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Our own moon has been explored a number of times by both a rover and humans themselves. It is the most likely place for our first human settlement beyond Earth. Lunar soil contains water, and the moon itself is relatively close to home. The moon will be a launching pad for further human exploration of the cosmos.
The sixth largest moon of Saturn, Enceladus is a watery world covered by a 90 kilometer-thick layer of ice. Beneath that ice, there is more water than all of the Earth’s oceans combined! Within Enceladus’ oceans, there are erupting volcanoes that provide a potential energy source for life...
A moon of Jupiter with massive subsurface oceans, Europa is one of the most likely candidates for life in our solar system, and human habitation. This is due to the presence of large amounts of frozen water that cover the surface!
The largest moon of Saturn and the only moon in our solar system with a dense atmosphere. Titan is also the only other object in our Solar System that has bodies of liquid on its surface (not water!). Titan is a likely candidate for life in our solar system. That life, however, would be very different than any life on Earth.