On Monday, April 16th, NASA is scheduled to launch its newest exoplanet hunter: the Transiting Exoplanet Survey Satellite (TESS). What’s special about TESS? For one, it’s the first ever spaceborne transit survey that will observe the whole sky. During its two-year survey mission, TESS will look at more than 200,000 of our brightest neighboring stars to hunt for planets ranging from Earth-sized to gas giants. In this episode of Gravity Assist, Jim Green talks with Martin Still, the TESS Program Scientist, about how TESS works and how it will help us discover new worlds.