With a cracked, ridge-ridden, salty crust of ice, very few craters and a string, shifting magnetic field, Jupiter's moon Europa seems to be telling scientists it has a whole lot of ocean just under its surface. Galileo (Europa's discoverer) would be, well, amazed. NASA's Jet Propulsion Laboratory made this entertaining video.
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.
