The spots indicate that there is some kind of geological process underway. They can not be made of pure ice because at the distance that Ceres del Sol is, the ice is unstable and sublimates in a short time. It was concluded that they were salt deposits. But what kind? First it was thought that they were accumulations of magnesium sulfate, but then it was determined that they were made of sodium carbonate. If so, how were they formed? As always, the truth is turning out to be much more complex than previously thought.

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