![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 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](https://media.springernature.com/lw685/springer-static/image/art%3A10.1186%2Fs40623-020-01243-w/MediaObjects/40623_2020_1243_Figa_HTML.jpg)
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
NASA History - On this day (May 4) in 1976, NASA launched LAser GEOdynamics Satellite-1 (LAGEOS), a dense laser retroreflector satellite. The two-foot diameter, 900-pound satellite orbited the Earth from pole to
![The Apollo 15 Lunar Laser Ranging Retroreflector - A Fundamental Point on the Moon! | Lunar Reconnaissance Orbiter Camera The Apollo 15 Lunar Laser Ranging Retroreflector - A Fundamental Point on the Moon! | Lunar Reconnaissance Orbiter Camera](http://lroc.sese.asu.edu/news/uploads/LROCiotw/M111578606LE_thumb1.png)