{"id":6428,"date":"2014-02-10T20:10:29","date_gmt":"2014-02-10T20:10:29","guid":{"rendered":"http:\/\/hobbyspace.com\/Blog\/?p=6428"},"modified":"2014-02-10T20:10:29","modified_gmt":"2014-02-10T20:10:29","slug":"mars-slippery-slopes-names-for-old-hills","status":"publish","type":"post","link":"https:\/\/hobbyspace.com\/Blog\/?p=6428","title":{"rendered":"Mars : Slippery slopes + Names for old hills"},"content":{"rendered":"

A couple of Mars items today:<\/p>\n

NASA Mars Orbiters See Clues to Possible Water Flows<\/a><\/strong><\/p>\n

\"Color-CodedThis image combines a photograph of seasonal dark flows on a Martian slope<\/em>
\n with a grid of colors based on data collected by a mineral-mapping spectrometer <\/em>
\nobserving the same area. Image credit: NASA\/JPL-Caltech\/UA\/JHU-APL<\/em>
\n\u00a0\u203a Full image and caption<\/a><\/em><\/p>\n

NASA spacecraft orbiting Mars have returned clues for understanding seasonal features that are the strongest indication of possible liquid water that may exist today on the Red Planet.<\/p>\n

The features are dark, finger-like markings that advance down some Martian slopes when temperatures rise. The new clues include corresponding seasonal changes in iron minerals on the same slopes and a survey of ground temperatures and other traits at active sites. These support a suggestion that brines with an iron-mineral antifreeze, such as ferric sulfate, may flow seasonally, though there are still other possible explanations.<\/p>\n

Researchers call these dark flows “recurring slope lineae.” As a result, RSL has become one of the hottest acronyms at meetings of Mars scientists.<\/p>\n

“We still don’t have a smoking gun for existence of water in RSL, although we’re not sure how this process would take place without water,” said Lujendra Ojha, a graduate student at the Georgia Institute of Technology, Atlanta, and lead author of two new reports about these flows. He originally discovered them while an undergraduate at the University of Arizona, Tucson, three years ago, in images from the High Resolution Imaging Science Experiment (HiRISE) camera on NASA’s Mars Reconnaissance Orbiter.<\/p>\n

Ojha and Georgia Tech assistant professor James Wray more recently looked at 13 confirmed RSL sites using images from the same orbiter’s Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) instrument. They searched for minerals that RSL might leave in their wake as a way of understanding the nature of these features: water-related or not?<\/p>\n

Continue to article…<\/em><\/a><\/p>\n

===<\/p>\n

And Bill Dunford writes about some newly named hills on earth and includes several impressive images:\u00a0New Hills, Old Secrets – \u00a0The Planetary Society<\/a><\/p>\n

There is a new set of hills on Mars. Well, the hills themselves aren’t new, but they have a new name. In the past couple of months, the International Astronomical Union has officially designated names for dozens of craters, cliffs, seas, and mountains on four different worlds. They include places like Nakuru Lacuna on Saturn’s moon Titan, Neptunalia Dorsa on the asteroid Vesta, and Mercury’s Lennon Crater, named for John.<\/em><\/p>\n

Continue…<\/a><\/em><\/p>\n

\"Hidden<\/a>Hidden Gullies<\/strong>:\u00a0Overhanging cliffs near Simois Colles on Mars partially conceal<\/em>
\n a set of gullies that appear to originate at specific rock layers. Imaged by the<\/em>
\n HiRISE camera on board the Mars Reconnaissance Orbiter. The area shown<\/em>
\n is approximately one kilometer wide. Credits:\u00a0NASA \/ JPL \/ UA<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

A couple of Mars items today: NASA Mars Orbiters See Clues to Possible Water Flows This image combines a photograph of seasonal dark flows on a Martian slope with a grid of colors based on data collected by a mineral-mapping spectrometer observing the same area. Image credit: NASA\/JPL-Caltech\/UA\/JHU-APL \u00a0\u203a Full image and caption NASA spacecraft … Continue reading Mars : Slippery slopes + Names for old hills<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[78,13],"tags":[],"class_list":["post-6428","post","type-post","status-publish","format-standard","hentry","category-mars","category-space-science"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p34aWK-1FG","jetpack-related-posts":[{"id":11482,"url":"https:\/\/hobbyspace.com\/Blog\/?p=11482","url_meta":{"origin":6428,"position":0},"title":"Researchers see evidence for liquid water flows on Martian surface","author":"TopSpacer","date":"September 28, 2015","format":false,"excerpt":"The NASA briefing today\u00a0about a \"Mars Mystery\" will present\u00a0evidence for seasonal\u00a0flows\u00a0of liquid water, heavily salted with perchlorates that raise the boiling temperature, down the slopes of some hills on the Martian surface. 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Organics are the building blocks of all\u2026","rel":"","context":"In "Mars"","block_context":{"text":"Mars","link":"https:\/\/hobbyspace.com\/Blog\/?cat=78"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/hobbyspace.com\/Blog\/wp-content\/uploads\/2018\/06\/pia198081-1024x624.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":5626,"url":"https:\/\/hobbyspace.com\/Blog\/?p=5626","url_meta":{"origin":6428,"position":3},"title":"The dynamism of Mars on display in HiRISE images from MRO spacecraft","author":"TopSpacer","date":"December 11, 2013","format":false,"excerpt":"When the first fly-by spacecraft images of Mars were seen in the 1960s, the planet looked as static and frozen in time as the Moon. 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