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Nasa's Resource Prospector was a robotic rover that was intended to be the first mission to mine the surface of the moon.
The robot, developed by Nasa over the course of a decade, was designed to search for volatile compounds like hydrogen, oxygen and water.
It was expected to launch in 2022 and form part of US President Donald Trump's December 2017 directive ordering Nasa to return astronauts to the moon for the first time since 1972.