Queqiao retroreflector
![Queqiao retroreflector](https://planetary.s3.amazonaws.com/web/assets/pictures/_768x310_crop_center-center_60_line/113601/20190207_laser-retro-reflector-queqiao-JDSE-schematic-prototype2.jpg 768w, https://planetary.s3.amazonaws.com/web/assets/pictures/_576x233_crop_center-center_60_line/113601/20190207_laser-retro-reflector-queqiao-JDSE-schematic-prototype2.jpg 576w)
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