Two NASA astronauts are safely back inside the International Space Station today (Feb. 20) after successfully completing the first of three scheduled spacewalks planned to prep the outpost for the arrivals of commercial spacecraft carrying astronauts in the coming years.
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.
