Pluto's Large Nitrogen Ice 'Sea' Probably Formed from Giant Impact, Scientists Say

The vast ice plains of Sputnik Planum on Pluto. The basin, now filled with nitrogen ice, was probably created by a huge impact. Photo Credit: NASA/JHUAPL/SwRI

Instead of being little more than a frozen and unchanging rocky iceball, Pluto has been revealed to be a complex and dynamic little world, with mountains, valleys, vast […]

Cassini Completes Epic Flyby Through Geysers of Enceladus, Sends Back Stunning New Images

View of Enceladus and Saturn’s rings during the flyby on Oct. 28, 2015, at a distance of 106,000 miles (171,000 kilometers) from Enceladus. Image Credit: NASA/JPL-Caltech/Space Science Institute

The Cassini spacecraft has successfully completed its deepest dive through the water vapor geysers of Enceladus and is now sending back some fantastic images of the […]

Sampling an Alien Ocean: Cassini Prepares for Deep Dive Through Enceladus' Geysers on Wednesday

Artist’s conception of Cassini making a close flyby of Enceladus and its water vapor plumes. Image Credit: NASA/JPL

This coming Wednesday, Oct. 28, 2015, the Cassini spacecraft will make a historic close flyby (dubbed “E21”) of Saturn’s tiny icy moon Enceladus, not only passing very close to the surface, but also making the deepest […]

Cassini Sends Back Spectacular New Images of the North Pole Region of Enceladus

New high-resolution view of the north polar region on Enceladus, showing a cratered surface crisscrossed by many cracks. Image Credit: NASA/JPL-Caltech/Space Science Institute

The Cassini spacecraft has just successfully completed the first of three final close flybys of Saturn’s moon Enceladus, and has sent back some spectacular images of the northern regions of this […]

Cassini Begins Series of Three Close Flybys of Saturn's Water Moon Enceladus

Illustration of Cassini’s “E-20” flyby of Enceladus, which will provide new, detailed views of the moon’s north polar region. Image Credit: NASA/JPL-Caltech

Starting today, the Cassini spacecraft is making the first of three scheduled close flybys of the moon Enceladus, which will provide the first good look at the north polar region of the […]

New Evidence From Cassini Indicates Saturn's Moon Enceladus Has Global Subsurface Ocean

Diagram depicting the interior of Enceladus, with the global ocean between the ice crust above and the rocky core below. The jets of water vapor erupt from fissures at the south pole. Image Credit: NASA/JPL-Caltech

Along with Jupiter’s moon Europa, Saturn’s moon Enceladus is considered to be one of the best places to look […]

Dark Material in Fractures on Europa's Surface Is Sea Salt, New Research Suggests

The darker-colored material within the fractures and elsewhere on Europa’s surface might be sea salt brought up from the ocean below. Image Credit: NASA/JPL/Ted Stryk

For over a decade, scientists have been curious about the long fractures on Europa’s icy surface and the darker-colored material they contain, as well as other relatively young geological […]

Enceladus' Water Geysers May Be 'Curtain Eruptions' According to New Study

The water vapor jets on Enceladus are now thought to mostly be more like diffuse “curtains” rather than separate plumes. Image Credit: NASA/JPL-Caltech/SSI/PSI

The water vapor geysers on Saturn’s moon Enceladus are one of the most fascinating phenomena in the Solar System; the jets spray far out into space in a dazzling display unseen […]

Discovery of Salty Aquifer Beneath Antarctica May Have Implications for Life on Mars

The SkyTEM sensor suspended beneath a helicopter over Blood Falls and the Taylor Glacier in Antarctica. Photo Credit: L. Jansan

Scientists have discovered a vast network of salty aquifers beneath the surface of Antarctica, thanks to an airborne imaging system used there for the first time. The finding may have interesting implications for the […]

Just Add Water: Scientists Explain Saturn's Powerful Thunderstorms

A giant storm in Saturn’s northern hemisphere, which now extends around the planet, as seen by the Cassini spacecraft. Photo Credit: NASA/JPL-Caltech

Thunderstorms are a powerful force of nature, but the ones we experience on Earth are dwarfed by the ones on the gas giant planet Saturn. They are huge and can be larger […]