Planetary scientist, NASA Jet Propulsion Laboratory
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Last updated Sep 8, 2026
As of September 2026: Led 2025 reanalysis of Titan's interior structure
Six moons in the outer solar system hide oceans of liquid water beneath frozen shells, with at least six more candidates. The evidence comes together in Maciej Cegłowski's essay 'Icy Moons Are Ocean Worlds,' which circulated on Hacker News on September 6.
Updated Sep 7
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