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The galaxies themselves are not expanding, and they're not all retreating out

from any central point. Every point in our Universe is moving away from every

other point, because the entire fabric of space itself is expanding, taking the

matter along with it. Thus, every observer at any point in our Universe observes

all other galaxies moving away from the point where he happens to be located.

No point can claim to be the "central" point.

It was Edwin Hubble, working at Caltech and the Mt. Palomar observatory, who

was able to compile the radial speeds of enough distant galaxies to demonstrate

the general expansion in every direction.

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