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 ...

The seven retroreflectors placed on the Moon's surface will bounce photons back to you if you have a laser powerful enough. It's the 56th anniversary of Apollo 11 landing on the Moon today, and pretty ...

Click to open image viewer. The Laser Ranging Retroreflector is a device that reflects light so that the paths of the reflected rays are parallel to those of the incident rays. Instruments placed on ...