Hydrogen Atmospheres Could Sustain Liquid Water on Exomoons Around Rogue Planets for Up to 4.3 Billion Years

To the point

David Dahlbüdding and colleagues propose that exomoons orbiting rogue planets could remain warm enough for liquid water for about 4.3 billion years thanks to a thick hydrogen atmosphere and tidal heating, offering a long window for life to emerge even when the host planet itself is not habitable.

Moons Around Rogue Planets Could Have The Conditions to Support Life
sciencealert.com

Moons Around Rogue Planets Could Have The Conditions to Support Life

Planets drifting unmoored through interstellar space, with no star to call home, may still have moons that are warm enough to support life, a new study has found.