Why Is the Apollo Reflector Experiment Still Operating, 50 Years Later?

July 22, 2019

An epic lunar laser experiment is still going strong, five decades after the Apollo astronauts set it up on the surface. The moonwalking crew of Apollo 11, which landed on the moon 50 years ago this month, put special retroreflectors on the lunar surface, as did the later crews of Apollo 14 and 15, in 1971.