This image from Cassini shows no less than five of Saturn’s moons in the same frame: Rhea (1,528 kilometers, or 949 miles across) is largest in the foreground; Dione (1,123 kilometers, or 698 miles across) can be seen just above the rings below Rhea near the center; Prometheus (86 kilometers, or 53 miles across) is just barely…
Category: Saturn’s Moons
From the LITD Archives: A Primordial Moon
A beautiful Cassini color-composite by Gordan Ugarkovic, this false-color image shows the ancient and heavily-cratered surface of Saturn’s moon Phoebe. Irregularly-shaped and bout 132 miles across, Phoebe is a fifteenth the size of our own moon but is believed to be much, much older. With its retrograde (backwards) orbit, high orbital incline and extremely dark,…
Cool Cassini Capture: Pandora
Cassini took this raw image of the 50-mile (81-km) -wide moon Pandora on May 7, 2011. The oval-shaped shepherd moon orbits Saturn just outside the F ring. Saturn’s long shadow is cast over the central portion of the rings in this image. Credit: NASA / JPL / Space Science Institute
Ride Along With Rhea
Assembled from 29 raw images taken by the Cassini orbiter on Monday, April 25, this animation brings us along an orbital ride with Rhea as it crosses Saturn’s nighttime face, the planet’s shadow cast across the ringplane. Sister moons Dione and Tethys travel the opposite lane in the background, eventually appearing to sink into Saturn’s…
Prime PDS Picks
Every six to nine months or so the Cassini Imaging Center dumps orbiter image data into NASA’s Planetary Data System, or PDS. This data is accessible to anyone with an internet connection, but it can be a little awkward to find exactly what you’re looking for (unless you’re familiar with the technical nomenclature of the…
Shocking News About Saturn’s Moon
Scientists have uncovered a shocking surprise about Saturn’s ice-spewing satellite Enceladus: the little 318-mile-wide moon creates a loop of electrically-charged particles that run from its north and south poles all the way up and over to Saturn’s north and south poles, forming a giant electron beam connecting the gas planet and its icy moon. Where the…
Ring Racer (Take Two)
I came across this image today while going through the latest Cassini PDS (Planetary Data System) release, and remembered how excited I was to see it the first time when it came in last June. If you missed it, here it is again (with an image fresh off the PDS!) Man, I just LOVE this…
Titan’s Spring Showers
It’s spring here in Earth’s northern hemisphere – and on Saturn’s cloudy moon Titan as well! This image, taken by Cassini in October of last year, shows bright clouds covering part of the moon’s equatorial and southern regions. These clouds were not always visible…in fact, they formed relatively quickly as Saturn and its moons moved…
Northern Exposure
Cassini gets a nice look at Enceladus’ icy, cratered north pole in this image, taken on December 21, 2010. In the background we catch a glimpse of Saturn’s rings as well! Fantastic image. The Cassini spacecraft was about 20,000 miles (34000 km) from Enceladus when this was taken, using its narrow-angle camera. 318 miles across…
Tethys and Saturn
660-mile-wide Tethys orbits in front of Saturn and the rings in this image from Cassini, taken on March 8, 2011. The rings cast their shadows onto the Saturn’s southern equatorial cloudtops as the planet continues moving into its summer season. The 155-mile-wide Melanthius Crater can be seen near Tethys’ south pole. A smaller…
Dione in the Distance
Cassini looks past the southern pole of Rhea to get a view of Dione on the far side of the rings in this image, captured on January 11, 2011. Rhea, Saturn’s second-largest moon, is approximately 950 miles in diameter and is literally covered in craters. Dione, also heavily cratered, is nearly 700 miles wide. It’s…
Shining Bright
Here’s a portrait of Enceladus, seen against a backdrop of Saturn’s atmosphere and ringplane seen edge-on. The ice-covered moon is one of the most reflective bodies in the solar system, bouncing back nearly all the sunlight that strikes it. Enceladus’ surface contains many different kinds of terrain, from older heavily-cratered regions to smoother, newer…
Lights in the Dark 