Colonize Mars? Meh. While some space enthusiasts are vying for a chance to create a human colony on the Red Planet, others say exoplanets like "Kepler-22b" and "Gliese 667Cc" may be more suitable for life -- human or alien, that is.
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.
