Planet motion

Planet Motion
Always found near the ecliptic (except Pluto)
Planetary Nebula ...

Perhaps you have other questions about planet motion, but I think we've covered a lot here and I don't want to wear you out!
Instead I encourage you to give this lesson a lot of time and thought so it really sinks in.

So Ptolemy adopted an instrumentalist view---this strange model is only an accurate calculator to predict the planet motions but the reality is Aristotle's model.

See also: Orbit, Astronomy, Earth, Planet, Universe