Europa has a period of about three days and it goes about four east and four west. Ganymede has a period of about seven days and it goes about seven east and seven west. IO has a period of about two days and it goes about and average of two east and two west. Callisto has a period of about seventeen days and it goes out about fourteen east and fourteen west. Depending on the period of the moon, the degrees of east and west that it moves varies. When it is closer, it doesn't move out as far as when it is further away. The graphs that I took off of the activity show that the further away ht moon is the more normal or wave like the graph looks. The closer the moon is to Jupiter, the more jumpy of non-wave like the graph looks.
Galileo must have had an extremely hard time trying to see the moons of Jupiter because he only had a telescope the was 10x. He probably wasn't able to see what the actual moons looked like or even see the moons at all. We were up to 400x when we could see all moons clearly. Galileo noticed that Jupiter had it's own mini solar system. Because he saw that these moons orbited around Jupiter he determined that our solar system was heliocentric. He decided that because moons could orbit around Jupiter we must orbit around the sun.
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