I'm not an astrophysicist, but my understanding is that it's an essentially meaningless question. It isn't expanding into anything; it's just expanding.
Originally Posted by nutant gene 71
Do I really understand what that means? No, not in the slightest. It's not a concept I truly grasp. However, they didn't really cover it a lot in the classes I took in college, because those were mostly literature and history classes. I'm betting it would take an awful lot more study than I've done to really understand it, which is frankly true for me of most science.
"Now everyone was giving her that kind of look UFOlogists get when they suddenly say, 'Hey, if you shade your eyes you can see it is just a flock of geese after all.'"
"You can't erase icing."
"I can't believe it doesn't work! I found it on the internet, man!"