One of this location's features, Gipul Catena, is an almost six hundred twenty-kilometer-long straight line of craters, and its magnetic field is generated by rapid circulation of a large electrolyte flow beneath its surface, making it strong enough 
One of this location's features, Gipul Catena, is an almost six hundred twenty-kilometer-long straight line of craters, and its magnetic field is generated by rapid circulation of a large electrolyte flow beneath its surface, making it strong enough to be detectable even in the larger fields of nearby bodies. As it has almost no geological activity, it has the oldest and most cratered surface in the solar system. Many of its features are named after Norse mythology, as exemplified by the impact craters Valhalla and Asgard. It is the third-largest moon in the solar system and is farther away from Jupiter than the other Galilean moons. FTP, name this moon named after a nymph Zeus loved who was transformed into a bear.
One of this location's features, Gipul Catena, is an almost six hundred twenty-kilometer-long straight line of craters, and its magnetic field is generated by rapid circulation of a large electrolyte flow beneath its surface, making it strong enough to be detectable even in the larger fields of nearby bodies.
Callisto