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nasa - What is this retroreflector on the Mars InSight lander used for? - Space Exploration Stack Exchange
![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_Fig3_HTML.png)
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 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
![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_Fig1_HTML.jpg)