Cassini-Huygens probe launched 1997

A storm in the northern hemisphere photographed by Cassini in 2011.

The Cassini-Huygens spacecraft, launched October 15, 1997, was a collaboration between NASA, the European Space Agency and the Italian Space Agency. Cassini was the fourth space probe to encounter Saturn but the first to enter into orbit. 

The Cassini probe was named after Giovanni Cassini, an Italian astronomer who discovered four of Saturn's moons and noted the separation of her rings.

The lander Huygens lander was named after Dutch astronomer Christiaan Huygens, who discovered Titan and is noted for his studies of Saturn's rings.

Cassini arrived in July 2004 and spent the next 13 years, far beyond its intended mission, studying the planet.  It was intentionally sent plunging into Saturn's atmosphere September 2017, to destroy it, preventing it from contaminating other celestial bodies.

The lander Huygens descended to the surface of Titan January 2015.  It took the first pictures from the surface of another moon besides ours.