Space.com: It's a collision of cosmic proportions: A video from the Hubble Space Telescope shows two chunks of material smashing together inside a jet of plasma emanating from a monster black hole.
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.
