Ten days after its launch, Astrobotic’s Peregrine lunar lander fell back to Earth today, ending a trip to the moon’s orbital distance and back that was doomed by a propellant leak. The mission began auspiciously on the night of Oct. 7-8 with a seemingly successful liftoff from Florida on United Launch Alliance’s first Vulcan Centaur rocket, powered by Blue Origin’s BE-4 rocket engines. But hours after launch, the Pittsburgh-based Astrobotic team detected a problem with the propulsion system. So
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