The Department of Energy’s Oak Ridge National Laboratory has produced 50 grams of the energy source for NASA and other missions. The laboratory's project lead Bob Wham, explains how it was processed.
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.
