Things can be a little cramped when stuffed inside a spacecraft. Not only are your crewmates taking up room, but toss in supplies and lots of gear for good measure!
And if you're headed for Mars, elbow room may be at a premium for such a long voyage. The good news is that living and working in microgravity does create opportunities for astronauts to expand their environment because they are not constrained by being bound to a "floor."
But NASA has yet to map how astronauts take advantage of weightlessness to expand the useable area of their vehicles.
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.
