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Feb29-12, 06:24 PM
Sci Advisor
P: 8,792
Quote Quote by waterfall View Post
Also does this expanding space only works for curved spacetime? Or is it not related to whether curved or flat? Meaning flat spacetime can expand too?
Yes, flat spacetime can be described as expanding space - that's the Milne universe.

BTW, read pervect's post #19 and the paper he linked to.