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Edwin Hubble

Edwin Hubble, dressed in a formal suit, sits against a dark background, exuding a serious demeanor characteristic of his work as an American astronomer.

American astronomer (1889–1953) who, working with the 100-inch Hooker telescope on Mount Wilson in California, established that spiral nebulae were galaxies external to the Milky Way and that their recession velocities increase with distance. The relation is known as Hubble's law, the Hubble Space Telescope is named for him, and his 1929 plot is one of the most consequential graphs in twentieth-century science.

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