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The hexagonal vortex at Saturn's north pole changed color significantly between June 2013 (left) and April 2017 (right), as seen in views from the Cassini spacecraft. For the left image, each frame occurs approximately 130 minutes after the previous one, and for the right, each frame follows after an average of 230 minutes. Researchers combined images taken with the spacecraft's red, green and blue filters for the natural-color views. | NASA/JPL-Caltech/Space Science Institute/Hampton University
Planets

Cassini Gets ‘Ringside Seat’ to Saturn's Changing Seasons

Nearing the end of its extended mission to Saturn, NASA's Cassini probe continues to provide scientists with new insights about the planet and its moons.

A giant storm passed by its own tail after circling Saturn in this true-color Cassini photo, taken Feb. 25, 2011, about 12 weeks after the storm started. Lightning deep in the planet's atmosphere produced significant radio noise during the storm. The storm formed and dispersed over the course of seven months; researchers said this type of Saturn storm happens only about every 30 Earth years. | NASA/JPL-Caltech/Space Science Institute
Storms on Saturn's moon Titan changed as Saturn moved through equinox and toward solstice. In this 2011 image, methane clouds can be seen concentrated near the moon's equator. | NASA/JPL-Caltech/Space Science Institute