Last month, Elon Musk detailed his plans to take humans to Mars within the decade. However, he remained relatively quiet about how he plans to keep them fit and healthy once they're there.
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.