Edwin Hubble was an American astronomer who played a pivotal role in the development of astrophysics. Born in 1889, Hubble made groundbreaking discoveries that revolutionized our understanding of the universe. He is best known for his work on the expansion of the universe, now known as "Hubble's law." By observing the redshift of distant galaxies, he provided evidence for the concept of an expanding universe, leading to the formulation of the Big Bang theory. Hubble's contributions to astronomy earned him numerous awards and honors, cementing his legacy as one of the most influential figures in the field.