This artist's concept obtained October 30, 2018 courtesy of NASA/Ames/JPL-Caltech/T. Pyle, shows Kepler-16b, the first planet around a double-star system, - After nine years in deep space collecting data that indicate our sky to be filled with billions of hidden planets, NASA's Kepler space telescope has run out of fuel needed for further science operations. NASA has decided on October 30, 2018 to retire the spacecraft within its current, safe orbit, away from Earth. Kepler leaves a legacy of more than 2,600 planet discoveries from outside our solar system, many of which could be promising places for life. (Photo by NASA/JPL-Caltech/T. Pyle / NASA/Ames/JPL-Caltech / AFP)