Tag Archive for 'Cassini'

This infrared image, taken by NASA’s Cassini spacecraft, shows an aurora at the southern pole of Saturn. Image credit: NASA / Cassini / VIMS Team / University of Arizona / University of Leicester / JPL / ASI.

Weather Drives Saturn’s Powerful Aurorae, Planetary Scientists Say

Feb 9, 2022 by News Staff

Saturn is unique among planets observed to date in that some of its aurorae are generated by swirling winds within its atmosphere, and not just from the...

Mimas’ surface, like the surfaces of most of the other major Saturnian moons without atmospheres, is not pure ice but contains some dark impurities; the relatively dark markings appear along the lower portion of the walls of the 130-km-wide Herschel Crater (the peak in the middle of the crater is about as tall as Mount Everest; the impact that made it likely almost destroyed the moon) and some of the smaller craters; scientists interpret this darkening as evidence for the gradual concentration of impurities from evaporating icy materials in areas where the dark impurities slide slowly down the crater wall. Image credit: NASA / JPL / Space Science Institute.

Saturn’s Moon Mimas Hosts Global Ocean, New Study Suggests

Jan 20, 2022 by News Staff

Mimas, the smallest and innermost of Saturn’s eight main moons, may be warm enough to harbor a global, liquid water ocean beneath a 24-31-km (15-19-mile)...

An artist’s rendering of the surface of Saturn’s largest moon, Titan. Image credit: Benjamin de Bivort, debivort.org / CC BY-SA 3.0.

Scientists Create Maps of Titan’s Hydrocarbon Rivers and Tributaries

Oct 19, 2021 by News Staff

Planetary researchers have mapped all observable fluvial features on Saturn’s hazy moon Titan — excluding those in the highly incised labyrinth...

An illustration of Saturn and its ‘fuzzy’ core. Image credit: R. Hurt, IPAC / Caltech.

Saturn Has Diffuse, Stably Stratified Core, New Study Says

Aug 16, 2021 by News Staff

Astronomers using data from NASA’s Cassini spacecraft on ripples in Saturn’s rings have revealed new information about the gas giant’s mysterious...

Enceladus’ tiger stripes are known to be spewing ice from the moon’s icy interior into space, creating a cloud of fine ice particles over the moon’s south pole and creating Saturn’s mysterious E-ring. Evidence for this has come from NASA’s Cassini spacecraft that orbited Saturn from 2004 to 2017. Pictured here, a high resolution image of Enceladus is shown from a close flyby. Tiger stripes are visible in false-color blue. Image credit: NASA / ESA / JPL / SSI / Cassini Imaging Team.

New Modeling Study Points toward Biological Origin of Enceladus’ Methane

Jul 7, 2021 by News Staff

Observations from NASA’s Cassini spacecraft established that Enceladus, the sixth-largest of Saturn’s moons, has a global subsurface ocean. An analysis...

Saturn’s interior with a stably stratified helium insoluble layer (HIL). Image credit: Yi Zheng, HEMI / MICA Extreme Arts Program.

Helium Rain Layer Influences Unique Magnetic Field of Saturn, Study Suggests

May 6, 2021 by News Staff

Detailed measurements from the Grand Finale phase of NASA’s Cassini mission revealed distinctive features of Saturn’s magnetic field. These features...

An artistic rendering of Kraken Mare, a large liquid methane sea on Titan. Image credit: NASA’s John Glenn Research Center.

Titan’s Largest Methane Sea is Over 100 Meters Deep

Jan 21, 2021 by News Staff

Kraken Mare, a sea of liquid methane on Saturn’s moon Titan, is at least 100-m (330 feet) deep near its center, according to an analysis of data collected...

This colorized radar image, taken by NASA’s Cassini orbiter on February 15, 2005, shows a 60-km (37-mile) wide crater on Titan. The appearance of the crater and the extremely bright (hence rough) blanket of material surrounding it is indicative of an origin by impact, in which a hypervelocity comet or asteroid, in this case, roughly 5-10 km (3-6 miles) in size, slammed into the surface of the moon. The bright surrounding blanket is debris, or ejecta, thrown out of the crater. The asymmetric appearance of this ejecta blanket could be an effect of atmospheric winds associated with the impact itself. Although clearly formed by impact, the feature lacks a central peak, suggesting that it has been eroded or otherwise modified after formation. Rainfall, wind erosion, and softening of the solid material in which the crater formed are all possible processes that might have altered this impact feature. Image credit: NASA / JPL-Caltech / ASI.

