The astronomer Giovanni Domenico Cassini died at the age of 87. Here is all you want to know, and more!
Biography - A Short Wiki
Italian astronomer, engineer and mathematician who was the first to notice the division of the rings on Saturn and discovered four of the planet’s satellites. The Cassini Division, a 4,800-kilometer gap between rings A and B around Saturn, is named in his honor.
His career in astronomy got started when he accepted a position at a Panzano observatory, where he worked with amateur astronomer Cornelio Malvasia beginning in 1648.
He rejected Sir Isaac Newton’s theory of gravity due to faulty results from his own experiments.