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[QUOTE]Originally posted by Krenim: [QB] [QUOTE]Originally posted by HerbShrump: [qb]Is there nothing in real life that is currently doing the same thing (besides the Universe). Nothing you can point to and say "see, just like that!"[/qb][/QUOTE]Alas, no. Space-time is a 4D concept, which human beings have a tough time understanding. Hence, the usage of 3D, 2D, and 1D analogies. [QUOTE]Originally posted by HerbShrump: [qb]2. Reverend mentions colliding galaxies. If everything is expanding away from everything else, then how is it they are colliding? Are they not moving/expanding at the same rate? [/qb][/QUOTE]Galaxies can collide because the gravitational forces between them can locally overcome the expansion of the universe. From our point of view, the galaxies near us aren't moving away very fast. Gravity can overcome that fairly easily. It's only at much greater distances that galaxies appear to start moving pretty quickly and gravity can't keep up. [QUOTE]Originally posted by HerbShrump: [qb]If an observer were stationed on one of these galaxies that is actually getting closer/colliding with another galaxy, what would it look like? Would his theories about the Big Bang and Expanding Universe differ from ours because, from his frame of reference, things are contracting toward his point of view instead of away from it? [/qb][/QUOTE]Considering how our galaxy and the Andromeda Galaxy are moving towards each other, and will collide in several billion years, no. But again, that's local (cosmically speaking). As you get further from the Milky Way, galaxies overwhelmingly (if not unanimously) move away from us at increasingly faster rates. [/QB][/QUOTE]
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