Apr 182018
SpaceX has launched the TESS (Transiting Exoplanet Survey Satellite) planet-hunter satellite and recovered the first stage booster on a recovery barge out at sea. TESS will be put into an unconventional orbit with a perigee of 108,000 km and an apogee of 375,000 km. if it works, it should find a *lot* of exoplanets, around the order of 20,000 of them.
Note: When I first entered college, there were *nine* known planets. There are currently 3800 or so. There may soon be 24,000 or so.