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Search Results for: rsl
RSLs are flowing sand, not water?
Dark features previously proposed as evidence for significant liquid water flowing on Mars have now been identified as granular flows, where sand and dust move rather than liquid water, according to a new article published in Nature Geoscience by the … Continue reading
No damp ground found at RSL seasonal streaks
Seasonal dark streaks on Mars that have become one of the hottest topics in interplanetary research don’t hold much water, according to the latest findings from a NASA spacecraft orbiting Mars. The new results from NASA’s Mars Odyssey mission rely … Continue reading
Posted in Reports
Tagged Arizona State University, ASU, Mars Odyssey, NASA, recurring slope lineae, RSL, THEMIS, Thermal Emission Imaging System
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Do salts draw water from atmosphere for RSLs?
Puzzles persist about possible water at seasonally dark streaks on Martian slopes, according to a new study of thousands of such features in the Red Planet’s largest canyon system. The study published today [in the Journal of Gephysical Research] investigated … Continue reading
Posted in Reports
Tagged Coprates Chasma, Melas Chasma, recurring slope lineae, RSL, salts, Valles Marineris
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Curiosity may hunt for RSLs on Mt. Sharp
Ever since it was announced that there may be evidence of liquid water on present-day Mars, NASA scientists have wondered how best to further investigate these long, seasonally changing dark streaks in the hope of finding evidence of life — … Continue reading
Posted in Reports
Tagged Aeolis Mons, Curiosity, Gale Crater, Mars Science Laboratory, Mount Sharp, MSL, NASA, recurring slope lineae, Remote Micro-Imager, RMI, RSL
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RSLs are caused by flows of liquid brines
New findings from NASA’s Mars Reconnaissance Orbiter (MRO) provide the strongest evidence yet that liquid water flows intermittently on present-day Mars. Using an imaging spectrometer on MRO, researchers detected signatures of hydrated minerals on slopes where mysterious streaks are seen … Continue reading
Posted in Reports
Tagged calcium perchlorate, Compact Reconnaissance Imaging Spectrometer for Mars, CRISM, magnesium chlorate, magnesium perchlorate, Mars Reconnaissance Orbiter, MRO, NASA, perchlorates, recurring slope lineae, RSL
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HiRISE image: RSLs and colorful fans along Coprates Chasma ridge
This site along a Coprates Chasma ridge shows what are called recurring slope lineae (or RSL) on generally north-facing slopes in northern summer/southern winter (latitude 12.9 degrees S, longitude 295.5 degrees E). With an animation constructed from multiple co-located images, … Continue reading
Posted in Reports
Tagged Coprates Chasma, High Resolution Imaging Science Experiment, HiRISE, Mars Reconnaissance Orbiter, MRO, NASA, recurring slope lineae, RSL, University of Arizona, Valles Marineris
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HiRISE: Slope monitoring on Ganges Mensa
Slope monitoring on Ganges Mensa. An existing stereo pair shows dark lineations that look very much like recurring slope lineae, but did not exhibit any observed growth within a 1-month interval of the stereo pair, unlike RSL. This picture is … Continue reading
Posted in Reports
Tagged Ganges Mensa, High Resolution Imaging Science Experiment, HiPOD, HiRISE, HiRISE Picture of the Day, Mars Reconnaissance Orbiter, mass wasting, MRO, NASA, recurring slope lineae, RSL, University of Arizona
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Recurring slope lineae: Brines more likely
[Editor’s note: From a paper by Christian Huber and three co-authors recently published in Icarus.] Physical models and predictions for Recurring Slope Lineae formed by wet and dry processes • We test dynamic models of wet and dry RSL propagation … Continue reading
What makes martian methane vanish so quickly?
The processes behind the release and consumption of methane on Mars have been discussed since methane was measured for the first time for approximately 15 years ago. Now, an interdisciplinary research group from Aarhus University has proposed a previously overlooked … Continue reading
HiRISE: Slope monitoring
Slope monitoring. The recurring slope lineae (RSL) in this image are large and have high contrast. Most importantly, we see multiple examples of RSL flowing on bedrock, alternating between bedrock and regolith and bedrock and regolith, and regolith only. Do … Continue reading
Posted in Reports
Tagged High Resolution Imaging Science Experiment, HiPOD, HiRISE, HiRISE Picture of the Day, Mars Reconnaissance Orbiter, Melas Chasma, MRO, NASA, recurring slope lineae, RSL, University of Arizona
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