Just three decades ago, scientists didn't know how old the universe was, that supermassive black holes lurk at the hearts of galaxies or that you could directly image planets around other stars. NASA's Hubble Space Telescope changed all that.
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.
