Who was Cassini, after whom Saturn-bound probe was named?
Giovanni Cassini, an Italian-born French astronomer, was the first to observe the gap between Saturn's rings, later named the Cassini division. He discovered four of Saturn's moons and stated Saturn's rings were composed of small particles and not a single body. In 1997, NASA launched a $3.9-billion mission to explore Saturn and named it 'Cassini' to honour the astronomer.