Giacomo Cassini was an Italian astronomer and mathematician born on June 8, 1625, in Perinaldo, Italy. He is best known for his work in the field of astronomy, particularly for his studies of the planets and their moons. Cassini was a pioneer in the use of telescopes for astronomical observations and made significant contributions to the understanding of the solar system. In 1669, Cassini discovered four of the moons of Saturn, which were later named Cassini's moons in his honor. He also identified the division in Saturn's rings, known as the Cassini Division, which is a gap between the A and B rings. Cassini's work laid the foundation for future astronomical research and exploration.