Rio Scale is a way for common man to check the legitmacy of the next "Alien Spotted" headline. Recently the scale was updated to account for changing media.
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.