Applied Physics Laboratory engineer (and Andy's old college roommate) Dipak Srinivasan returns to the podcast to talk about his work on the Mercury MESSENGER mission, the Pluto New Horizons flyby (that'll also soon be visiting Kuiper belt object 2014 MU69), and most importantly, the upcoming Parker Solar Probe and a mission to Jupiter's moon Europa, the most likely place in our solar system to find extraterrestrial life.