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Water Group Exospheres and Surface Interactions on the Moon, Mercury, and Ceres

Li, Shuai; Wöhler, Christian; Berezhnoy, Alexey A. +7 more

Water ice, abundant in the outer solar system, is volatile in the inner solar system. On the largest airless bodies of the inner solar system (Mercury, the Moon, Ceres), water can be an exospheric species but also occurs in its condensed form. Mercury hosts water ice deposits in permanently shadowed regions near its poles that act as cold traps. W…