Cassini Finds Organics and Water Ice in Titan’s Impact Craters

Nov 6, 2020 by News Staff

Using the spectral data collected by the Visual and Infrared Mapping Spectrometer (VIMS) onboard NASA’s Cassini spacecraft, a team of researchers has...

In these detailed infrared images of Enceladus, reddish areas indicate fresh ice that has been deposited on the surface. Image credit: NASA / JPL-Caltech / University of Arizona / LPG / CNRS / University of Nantes / Space Science Instituto.

Cassini Finds Fresh Ice in Northern Hemisphere of Enceladus

Sep 21, 2020 by News Staff

Spectral data gathered by the Visual and Infrared Mapping Spectrometer (VIMS) onboard NASA’s Cassini spacecraft provide strong evidence that the northern...

New model suggests the shape of the Sun’s bubble of influence, the heliosphere (seen in yellow), may be a deflated croissant shape, rather than the long-tailed comet shape suggested by other research. Image credit: Opher et al, doi: 10.1038/s41550-020-1036-0.

Solar System’s Heliosphere May Be Smaller and Rounder than Previously Thought

Aug 6, 2020 by News Staff

The heliosphere is a giant magnetic bubble that contains our Solar System, the solar wind and the solar magnetic field. Outside the heliosphere is the...

This mosaic of Saturn and its largest moon Titan combines six images -- two each of red, green and blue spectral filters -- to create this natural color view. The images were obtained with Cassini’s wide-angle camera on May 6, 2012, at a distance of approximately 778,000 km (483,000 miles) from Titan. Image credit: NASA / JPL-Caltech / Space Science Institute.

Titan Migrates Away from Saturn Faster than Previously Thought

Jun 9, 2020 by News Staff

Saturn is orbited by 82 moons, and tidal friction within the giant planet causes the moons to migrate outwards. In a study published this week in the journal...

Composite of a true color image of Saturn, observed by Cassini in 2016, overlaid with a false color representation of the ultraviolet aurora in the northern hemisphere as observed on August 20, 2017. Image credit: NASA / JPL-Caltech / Space Science Institute / A. Bader, Lancaster University.

Pole-to-Pole Map of Saturn’s Thermosphere Reveals Likely Reason Why It’s So Hot

Apr 8, 2020 by News Staff

A team of planetary researchers from the United States and the United Kingdom has created a 2D map of densities and temperatures in Saturn’s thermosphere...

$Cassini captured this image of Enceladus as it neared the moon for its closest-ever dive past the moon’s active south polar region. The image was taken in visible light with the spacecraft’s narrow-angle camera on October 28, 2015. The image shows heavily cratered northern latitudes at top, transitioning to fractured, wrinkled terrain in the middle and southern latitudes. The wavy boundary of the moon's active south polar region is visible at bottom, where it disappears into wintry darkness. This view looks towards the Saturn-facing side of Enceladus. The image was taken at a distance of approximately 60,000 miles (96,000 km) from Enceladus and at a Sun-Enceladus-spacecraft, or phase, angle of 45 degrees. Image credit: NASA / JPL-Caltech / Space Science Institute.$

Geochemical Model Reveals Inner Complexity of Enceladus

Jan 23, 2020 by News Staff

Enceladus, an ocean-harboring moon of Saturn, erupts a plume that contains gases and frozen sea spray into space. By understanding the composition of the...

Cassini Reveals Saturn’s Ultraviolet Auroras in Unprecedented Detail

Jan 15, 2020 by News Staff

At the end of its mission in 2017, NASA’s Cassini spacecraft performed a set of ‘Grand Finale’ orbits bringing it closer to Saturn than ever before....

The global geologic map of Titan. Image credit: NASA / JPL-Caltech / ASU.

