Original: Edwin Powell Hubble (November 20, 1889 â "September 28, 1953) was an American astronomer who profoundly changed understanding of the universe by confirming the existence of galaxies other than our own, the Milky Way.
Simplified: Edwin Powell Hubble (November 20, 1889 â "September 28, 1953) was an American astronomer who helped our understanding of the universe by showing us that there are galaxies other than our own, the Milky Way.