When Superintendent Steve Bradshaw first received a threatening text message in mid-September, he didn't know it was coming from a hacker trying to exploit his Montana school district.
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.