Enceladus’ ice-covered ocean closer to surface than previously thought

Enceladus as seen by Cassini. Photo Credit: NASA/JPL/Space Science Institute

When it comes to places in the Solar System to search for possible alien life, Saturn’s moon Enceladus is now right near the top of the list. Like Jupiter’s moon Europa, it has a subsurface ocean of water, and even plumes/geysers of water vapour which erupt from fissures in the icy surface near the south pole. Those plumes contain organics as discovered by the Cassini probe and there is evidence for hydrothermal activity on the ocean floor, just like on Earth. The fissures are warmed by heat from below, and now there is evidence that some of them are even warmer than expected, meaning that water could be closer to the surface than previously thought.

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Cassini returns stunning new close-up images of Saturn’s ‘ravioli’ moon and rings

New image of Saturn’s tiny moon Pan, which orbits inside the Encke Gap of Saturn’s rings. A thin “skirt” or ridge of material surrounds the moon’s equator, giving it a “ravioli” or “dumpling” appearance. Photo Credit: NASA/JPL-Caltech/Space Science Institute/Ian Regan

NASA’s Cassini mission may be entering its last several months now, but that doesn’t mean there aren’t any more cool science discoveries to be made. Some amazing new images were just posted of one of Saturn’s tiniest moons, Pan. This small asteroid-like object orbits Saturn within a gap in the rings and so is known as a ring moon. Scientists had a basic idea of what it looked like before, kind of like a walnut in earlier Cassini images, but the new images show it in much more detail and reveal how odd-looking it really is – more like a giant ravioli or dumpling. There have also been some incredible new close-up images of Saturn’s rings, as Cassini continues the Ring-Grazing Orbits phase of its mission. The images reveal intricate details never seen before in the structure of the rings.

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Image Gallery: New close-up views of Saturn and its rings

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

As the Cassini spacecraft continues its journey through the Ring-Grazing Orbits, it has been sending back some incredible new images of Saturn and its rings, many in detail never seen before. The rings are composed of countless individual streams of particles, all held in place by Saturn’s gravity. Click to view full-size versions of the raw images. All Cassini raw images are available here.

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Cassini sends back spectacular new images from first Ring-Grazing Orbit at Saturn

Saturn’s northern hemisphere up close: new image taken by Cassini on Dec. 3, 2016, showing small details in the turbulent atmosphere, including one corner of the “hexagon” with central cyclone. It was taken at a distance of about 240,000 miles (390,000 kilometers) from Saturn. Photo Credit: NASA/JPL-Caltech/Space Science Institute
Saturn’s northern hemisphere up close: new image taken by Cassini on Dec. 3, 2016, showing small details in the turbulent atmosphere, including one corner of the “hexagon” with central cyclone. It was taken at a distance of about 390,000 kilometres (240,000 miles) from Saturn. Photo Credit: NASA/JPL-Caltech/Space Science Institute

The Cassini spacecraft has successfully completed its first close pass of Saturn’s ring system, part of the Ring-Grazing Orbits phase of its mission, NASA said yesterday. As might be expected, Cassini has sent back some spectacular new images; these first images show Saturn’s northern hemisphere in incredible detail, including the famous “hexagon” jet stream surrounding the north pole.

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Gateway to the Ring-Grazing Orbits: Cassini conducts new flybys of Titan and Enceladus

Cassini conducted its next-to-last flyby of Saturn’s moon Titan yesterday, in preparation of the Ring-Grazing Orbits has of its mission. Image Credit: NASA/JPL-Caltech
Cassini conducted its next-to-last flyby of Saturn’s moon Titan yesterday, in preparation of the Ring-Grazing Orbits has of its mission. Image Credit: NASA/JPL-Caltech

As reported earlier this week, the Cassini spacecraft is now preparing to make a series of very close passes by the edges of Saturn’s rings, known as Ring-Grazing Orbits. A couple days ago, Cassini conducted a close flyby of Saturn’s largest moon Titan; this is the second-to-last ever flyby of Titan before Cassini enters the Grand Finale phase of its mission, culminating in a deliberate plunge into Saturn’s atmosphere on Sept. 15, 2017. During this flyby, Cassini focused on mapping the surface and surface temperatures and used Titan’s gravity to help place the spacecraft into the Ring-Grazing Orbits.

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