March 1, 2006
|The expanding universe is just the playing field where galaxies interact with each other. The most important way they interact is by gravity, whose range is, theoretically, unlimited. Every galaxy attracts every other galaxy, and their mutual pull slows the rate of moving apart from each other. The closer two galaxies are to each other, the stronger their gravitational attraction is (and the slower the pace at which expansion would tear them apart). |
You are currently not logged in. This article is only available to Astronomy magazine subscribers.
Already a subscriber to Astronomy magazine?
If you are already a subscriber to Astronomy magazine you must log into your account to view this article. If you do not have an account you will
need to regsiter for one. Registration is FREE and only takes a couple minutes.
Non-subscribers, Subscribe TODAY and save!
Get instant access to subscriber content on Astronomy.com!
- Access our interactive Atlas of the Stars
- Get full access to StarDome PLUS
- Columnist articles
- Search and view our equipment review archive
- Receive full access to our Ask Astro answers
- BONUS web extras not included in the magazine
- Much more!