How were the rings on Uranus discovered

I have a planet project due on the 27th. So I need all the answers you have! Please answer soon!!

It was planned to use the occultation of a star to study the planet's atmosphere. However, when the results were analysed, it was discovered that the star had disappeared from view five times before the planet occluded it. This led to the conclusion that Uranus had a ring system.

Kumo's answer is exactly correct, but I'll add that, "occultation" occurs when one object passes in front of a second object, blocking that second object from our view.

Also, gaseous compositions can be determined by what light is absorbed and emitted through an atmosphere, which is why scientists waited for the star pass behind Uranus. It disappeared sooner than expected and reappeared just before its occultation, which meant rings blocked the view.

Painful memories much...!!!!