![Buzz Aldrin](https://www.nasa.gov/wp-content/uploads/2023/03/apollo-astronaut-1041.jpg)
Retroreflectors: From Apollo to Mars
When Apollo 11 landed on the Moon, the crew brought devices with them called retroreflectors, which are essentially small arrays of mirrors.
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https://www.nasa.gov/image-detail/retroreflectors-from-apollo-mars/
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