Researchers Create Global Geologic Map of Saturn’s Moon Titan

Nov 19, 2019 by News Staff

Using radar and infrared data from NASA’s Cassini orbiter spacecraft, a team of planetary geologists has identified and mapped the major geological units...

The moons of our Solar System are brimming with unusual landscapes. However, sometimes they look a little more familiar, as in this new radar image from the Cassini orbiter. The image shows dark streaks carved into dunes reminiscent of those we might find on a beach on Earth, or raked with flowing lines in a Japanese Zen garden — but this scene is actually taking place on Saturn’s moon Titan. While our sand is composed of silicates, the ‘sand’ of these alien dunes is formed from grains of organic materials about the same size as particles of our beach sand. The small size and smoothness of these grains means that the flowing lines carved into the dunes show up as dark to the human eye. While previous images have spotted these eerily familiar patterns on Titan's dunes, this new image (colorized) shows them in greater detail. The image was obtained by Cassini's radar mapper on July 10, 2013. The vertical seam near the center is an artifact of radar image data processing. Image credit: NASA / JPL-Caltech / Sci-News.com.

Researchers Unravel Origin and Chemical Composition of Titan’s Mysterious Dunes

Oct 22, 2019 by News Staff

Vast longitudinal dunes up to 330 feet (100 m) in height in the equatorial deserts of Saturn’s moon Titan are the Solar System’s most monumental surface...

This artist’s painting of the south polar region of Enceladus shows massive jets of water ice being blasted into space. Image credit: Karl Kofoed / NASA.

Scientists Find Low-Mass Organic Compounds in Ice Grains from Enceladus’ Plume

Oct 3, 2019 by News Staff

Saturn’s moon Enceladus is erupting a plume of gas and ice grains from its south pole. According to new research using data from NASA’s Cassini mission,...

NASA’s Cassini spacecraft in orbit around Saturn. Image credit: NASA / JPL-Caltech.

Saturn’s Rings are as Old as Solar System Itself, Study Suggests

Sep 18, 2019 by News Staff

The famous ring system of Saturn may be much older than some planetary scientists think, according to a new study published in the journal Nature Astronomy. NASA’s...

This artist’s concept of a lake at the north pole of Titan illustrates raised rims and rampartlike features such as those seen by NASA’s Cassini spacecraft around the moon’s Winnipeg Lacus. New research using Cassini radar data and modeling proposes that lake basins like these are likely explosion craters, which could have formed when liquid molecular nitrogen deposits within the crust warmed and quickly turned to vapor, blowing holes in the moon’s crust. This would have happened during a warming event (or events) that occurred in a colder, nitrogen-dominated period in Titan’s past. The study may provide evidence of these cold periods in Titan’s past, followed by a relative warming to conditions like those of today. Although Titan is frigid compared to Earth, methane in the atmosphere provides a greenhouse effect that warms the moon’s surface. Image credit: NASA / JPL-Caltech.

Titan’s Small Methane-Filled Lakes are Explosion Craters: Study

Sep 11, 2019 by News Staff

Small methane-filled lakes on the surface of Titan were likely formed by explosive, pressurized nitrogen just under the hazy moon’s surface, according...

$This enhanced-color view of Enceladus is largely of the southern hemisphere and includes the south polar terrain at the bottom of the image. Ancient craters remain somewhat pristine in some locales, but have clearly relaxed in others. Northward-trending fractures, likely caused by a change in the moon’s rate of rotation and the consequent flattening of the moon’s shape, rip across the southern hemisphere. The south polar terrain is marked by a striking set of ‘blue’ fractures and encircled by a conspicuous and continuous chain of folds and ridges, testament to the forces within Enceladus that have yet to be silenced. The mosaic was created from 21 false-color frames taken during Cassini’s close approaches to Enceladus on March 9 and July 14, 2005. Images taken using filters sensitive to UV, visible and IR light (spanning wavelengths from 338 to 930 nm) were combined to create the individual frames. Image credit: NASA / JPL / Space Science Institute.$

Enceladus’ Ocean Contains High Concentrations of Carbon Dioxide and Hydrogen, Scientists Say

Jun 25, 2019 by News Staff

Saturn’s small icy moon Enceladus contains a global subsurface ocean. According to new research from the University of Washington, the ice-covered ocean...

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