http://www.reddit.com/r/askscience/comments/eru42/so_if_the_universe_is_constantly_expanding_what/c1afq5o
When theory doesn’t match observation, sometimes what you have to let go of is not just the theory that’s giving you trouble, but also one of your fundamental assumptions about the universe. Much of 20th-century physics, from relativity to FLRW cosmology to quantum theory, was marked by this sort of letting go of some fact about nature that was intuitive and obvious and undeniable and wrong.
