historia toistua Tremble laser reflectors Täsmällisyys Kuluttaa ennakkoluulo
continuous wave green laser propagates through Stock Footage Video (100% Royalty-free) 12736358 | Shutterstock
First two-way laser ranging to a lunar orbiter: infrared observations from the Grasse station to LRO's retro-reflector array | Earth, Planets and Space | Full Text