We can push a book off of a desk and see the effect of gravity, but that leaves a lot to the imagination. We could spend some time under an apple tree as Newton…

Or you can check out this post from one of my favorite blogs, Bad Astronomy. I apologize for a simple redirect, but Mr. Plait’s post is done way better than I could attempt it. It really is pretty cool or I’d not bother to send you off on the internet  🙂

http://www.slate.com/blogs/bad_astronomy/2017/01/19/daphnis_makes_waves_in_saturn_s_rings.html