Question

For astronomy class, please answer this question clearly, thank you

Io, Europa, and Titan are all moons of Jovian planets that are known or suspected to be geologically active. They are too small to have significant radioactive heating in their cores like large terrestrials planets (e.g. Earth or Venus). Discuss the sort of heating that astronomers believe is responsible for the heating on these large moons. Why is this heating of great interest particularly for Europa?

Answer 1