Water is abundant in our solar system. Besides Earth, scientists have found evidence for subsurface lakes on Mars and a growing number of subsurface oceans on small icy moons in the outer solar system. It seems reasonable, then, that water might exist on planets and moons in other solar systems. But what about rogue planets, free-floating worlds that don’t orbit a star? A June 2021 study from astrophysicists at Ludwig-Maximilians Universität München in Germany focused on the possibility of liquid water on exomoons of rogue planets. The intriguing results show that moons of rogue planets should indeed be able to possess an atmosphere and retain liquid water.
The peer-reviewed findings in the International Journal of Astrobiology published this study on June 8, 2021.
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