Edwin Hubble, American Astronomer

Edwin Powell Hubble (1889-1953) was an American astronomer who profoundly changed the understanding of the universe by confirming the existence of galaxies other than our own, the Milky Way. He also discovered that the degree of Doppler shift (specifically redshift') observed in the light spectra from other galaxies increased in proportion to a particular galaxy's distance from Earth. This relationship became known as Hubble's law, and helped establish that the universe is expanding

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Astronomer Doppler Expanding Hubble Sequence Shift Spectra Universe

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