Gaston Cassini was a French-born American astronomer, best known for his work in planetary science and celestial mechanics. Born on January 28, 1920, he made significant contributions to the understanding of the Saturn system, particularly its rings and moons. Cassini played a crucial role in the Cassini-Huygens mission, which was launched in 1997 to study Saturn and its environment. Throughout his career, Cassini published numerous scientific papers and was involved in various space missions. He served as a professor at the California Institute of Technology and was a member of the National Academy of Sciences. His work has had a lasting impact on the field of astronomy.