How is the universe ever expanding
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When scientists talk about the expanding universe, they mean that it has been growing ever since its beginning with the Big Bang. The galaxies outside of our own are moving away from us, and the ones that are farthest away are moving the fastest
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American astronomer Edwin Hubble and others discovered in the 1920s that the universe is expanding by showing that most Galaxies are receding from the Milky Way- and the farther away they are, the faster they are receding. The roughly constant ratio between speed and distance become known as the Hubble constant.
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