Alexander Friedmann (cosmologist)

Alexander Friedmann was a Russian physicist and mathematician known for his groundbreaking work in cosmology in the early 20th century. He developed a set of equations, now known as the Friedmann equations, which describe how the universe expands over time. These equations were pivotal in understanding that the universe is not static but dynamic, leading to the concept of an expanding universe. His work laid the foundation for modern cosmology, influencing later theories, including the Big Bang. Friedmann's contributions helped shift our understanding of the cosmos and sparked further research into its structure and evolution.