Before drifting off the sleep tonight aboard the International Space Station, astronaut Scott Kelly (@stationcdrkelly) posted this image and wrote, 'Day 287. Another week done with a flash of #lightning. #GoodNight 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
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