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Moon Monday: Prometheus

Emily Lakdawalla • April 23, 2018

Happy Monday! Here's a picture of Prometheus. You may think it's a picture of Saturn. Look hard, toward the bottom, and you'll see Prometheus, doing its part to keep the F ring in line.

Explore spinnable Saturn and Jupiter moons with Google Maps

Emily Lakdawalla • October 27, 2017 • 2

Google Maps released several new map products that allow you to see the locations of named features on many solar system planets and non-planets, spinning them around in space with your mouse.

Fall 2017 issue of The Planetary Report now available

Donna Stevens • September 27, 2017

The Fall 2017 issue of The Planetary Report is in the mail and available online now to our members!

Saturn's small satellites, to scale

Emily Lakdawalla • May 17, 2017 • 3

Emily shares another of her popular size comparisons of solar system bodies, taking advantage of Cassini's recent views of Saturn's tiniest moons.

Cassini's 'Grand Finale' Portrait of Saturn

Ian Regan • May 16, 2017

Amateur image processor Ian Regan shares a stunning mosaic of Saturn in all its ringed glory.

Cassini, with only a half-year to go at Saturn, just keeps dropping awesome images

Jason Davis • March 09, 2017 • 7

Our latest roundup of Cassini goodies from Saturn includes Pan, a ravioli-shaped moon that orbits inside the planet's ring system.

Amazing photos of tiny moons as Cassini orbits among the rings

Emily Lakdawalla • January 19, 2017 • 6

Behold: Daphnis, the tiny, 8-kilometer moon that orbits within a ring gap, gently tugging on the edges of the gap to create delicate scallops.

Pretty pictures: Bittersweet goodies from Cassini at Titan, Enceladus, and Telesto

Emily Lakdawalla • January 15, 2016 • 7

Tomorrow, Cassini will fly by Titan, picking up a gravity assist that will tilt its orbit slightly up and out of the ring plane. That will end what has been a wonderful year of frequent encounters with Saturnian moons.

Prometheus, Pandora, and the braided F ring in motion

Emily Lakdawalla • March 23, 2015

Cassini recently took a long, high-resolution movie of the F ring, catching a view of its ringlets, clumps, and streamers, and two potato-shaped moons, Prometheus and Pandora.

On the masses and motions of mini-moons: Pandora's not a "shepherd," but Prometheus still is

Emily Lakdawalla • July 04, 2014 • 4

As Cassini celebrates 10 years at Saturn, we're beginning to see its long-term observations of Saturnian moons bear fruit. A surprising new result: While Prometheus exerts control over the F ring and Atlas, Pandora -- long thought to be a shepherd of the F ring -- does not.

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