Lunar laser ranging accurately measures the distance between an... | Download Scientific Diagram
File:Laser Ranging Retroreflector Apollo 15.svg - Wikipedia
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
The Apollo experiment that keeps on giving
Retroreflector, Laser Ranging, Lunar, Training | National Air and Space Museum
Apollo 11 and the Ann Arbor experiment that's still used on the moon today - mlive.com
How Do You Solve a Moon Mystery? Fire a Laser at It - The New York Times