For thirteen years, from 2004 to 2017, the Cassini-Huygens mission conducted a detailed survey of the Saturn system, fundamentally altering our understanding of gas giants and their satellites.
Titan, the largest moon, is almost 50% bigger than Earth’s moon, with a diameter of 3,200 miles. In comparison, Saturn has much smaller moons, including Prometheus, which is only 53 miles in diameter.
The planet’s iconic ring system, once thought to be relatively placid, was shown to be remarkably dynamic, composed of over 99% water ice, with ring particles ranging in size from micrometers to tens of meters.
Author's summary: Cassini mission reveals Titan's uniqueness.