title: Pygame make a circle rotate around another
body: <p>I would like to make some kind of solar system in pygame. I've managed to do a fixed one but I thought it would be more interesting to do one with planets moving around the sun and moons around planets etc. Is there a way I could do that (using pygame if possible)?</p>
  
  <p>What I would like is : </p>
  
  <pre><code>Sun = pygame.draw.circle(...)
  planet1 = pygame.draw.circle(...)
  etc.
  
  a = [planet1, planet2, ...]
  
  for p in a:
      move p[2] to pos(x, y)
  </code></pre>
  
  <p>That is what I think would work but I'm not sure how to do it. Also, I've thought about deleting the ancient planet and drawing a new one right next to it, but problem is I'm using random features (like colours, distance to the sun, number of planets in the system etc.) and it would have to keep these same features. Any ideas? </p>
  
  <p>Thanks in advance!</p>