What contributions did Edwin Powell hubble do?

Edwin Powell Hubble was an influential American astronomer who made significant contributions to our understanding of the universe. He is best known for establishing that galaxies exist beyond the Milky Way and for formulating Hubble's Law, which demonstrates that the universe is expanding. His observations of redshift in distant galaxies provided critical evidence for the Big Bang theory, fundamentally changing the field of cosmology. Hubble's work laid the groundwork for modern astrophysics and our comprehension of the cosmos.