Recently postulated to have a salt-water ocean underneath its crusty surface, the Hubble Space Telescope has found ozone around this body.  Its largest crater is called Galileo Regio and is surrounded by parallel grooves and ridges called sulci.  Though it is associated with another man, it was actually discovered by Simon Marius.  Larger than both Mercury and Pluto, it is theorized to have been pulled into a slightly elliptical orbit by the neighboring moon Callisto.  F
Recently postulated to have a salt-water ocean underneath its crusty surface, the Hubble Space Telescope has found ozone around this body.  Its largest crater is called Galileo Regio and is surrounded by parallel grooves and ridges called sulci.  Though it is associated with another man, it was actually discovered by Simon Marius.  Larger than both Mercury and Pluto, it is theorized to have been pulled into a slightly elliptical orbit by the neighboring moon Callisto.  FTP, name this moon of Jupiter, the largest in the solar system.
Recently postulated to have a salt-water ocean underneath its crusty surface, the Hubble Space Telescope has found ozone around this body.  
Ganymede