Yesterday, NASA announced that astronaut Scott Kelly will retire from the space agency as of April 1st. Kelly holds the U.S. record for the most time spent in space.
For nearly a full year, he zoomed along at 17,500 miles per hour — orbiting 230 miles above earth — on the International Space Station. And for those million or so of us who follow him on Twitter, Cmdr. Kelly's year in space gave us a mind-expanding view of planet Earth.
Kelly posted spectacular photos — awesome, in the true sense of the word. He called them, earth-art.