When NASA’s Dawn spacecraft finally reached the giant asteroids Vesta and Ceres, scientists expected simple rocky worlds. Instead, the mission revealed mysterious bright spots, signs of icy eruptions, ...

If you were to ask a group of dedicated amateur astronomers to list their favorite telescopic targets, few if any would mention asteroids. That's easy to understand. The typical asteroid lacks the jaw ...

(PhysOrg.com) -- The car-sized asteroid that exploded above the Nubian Desert last October was small compared to the dinosaur-killing, civilization-ending objects that still orbit the sun. But that ...