavens were supposed to be immutable or somesuch sumthin sumthin. Sure enough, there’s a 600 year old crater on the moon corresponding to when a very large asteroid hit it.