Enlarge / The Hayabusa2 spacecraft spies its shadow as it descended toward Ryugu to deploy two small rovers. (credit: JAXA) Early on Sunday morning, the skies above a secluded military complex in central Australia will be brightened by a fireball plummeting to Earth. It will be a flamboyant homecoming for the sample return capsule from Hayabusa2, a Japanese spacecraft launched almost exactly six years ago on a mission to shoot an ancient asteroid and steal some of its dirt.