Exploratour - Evolution of the Solar System
The nice neat row of craters shown in this picture on the surface of Jupiter's moon Callisto is called a craterchain. It was probably made by a broken comet just like Comet Shoemaker-Levy 9. Craterchains found on moons such as this show that comets have hit planets and moons before.
This is page 27 of 60
This is page 27 of 60