FILE PHOTO: A NASA astronaut is seen as the Earth’s surface passes by in the background on the International Space Station, in this handout photo taken February 21, 2015, provided by NASA. REUTERS/NASA/Handout/File Photo
FILE PHOTO: A NASA astronaut is seen as the Earth’s surface passes by in the background on the International Space Station, in this handout photo taken February 21, 2015, provided by NASA. REUTERS/NASA/Handout/File Photo