Of the Galilean satellites, which has the oldest, most heavily cratered surface?
A)Titan
B)Io
C)Europa
D)Callisto
E)Ganymede

Question

Quizplus · Accepted Answer

Callisto has the oldest, most heavily cratered surface of the Galilean satellites. This is due to its lack of geological activity, which would otherwise erase old craters over time. Callisto is the most heavily cratered of the Galilean satellites, indicating an ancient surface that has remained largely unaltered by internal activity.

Of the Galilean Satellites, Which Has the Oldest, Most Heavily