WEBVTT FILE 1 00:00:00.000 --> 00:00:02.202 [music throughout] Europa is one of the largest moons of Jupiter, 2 00:00:02.202 --> 00:00:05.672 and we believe that Europa has a subsurface ocean 3 00:00:05.672 --> 00:00:08.375 tens to hundreds of kilometers thick. 4 00:00:08.375 --> 00:00:13.847 And so this ocean may be one of the best places to search for life in the Solar System. 5 00:00:13.847 --> 00:00:17.717 There’s been three space missions that have provided evidence 6 00:00:17.717 --> 00:00:20.353 for Europa harboring liquid water. 7 00:00:20.353 --> 00:00:23.356 The first one is Voyager in the late 70s, 8 00:00:23.356 --> 00:00:27.494 the second one is the Galileo Mission in the late 90s, 9 00:00:27.494 --> 00:00:31.965 and most recently Hubble which detected plume-like emission from 10 00:00:31.965 --> 00:00:38.104 hydrogen and oxygen which is closely related to the existence of water beneath its surface.