NASA's Cassini spacecraft completed 22 orbits between Saturn's rings and the planet before its mission ended with a plunge into Saturn on Sept. 15, 2017.

Image Credit:NASA/JPL-Caltech

Cassini's Jan. 2, 2010 image shows Saturn's rings, with the night side brightened and the day side lit by sunlight and Saturn's reflected light.

Image Credit:NASA/JPL-Caltech/Space Science Institute

Saturn's colorful rings, seen by Cassini on Aug. 22, 2009, are made of ice particles, with their colors still a mystery to scientists.

Image Credit: NASA/JPL-Caltech/Space Science Institute

Cassini captured one of its final distant views of Saturn and its rings after 13 years in the Saturn system.

Image Credit: NASA/JPL-Caltech/Space Science Institute

Cassini captures Tethys on Saturn’s far side, its night side lit by sunlight reflected off Saturn, which would dominate the sky from the moon’s surface.

Image Credit: NASA/JPL-Caltech/Space Science Institute