How do Saturn’s rings stay in the same shape even in orbit?

Question: How do Saturn's rings stay in the same shape even in orbit?
- Keywords:
  orbit,
  planet,
  ring,
  saturn,
  space
Asked by mrkiwi27 to Daphne, Darren, Jon, Katherine on 21 Mar 2012.
- Daphne Ng answered on 21 Mar 2012:
  
  Saturn’s rings are made of particles that orbit around Saturn. The gravitational pull of Saturn on the particles causes the rings to stay in place as Saturn orbits. Same reason as why the moon doesn’t fall out of the sky- because the Earth’s gravity pulls on it!

Question: How do Saturn's rings stay in the same shape even in orbit?