In 1929, Edwin Hubble announced that almost all galaxies appeared to be moving away from us. In fact, he found that the universe was expanding - with all of the galaxies moving away from each other. This phenomenon was observed as a redshift of a galaxy's spectrum. This redshift appeared to be larger for faint, presumably further, galaxies. Hence, the farther a galaxy, the faster it is receding from Earth. www. starchild. gsfc. nasa. govHow is the color shift referenced above related to the motion of galaxies?
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In 1929, Edwin Hubble announced that almost all galaxies appeared to be moving away from us. In fact...
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