NASA Water Vapor Jupiter Moon Europa
Around forty years ago, a Voyager spacecraft captured the first closeup images of Europa, one of Jupiter’s 79 moons, revealing brownish cracks slicing the moon’s icy surface, which give it the look of a veiny eyeball. Missions in the decades since have gathered enough additional data about Europa to make it a high-priority target of investigation in NASA’s search for life. What sets this moon apart from the others is the possibility that it may possess all of the ingredients necessary for life.