Here's why:

* Galileo's Telescopes: While Galileo was a pioneer in telescope technology, his instruments were not powerful enough to resolve the rings of Saturn.

* Galileo's Observations: Galileo did observe Saturn and was puzzled by its appearance. He described it as having "ears" or "handles" on either side. This was a very early and somewhat inaccurate depiction of the rings.

* Later Discoveries: It wasn't until much later, in the 17th century, that Christiaan Huygens, using a more powerful telescope, was able to identify the rings as a distinct feature around Saturn.

In summary, Galileo's observations of Saturn were important, but he didn't discover the rings. His observations were the first to show that Saturn was not a simple sphere.