NASA's New Planet Hunter Begins Its Search for Alien Worlds

NASA's new planet-hunting space telescope has started work. TESS follows in the footsteps of NASA's iconic Kepler telescope, which in the course of two missions has identified 2,650 confirmed exoplanets, according to the space agency. Like Kepler, TESS will look for tiny dips in the brightness of individual stars caused by a planet passing between its star and the telescope in its orbit.