Dust filled the early solar system, swirling together to form clumps, rocks, and eventually planets. Today the dust has cleared and the planets have been resurfaced by weather and other forces. But the rocks are still out there, and this year, two spacecraft got a close up look at these relics of our earliest days. Japan’s Hayabusa 2 explored the asteroid Ryugu, literally shooting it with a bullet and catching the debris. It also noted that the rock looked oddly clean, and may actually be an amalgamation of two asteroids. Hayabusa 2 recently departed Ryugu to bring its samples back to Earth. Not wanting to be left out of the asteroid action, NASA’s OSIRIS-REx spacecraft reached Bennu after a two-year voyage. The probe has discovered that the asteroid spits out small pebbles—unusual behavior for a supposedly inert space rock—and is preparing to collect a sample.