On July 14, NASA's New Horizons spacecraft will fly by Pluto. That will be among NASA's most impressive achievements to date — but what might come next?
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.
