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Share Twit Share Email. April 22, This photo taken by the Cassini spacecraft shows Titan's golden, smog-like atmosphere and complex layered hazes that appear as a luminous ring around the planet-sized moon. Methane could be to Titan what water is to Earth.
Credit: Karl Kofoed. Two degraded impact craters on Xanadu. The image on the left shows an impact crater discovered in being compared to an impact crater that Cassini found in right. Explore further. Source: Astrobio.
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Temperature of gas in a cluster 20 hours ago. Maximum mass of a neutron star Nov 09, Related Stories. Jul 27, Oct 19, Titan gives clues to Earth's early history Dec 01, Jan 28, Dec 08, Recommended for you. SpaceX crew launch marks space travelers in 60 years Nov 11, Nov 10, Impact craters are one of the few geologic features that expose material from the interior, providing a rare opportunity to understand the subsurface composition of Titan.
Six of the craters in the study are located in the equatorial dune fields and three in the midlatitude plains. RADAR obtained microwave emissivity data — which is a measure of how effective a surface is at emitting energy — and could probe the surface to depths of tens of centimetres revealing details on the subsurface composition. Areas with lower emissivity on Titan are thought to indicate water ice, while higher emissivity indicates an organic-rich layer.
The VIMS data can be used to look at the thin 'veil' that covers the surface. Using VIMS to study the surface of Titan requires an understanding of the methane absorption and haze in the atmosphere, which was provided by the Huygens data and the use of a radiative transfer code.
The team then used a new mixing model to study the chemical composition of the crater floors and ejecta blankets i. The results showed that the dune craters and the plain craters have two different types of composition. The plain craters have a mix of organics and are enriched with water ice, whereas the dune craters have mainly organic material and no water ice.
Both types of craters have been altered compositionally showing two different evolution routes. This suggests that there is a difference in the surface layer between the floor and ejecta that doesn't affect the subsurface composition. It is possible that this is due to the dune craters becoming infilled with a fine layer of sand sediment. The composition of craters and ejecta is generally the same for the plain craters, which the authors say suggests that the plain craters are being "cleaned" of sediment.
This could be caused by fluvial erosion, and agrees with previous assumptions that more rain falls in the higher latitudes of Titan. There are two craters which are exceptions to the rule; Menrva and Sinlap. Dione Close-Up Raw image. This is an artist concept of the ring of debris that may orbit Saturn's second-largest moon, Rhea. The suggested disk of solid material is exaggerated in density here for clarity.
Due to a dec Artist Concept of Rhea Rings. This mosaic, created from images taken by NASA's Cassini spacecraft during its closest flyby of Saturn's moon Mimas, looks straight at the moon's huge Herschel Crater and reveals new insights about Examining Herschel Crater.
Six Voyager images fill Saturn's rings create a brilliant halo around the turbulent giant planet. Here, the Cassini spacecraft looks into Saturn's clouds using a spectral filter sensitive to absorption by methane. Light t Masked by Methane. The smaller crater, offset from the center of the image, with a smaller crater on its rim is Tuccia crater. Tuccia and Eusebia Craters. Patches of bright material can be seen on the walls of a relatively fresh crater on Ceres in this view from NASA's Dawn spacecraft.
Long, thin streamers of cloud arc gracefully across this view of Saturn's southerly latitudes. Analysis of images like this should lead scientists to a new understanding of cloud height variations Seeking the Cloud Tops. The next full Moon is the Beaver Moon, and there will be a near-total lunar eclipse. Full Moon Guide: November - December These cosmic ribbons of gas have been left behind by a titanic stellar explosion called a supernova.
When it begins work in , Roman will yield results that would be impossible to achieve using existing telescopes. Mocha Swirls in Jupiter's Turbulent Atmosphere.
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