What discovery is Edwin Hubble best known for?
by 
keithold thanks all baggers
ANSWERS: 2
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Information concerning galaxies. He discovered there were other galaxies in the universe beside the Milky Way and that the universe is expanding.
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He helped prove there were other galaxies and showed that red-shift alters proportionately with the distance a galaxy is from the Milky Way; he didn't discover red-shift but rather was the first to discover this relationship. This led to the current understanding of expansion of the universe.
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