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American Focus > Blog > Tech and Science > Nearby Dwarf Planet Could Have a Crust That’s 90% Water : ScienceAlert
Tech and Science

Nearby Dwarf Planet Could Have a Crust That’s 90% Water : ScienceAlert

Last updated: October 6, 2024 1:48 pm
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Nearby Dwarf Planet Could Have a Crust That’s 90% Water : ScienceAlert
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Ceres: A Potential Frozen Ocean World Closer to Earth Than We Thought

A recent study suggests that Ceres, a dwarf planet located in the asteroid belt between Mars and Jupiter, may have a crust consisting of more than 90 percent water ice. This discovery could provide valuable insights into ocean worlds and what they look like when frozen over completely.

First discovered in 1801, Ceres is classified as a dwarf planet due to its size and spherical shape, making it just under half the size of Pluto. It stands out as the only dwarf planet closer to the Sun than Neptune and is known for its unique features, including bright spots that may indicate the presence of ice volcanoes on its surface.

Previous estimates of the amount of water ice on Ceres were limited to around 30 percent based on surface cratering observations. However, new research using data from NASA’s Dawn spacecraft and computer simulations suggests that the dwarf planet’s crust could be predominantly composed of water ice.

According to planetary geophysicist Mike Sori of Purdue University, the presence of a small amount of solid rock mixed into the ice could give it the structural integrity needed to maintain well-defined craters over long periods. This finding challenges previous assumptions about the behavior of icy surfaces on celestial bodies.

The study’s lead researcher, Ian Pamerleau, explains that even with the flow of solids over time, ice can maintain its integrity when combined with non-ice impurities. This discovery opens up new possibilities for understanding the composition of icy worlds like Ceres and their potential as frozen ocean worlds.

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With over 90 percent of its crust possibly consisting of water ice, Ceres could provide valuable insights into other icy ocean worlds in the Solar System, such as Europa and Enceladus. Unlike these moons, Ceres does not experience tidal heating from orbiting a planet, suggesting that any potential ocean it once had would have frozen completely.

As Sori suggests, Ceres may have been an ‘ocean world’ with a muddy ocean that froze over time, creating an icy crust with trapped rocky materials. This unique history makes Ceres an intriguing target for future spacecraft missions and a valuable point of comparison for studying icy moons in the outer Solar System.

The implications of this research extend beyond Ceres, offering new perspectives on the nature of ocean worlds and the potential for future exploration. With its accessible location and frozen ocean world status, Ceres presents a compelling opportunity for further scientific investigation.

The findings of this study have been published in Nature Astronomy, shedding light on the fascinating nature of this dwarf planet in our cosmic neighborhood.

TAGGED:CrustDwarfNearbyPlanetScienceAlertwater
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