Forty years ago, a Voyager spacecraft snapped the first closeup images of Europa, one of Jupiter’s 79 moons. These revealed brownish cracks slicing the moon’s icy surface, which give Europa the look of a veiny eyeball. Missions to the outer solar system in the decades since have amassed enough additional information about Europa to make it a high-priority target of investigation in NASA’s search for life.
![](https://scx1.b-cdn.net/csz/news/tmb/2019/11-nasascientis.jpg)
Source:
https://phys.org/news/2019-11-nasa-scientists-vapor-europa.html