Are you supposed to get it to go through the space between the "stars"? Is it even possible? Edit: Got my first point (50 - 100 tries?). You need to make it go a full orbit without touching the outer circle. This seems obvious in retrospect. Edit 2: And they knock each other out of orbit. This is fun.
No, just have as many "satellites" in orbit as possible simultaneously. The game is continuous. I got up to 5 and gave up ;)
I got 4 and was very, very proud of myself. That said, if it were controllable through spacebar, I'd play a lot longer.