NASA's Cassini probe launched toward Saturn on Oct. 15, 1997

By the Everything Space news desk · 15 Oct 2026 · written from the sources below

Image: Space.com

The anniversary recalls a mission that transformed understanding of Saturn's rings and moons before its planned destruction in 2017.

On Oct. 15, 1997, NASA launched the Cassini spacecraft atop a Titan 4B rocket from Cape Canaveral, beginning a journey toward Saturn that would take nearly seven years to complete.

Cassini entered orbit around Saturn in 2004, becoming the first spacecraft to do so. It carried the European Space Agency's Huygens probe, which landed on Saturn's moon Titan in 2005.

Over 13 years orbiting the Saturn system, Cassini revealed the planet's rings to be dynamic and intricate rather than static features. It also found a hexagon-shaped jet stream at Saturn's north pole and massive storm systems at both poles, including a storm that grew to encircle the entire planet between 2010 and 2011.

Data relayed by Huygens and later flybys by Cassini showed that Titan likely has liquid hydrocarbon rain, rivers, lakes and seas on its surface, reshaping understanding of that moon's climate.

Cassini also detected icy plumes erupting from Saturn's moon Enceladus, pointing to a subsurface ocean with hydrothermal activity similar to processes seen on Earth.

After roughly 20 years in operation and running low on fuel, NASA deliberately sent Cassini into Saturn's atmosphere in September 2017, destroying the spacecraft to avoid any risk of contaminating Enceladus, Titan or other moons that might harbor conditions suitable for life.

Written in Everything Space’s own words by our news-desk model from the sources above, and checked against them in code: every number in this report appears in its sources, and no sentence is copied from them.