Tue Oct 08 00:03:19 UTC 2024: ## Ceres: A Frozen Ocean World Hiding Beneath Its Cratered Surface
**New research reveals that the dwarf planet Ceres, the largest object in the asteroid belt, is far icier than previously thought, potentially having once been a “muddy ocean world.”** This discovery challenges long-held beliefs about the composition of Ceres, which was thought to have a relatively low ice content due to its heavily cratered surface.
Using computer simulations, scientists from Purdue University and NASA’s Jet Propulsion Lab have determined that Ceres’ crust likely contains about 90% ice near its surface, significantly higher than the previously estimated 30%. This ice, mixed with small amounts of solid rock, is incredibly strong, preventing the craters from relaxing and smoothing out over time, as was initially expected.
The research suggests that Ceres was once a “muddy ocean world,” similar to Jupiter’s moon Europa, but with a twist. As this ocean froze, it left behind an icy crust with traces of rocky material, making Ceres potentially more similar to the icy moons of our outer solar system than previously thought.
**This discovery has important implications for future space missions.** Ceres is relatively accessible compared to other icy bodies in our solar system, making it an ideal target for exploration. Studying the bright features on Ceres’ surface, which are believed to be remnants of its ancient ocean, could provide valuable insights into the composition and evolution of other icy bodies.
“We have a frozen ocean world pretty close to Earth,” said Mike Sori, assistant professor at Purdue University. “Ceres may be a valuable point of comparison for the ocean-hosting icy moons of the outer solar system.”
The study, published in Nature Astronomy, is a significant step forward in our understanding of Ceres and its place in the history of our solar system.
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