This undated artist rendering provided by San Diego State University shows a planet, dubbed Kepler 1647 b, the small black dot at center, as it orbits two suns, designated Kepler-1647 A, the larger star, and Kepler 1647 B, outside our solar system. A team led by astronomers from NASA's Goddard Space Flight Center and San Diego State University reported Monday, June 13, 2016 the discovery of the largest planet to date that circles two suns.