NASA

In 1997, NASA, in collaboration with ESA and ASI (Italy), launched the Cassini-Huygens space-research mission.

An excerpt from the article 29 facts about NASA
Commonly referred to as Cassini, its goal was to study Saturn, its rings, and natural satellites. Cassini probe became the first artificial satellite of Saturn in 2004 and disintegrated in its atmosphere on September 15th, 2017. The Huygens lander successfully landed on the Titan—Saturn’s largest moon—on January 14th, 2005, and transmitted data to the Cassini orbiter, which later relayed the data to Earth.