Before drifting off to tonight, astronaut Scott Kelly (stationcdrkelly) aboard the International Space Station posted this image and wrote, "Day 179. The #Nile at night is a beautiful sight for these sore eyes. Good night from ISS! #YearInSpace." Kelly is living and working off the Earth, for the Earth aboard the station for a yearlong mission. Traveling the world about 250 miles above the Earth, and at 17,500 mph, he circumnavigates the globe more than a dozen times a day. Image Credit: NASA #nasa #space #iss #spacestation #earth