Cassini saturn rings

The Cassini spacecraft, a joint NASA, ESA, and ASI mission, revealed unprecedented details of Saturn's rings from 2004 to 2017.

About this subject

The Cassini-Huygens mission launched in 1997 and entered Saturn orbit in 2004. Over 13 years, the spacecraft studied the planet, its rings, and moons. Saturn's rings are primarily composed of water ice and rocky debris, ranging from micrometers to meters in size. Cassini discovered dynamic features such as density waves, small shepherd moons that sculpt the rings, and even ring particles raining onto Saturn's atmosphere. The probe also revealed that the rings are relatively young, perhaps 100 million years old, and may be slowly disintegrating. One of the greatest legacies was the 'Grand Finale' in 2017, when Cassini dove between the rings and planet, sending data until the end. The mission provided over 600 gigabytes of data, transforming our understanding of the Saturn system.

Frequently Asked Questions

What was Cassini's main discovery about Saturn's rings?

Cassini found that the rings are young (about 100 million years old) and dynamic, featuring density waves and shepherd moons.

How long did the Cassini mission last at Saturn?

Cassini orbited Saturn for 13 years, from 2004 to 2017, when it was deliberately destroyed in the planet's atmosphere.

What are Saturn's rings made of?

The rings are composed mostly of water ice, with small amounts of rocky material, ranging from dust to mountain-sized chunks.