Rogue-Planet Exomoons: Tidal Heating and Thick Hydrogen Atmospheres Could Sustain Liquid Water for Billions of Years
To the point
David Dahlbüdding and collaborators show that moons around rogue planets could keep liquid surface water for long periods through tidal heating from their giant host planet and thick hydrogen atmospheres that trap heat, making them plausible habitats without a nearby star.
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