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An Exotic State Between Liquid And Gas: Exoplanets With Strange Water

Much of the cosmos remains a mystery to this day, and as we learn more about our universe, the stranger it becomes. A study last month in the Astrophysical Journal Letters reports that some planets have water in an exotic state between liquid and gas.

Olivier Mousis, a planetary scientist at Aix-Marseille University in France, and colleagues ran simulations of ocean-covered worlds in close orbits around their stars, where mini-Neptunes are often found. Intense stellar radiation would cause water on the planets to puff up into a diffuse layer of “supercritical” water between liquid and gas, topped by a steamy water vapor atmosphere, the team found. On Earth, supercritical water can be used to break down toxic waste.
Such extreme [sauna-like] worlds could bridge the divide between rocky and gaseous planet types…

(Image Credit: NASA / JPL / Voyager-ISS / Justin Cowart/ Wikimedia Commons)

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