Wednesday, June 21, 2006

Moons of Saturn

Another cool movie has been released by NASA. This one is of three moons of Saturn as viewed by the Cassini spacecraft.

The center (and largest) moon is Rhea, and it is the closest. Further away is Mimas, the moon on top, and even further away (yet larger in size than the top moon)is Enceladus. Check out the link to see the movie in motion and learn more about it.

Fun fact: Enceladus (the bottom moon) has been discovered to have sub-surface liquid water beneath its icy crust. The fact that this water sometimes escapes the surface (cryovolcanism) provides water molecules into the space surrounding the moon, and these water molecules become ionized by sunlight and travel through Saturn's magnetosphere. What an amazing system!

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