Why doesn't our solar system run into other solar systems over billions of years. There is plenty of time for it to be attracted by gravity to other objects. So I thought, it should be a common occurrence? or is there a reason it is not a common occurrence?

  • $\begingroup$ Stars orbit the galaxy's centre, a supermassive black hole, so they don't really draw one another together in a collision-inducing manner. They also occupy so little of the galaxy's volume it's likely the Milky Way's eventual merge with Andromeda won't cause any collisions either. $\endgroup$ – J.G. Mar 18 '18 at 20:01

Space is big. You just won't believe how vastly, hugely, mind- bogglingly big it is. I mean, you may think it's a long way down the road to the chemist's, but that's just peanuts to space.

Douglas Adams, Hitchhikers Guide to the Galaxy

  • 3
    $\begingroup$ Geeks think the same way. I was coming to quote the same line. But you should note that it's from Douglas Adams. $\endgroup$ – dmckee Dec 5 '11 at 16:31
  • $\begingroup$ en.wikipedia.org/wiki/Andromeda%E2%80%93Milky_Way_collision for galaxy collision $\endgroup$ – anna v Mar 18 '18 at 17:02
  • $\begingroup$ @annav True, but that's because of gravity. When galaxies collide, stars and solar systems still don't collide. :O $\endgroup$ – JasonR Apr 2 '18 at 11:44

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.