NASA has a plan to protect humanity from facing the fate as dinosaurs... Asteroid Prevention! Is this legit or is this straight out of a Michael Bay movie? The DART mission, set to launch November 23, 2021, at 10:20 PST, will arrive at asteroid Didymos and its moonlet Didymos B in late September or early October 2022. Scientists plan to crash it into Didymos B to see how much the moonlet moves, as practice for dealing with potential future dangerous space rock encounters.