1889 - 1953
Edwin Powell Hubble was an American astronomer born on November 20, 1889, and is best known for his contributions to the field of extragalactic astronomy. He played a pivotal role in establishing the existence of galaxies beyond the Milky Way and formulated Hubble's Law, which demonstrates the relationship between the distance of galaxies and their recessional velocity, providing key evidence for the expansion of the universe. Hubble's work significantly advanced our understanding of cosmology and laid the groundwork for modern astrophysics.