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Home Enceladus is an icy world much like Hoth, except that it may have an ocean under its frozen crust. Astronomers believe this moon of Saturn may be a good candidate for having extraterrestrial life beneath its surface. (NASA) Enceladus is an icy world much like Hoth, except that it may have an ocean under its frozen crust. Astronomers believe this moon of Saturn may be a good candidate for having extraterrestrial life beneath its surface. (NASA)

Enceladus is an icy world much like Hoth, except that it may have an ocean under its frozen crust. Astronomers believe this moon of Saturn may be a good candidate for having extraterrestrial life beneath its surface. (NASA)

Enceladus is an icy world much like Hoth, except that it may have an ocean under its frozen crust. Astronomers believe this moon of Saturn may be a good candidate for having extraterrestrial life beneath its surface. (NASA)

Enceladus is an icy world much like Hoth, except that it may have an ocean under its frozen crust. Astronomers believe this moon of Saturn may be a good candidate for having extraterrestrial life beneath its surface. (NASA)

Light and color would look different on a planet orbiting a tiny red star, like this artist’s impression of Proxima b. The Earth-sized planet in the habitable zone is the nearest exoplanet to our sun. (ESO/M. Kornmesser)
Obi-Wan Kenobi’s ship lands on the ocean world of Kamino in “Star Wars: Attack of the Clones.” In our galaxy, Kepler-22b could be a super-Earth with a super ocean. (Disney/Lucasfilm Ltd. & TM.)