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The Radius Cliff is a Waterfall: Explaining Sub-Neptune Exoplanets With Steam Worlds - Astrobiology

Summary by astrobiology.com
The demographics of Kepler planets provide a key testbed for models of planet formation and evolution, particularly for explaining the radius valley separating super-Earths and sub-Neptunes. A primordial interpretation based on differences in bulk densities — where rocky and water-rich planets form via migration pathways — offers an alternative to atmospheric loss scenarios. Updated interior […] The post The Radius Cliff is a Waterfall: Explaini…
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astrobiology.com broke the news in on Tuesday, February 17, 2026.
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