Europa, a moon of Jupiter
Jupiter has a moon to, its named Europa. Jupiter’s moon Europa has been subject to speculation about the existence of life due to the strong possibility of a liquid water ocean beneath its ice surface. The case for life on Europa was greatly enhanced in 2011 when it was discovered that vast lakes exist within Europa’s thick, icy shell. Scientists found that ice shelves surrounding the lakes appear to be collapsing into them, thereby providing a mechanism through which life-forming chemicals created in sunlit areas on Europa’s surface could be transferred to its interior. On 11 December 2013, NASA reported the detection of “clay-like minerals”, often associated with organic materials, on the icy crust of Europa. The presence of the minerals may have been the result of a collision with an asteroid or comet according to the scientists. The Europa Multiple-Flyby Mission, which would assess the habitability of Europa, is planned for launch in 2025. Europa’s subsurface ocean is considered the best target for the discovery of life.
Enceladus, a moon of Saturn
Enceladus, a moon of Saturn, has some of the conditions of life, including geothermal activity and water vapor, as well as possible under-ice oceans heated by tidal effects. The Cassini-Huygens probe detected carbon, hydrogen, nitrogen and oxygen, those are all key elements for supporting life. During its 2005 flyby through one of Enceladus’s geysers spewing ice and gas. the temperature and density of the plumes indicate a warmer, watery source beneath the surface. Titan the largest moon of Saturn, is the only known moon in the Solar System with a significant atmosphere. Data from the Cassini-Huygens mission refuted the hypothesis of a global hydrocarbon ocean, but later demonstrated the existence of liquid hydrocarbon lakes in the polar regions.
A video about alien sightings
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Sources: www.wikipedia.com and www.youtube.com