16. Unreliable Technology • Earth.com 16. Unreliable Technology

But there’s one machine up there that’s in perfect working order. The Laser Ranging Retroreflector is a device that uses a set of mirrors to reflect laser pulses from Earth. This device has helped scientists measure the exact distance between Earth and the moon. The retroreflector’s big advantage is that it is really just mirrors, so it doesn’t require any power. Photo Credit:

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