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24 Jan 2013 |
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Thawing 'Dry Ice' Drives Groovy Action on Mars
Researchers using NASA's Mars Reconnaissance Orbiter see seasonal changes on far-northern Martian sand dunes caused by warming of a winter blanket of frozen carbon dioxide.
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8 Jan 2013 |
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Cassini Suggests Icing on a Lake
A new paper by scientists on NASA's Cassini mission finds that blocks of hydrocarbon ice might decorate the surface of existing lakes and seas of liquid hydrocarbon on Saturn's moon Titan. The presence of ice floes might explain some of the mixed readings Cassini has seen in the reflectivity of the surfaces of lakes on Titan.
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21 Dec 2012 |
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A Winter Wonderland on Mars
Fall and winter temperatures bring changes to Mars as the carbon dioxide atmosphere turns to dry ice frost that clings to the surface. The Mars Reconnaissance Orbiter used its powerful cameras and spectrometers to capture detailed pictures and measurements of wintry scenes of nature's beauty at work on the Red Planet.
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6 Dec 2012 |
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Titan's Gravity Indicates a Thicker, Uneven Icy Crust
It's long been speculated that Saturn's moon Titan may be harboring a global subsurface ocean below an icy crust, based on measurements of its rotation and orbit by NASA's Cassini spacecraft. Titan exhibits a density and shape that indicates a pliable liquid internal layer -- an underground ocean -- possibly composed of water mixed with ammonia, a combination that would help explain the consistent amount of methane found in its thick atmosphere. Now, further analysis of Cassini gravity measurements by a Stanford University team has shown that Titan's ice layer is thicker and less uniform than originally estimated, indicating a more complex internal structure ...
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29 Nov 2012 |
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MESSENGER Finds New Evidence for Water Ice at Mercury's Poles
New observations by the MESSENGER spacecraft provide compelling support for the long-held hypothesis that Mercury harbors abundant water ice and other frozen volatile materials in its permanently shadowed polar craters.
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28 Sep 2012 |
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Ice May Lurk in Shadows Beyond Moon's Poles
Water ice on the moon may be more widespread than previously thought. Using LRO data, permanent shadows have been spotted far from the lunar poles, expanding the number of sites that would be good candidates for ice to exist.
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11 Sep 2012 |
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NASA Orbiter Observations Point To 'Dry Ice' Snowfall On Mars
NASA's Mars Reconnaissance Orbiter data have given scientists the clearest evidence yet of carbon-dioxide snowfalls on Mars. This reveals the only known example of carbon-dioxide snow falling anywhere in our solar system.
"These are the first definitive detections of carbon-dioxide snow clouds," said the report's lead author, Paul Hayne of NASA's Jet Propulsion Laboratory in Pasadena, Calif. "We firmly establish the clouds are composed of carbon dioxide -- flakes of Martian air -- and they are thick enough to result in snowfall accumulation at the surface.
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30 Aug 2012 |
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Walls of Lunar Crater May Hold Patchy Ice, LRO Radar Finds
Small patches of ice could make up at most five to ten percent of material in walls of Shackleton crater.
NASA's Lunar Reconnaissance Orbiter has been studying the Moon since June 2009. Credit: NASA Scientists using the Mini-RF radar on NASA's Lunar Reconnaissance Orbiter (LRO) have estimated the maximum amount of ice likely to be found inside a permanently shadowed lunar crater located near the Moon's South Pole. As much as five to ten percent of material, by weight, could be patchy ice, according to the team of researchers led by Bradley Thomson at Boston University's Center for Remote Sensing, in Massachusetts.
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21 Jun 2012 |
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LRO Finds More Evidence for Ice in Shackleton Crater Near the Moon's South Pole
According to data from NASA's Lunar Reconnaissance Orbiter (LRO), ice may make up as much as 22 percent of the surface material in Shackleton crater at the Moon's south pole.
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