It's a bit tricky to say who "discovered" all of Saturn's moons, as the discovery process unfolded over centuries, with different astronomers making key contributions. Here's a breakdown:

Galileo Galilei (1610):

* First Observation: Galileo was the first to observe something unusual around Saturn, but his telescope wasn't powerful enough to discern distinct moons. He described it as "ears" or "handles" on the planet.

Christiaan Huygens (1655):

* Titan: Huygens, using a more powerful telescope, was the first to clearly identify a moon orbiting Saturn – Titan. He was also the first to see Saturn's rings properly.

Giovanni Domenico Cassini (1671-1684):

* Four More Moons: Cassini discovered four more moons: Iapetus, Rhea, Tethys, and Dione.

William Herschel (1789):

* Mimas and Enceladus: Herschel discovered two more moons, Mimas and Enceladus.

Later Discoveries:

* More Moons: Since then, many more moons have been discovered using advanced telescopes and spacecraft. For example, the Voyager missions in the 1980s discovered many more, and the Cassini mission (2004-2017) discovered numerous small moons.

Important Note: Many of the smaller moons are difficult to distinguish from the ring system, and their discoveries have been confirmed or refuted over time.

So, while Galileo started the process, many individuals contributed to the discovery of Saturn's moons, making it difficult to name a single "discoverer."