Create a detailed, step$-$by$-$step description of evidence that needs to be collected and a complete explanation of how this could be done$$not just $$look and see when the Ganymede is first on one side and then on the other,,$$ but exactly what would someone need to do$,$ step$-$by$-$step, to accomplish this. You might include a table and sketches$-$the goal is to be precise and detailed enough that someone else could follow your procedure