Titan (Saturn)  Titan is the largest moon of Saturn. It is the only moon known to have a dense atmosphere, and the only object in space other than Earth where clear evidence of stable bodies of surface liquid has been found. Titan is the sixth gravitationally rounded moon from Saturn. Frequently described as a planet-like moon

Titan pictured from the Cassini spacecraft

Enceladus (Saturn)  -  Top candidate for life. Plumes of vapor are emerging from Enceladus contain large amounts of molecular hydrogen. More importantly, this hydrogen seems to be the product of hydrothermal activity in the moon’s ocean…and is a strong hint that the moon has conditions favorable to microbial life. Thick crust of ice cover the whole surface with liquid ocean beneath.

Enceladus (Saturn) - Top candidate for life. Plumes of vapor are emerging from Enceladus contain large amounts of molecular hydrogen. More importantly, this hydrogen seems to be the product of hydrothermal activity in the moon’s ocean…and is a strong hint that the moon has conditions favorable to microbial life. Thick crust of ice cover the whole surface with liquid ocean beneath.

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