MEXICO: Since last year, NASA researchers have suspected that at the south pole of Saturn moon Encledus was an ocean of liquid water. Now, new analysis of data captured by the Cassini space probe has them thinking the entire moon is covered in water sealed in by the crust.
By looking at seven years of images taken by Cassini, the researchers discovered a distinct wobble that the moon exhibits as it orbits Saturn.
To determine the source of the wobble, also called a “libration,” they considered different models, each assuming a different internal structure of the moon. The only one that made sense is the one that has Enceladus surrounded by an icy crust, beneath which lies a liquid ocean that completely covers a rocky core. It’s kind of a like a giant chocolate cherry where the cherry’s the core, the liquid surrounding it is the ocean and the crust is the chocolate.
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