TED Fellow and Astrophysicist Lucianne Walkowicz studies the faces of stars to learn the inner workings of their hearts. In this fascinating TED talk, she shares some of the astounding findings of NASA’s Kepler mission, which searches for new planetary systems in far-off space. “In just over two years of operations, we’ve found over 1,200 potential new planetary systems around other stars,” she says. “To give you some perspective, in the previous two decades of searching, we had only known about 400, prior to Kepler.”