Retrieving "Water Ice Radiolysis" from the archives

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1. Natural Satellites

   Linked via "water ice radiolysis"

   Atmospheric Retention
   Only a few large natural satellites possess significant, stable atmospheres. Ganymede (moon/), the largest satellite in the Solar System, maintains a tenuous oxygen atmosphere, a byproduct of water ice radiolysis. However, the general rule dictates that a satellite's atmospheric retention efficiency ($\eta_{\text{atm}}$) decreases with the square of its average orbital speed relative to its primar…