Spin Kick
Last year, NASA rammed its Double Asteroid Redirection Test (DART) spacecraft into a tiny moonlet called Dimorphos, demonstrating a promising way to redirect a potential incoming killer asteroid to save life on Earth.Now, given the huge amount of scrutiny following the collision, scientists have made another surprising discovery: Dimorphos' much larger companion Didymos is spinning so fast, they say, that it's capable of shooting pieces of rubble into space, a puzzling conclusion that highlights the fact that asteroids aren't necessarily the inert lumps of rock they're often thought of, Scientific American reports.