Quote:
Originally Posted by tusenfem
As we see everything moving AWAY from us in ALL directions, this would mean that there would be a big "shell like" structure around the "universe". And it has certainly been mentioned to you in one of your countless Q&A threads only the mass inside a sphere adds to gravitation, not what is outside of the sphere.
Unless you propose us to live in a mirror universe (mirrored e.g. wrt. a black hole horizon) one point CANNOT make the expansion.
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Why is a shell needed? Lets say that there is just a HUGE gravitational source outside of our visible universe. ( Maybe another brain in a pre-big-bang state ).
We are all being pulled to that brain. the things that are closer to that area of the universe are being pulled faster ... the things that are farther from that point are being pulled slower ... both are being pulled away from us because of this gravitational force.