Watch SpaceX launch NASA’s new planet-hunting satellite here

It's almost time for SpaceX to launch NASA's TESS, a space telescope that will search for exoplants more across nearly the entire night sky. The launch has been delayed more than once already: originally scheduled for March 20, it slipped to April 16 (Monday), then some minor issues pushed it to today — at 3:51 PM Pacific time, to be precise.