The discovery of a trio of jumbo black holes circling the center of a distant galaxy, reported by astronomers on Wednesday, suggests that pairs or triplets of such monsters may be surprisingly common.
The supermassive black hole is 40 million times as massive as the sun and powers a quasar that existed 700 million years after the Big Bang.
The asteroid zoomed by Earth at a perfectly safe distance of around 1.8 million miles (2.9 kilometers).
Images show surprise changes to the spacecraft as it interacted with the atmosphere.
