Review: The Expanding Universe

• 1. In 1929 Hubble announced that the pattern of redshifts of distant galaxies indicates they are moving away from us and that the more distant the galaxy, the faster it is moving away.

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• 2. The universe of galaxies is expanding and no one galaxy—the Milky Way included—is in any special, central position.

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• 3. That the universe is expanding is a conclusion based on the observations of redshifts of distant galaxies, it is not an observation.