Alfred Hubble

Alfred Hubble was an American astronomer best known for his work in studying galaxies beyond our Milky Way. He contributed significantly to understanding how galaxies are organized and moving through space. Hubble’s observations showed that many galaxies are moving away from us, with their speed increasing with distance, which provided strong evidence for the expanding universe. This discovery fundamentally changed our understanding of the cosmos and led to the development of modern cosmology. His work laid the foundation for the concept that the universe is expanding, a key element in our understanding of the universe’s history and evolution.