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Post by theshee on Mar 26, 2014 7:52:08 GMT 10
At right, a new gully appears in pictures of the same region of Terra Sirenum on Mars. The picture at left was taken in November 2010, and the right in May 2013. Pictures obtained from the High Resolution Imaging Science Experiment (HiRISE) camera on NASA’s Mars Reconnaissance Orbiter. Check out the groove! In the blink of a geological lifetime, a new gully has appeared on the planet Mars. These images from NASA's Mars Reconnaissance Orbiter show a new channel in the southern hemisphere region of Terra Siernum that appeared between November 2010 and May 2013. While there's a lot of chatter about water on Mars, this particular feature is likely not due to that liquid, the agency added. "Gully or ravine landforms are common on Mars, particularly in the southern highlands. This pair of images shows that material flowing down from an alcove at the head of a gully broke out of an older route and eroded a new channel," NASA stated. It's unclear in what season the activity occurred because the observations took place more than a Martian year apart, NASA added. These ravines tend to happen in the southern highlands and other mid-latitude regions on Mars. "Before-and-after HiRISE pairs of similar activity at other sites demonstrate that this type of activity generally occurs in winter, at temperatures so cold that carbon dioxide, rather than water, is likely to play the key role," the agency said. Last week, the agency also announced that MRO recovered from an unplanned computer swap that put the spacecraft into safe mode. Incidents of this nature have happened four times before, the agency noted. link
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Post by Wes Gear on Mar 26, 2014 21:45:53 GMT 10
Maybe frozen carbon dioxide caused it by expansion.
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Post by Rareclan on Mar 29, 2014 1:33:15 GMT 10
lol It's the opposite to the face on mars, first you could see it then you couldn't A celestial body with climate change, we may yet find out what climatic changes occurred whilst inhabited on the surface
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Post by quercus on Mar 29, 2014 2:32:53 GMT 10
Looking at the original photo from Nov 2010, there was clearly already something going on in that area, so did a minor tremor just disturb a build up of dust and crap in an existing fissure perhaps.
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Post by brillbilly on Mar 29, 2014 3:41:39 GMT 10
If that gully is Horizontal,then i cant understand latteral movement? ??... Mars is never Dead!
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Post by theshee on Mar 29, 2014 7:37:18 GMT 10
Looking at the original photo from Nov 2010, there was clearly already something going on in that area, so did a minor tremor just disturb a build up of dust and crap in an existing fissure perhaps. Yep, you sure can see that.
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