Aleksandr Zeldovich is a prominent Russian astrophysicist known for his significant contributions to cosmology and theoretical physics. He played a crucial role in the development of the Big Bang theory and the understanding of cosmic microwave background radiation. His work has influenced various fields, including nuclear physics and plasma physics. Zeldovich was born on March 8, 1914, in Moscow, Russia. He was a member of the Soviet Academy of Sciences and received numerous awards for his research. His legacy continues to impact modern astrophysics, and he is remembered for his innovative ideas and scientific achievements.