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The power of HiRISE
Stu
post Apr 7 2010, 11:09 PM
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... and a new, rather gorgeous avalanche shot...

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(cropped and colourised from ESP_016423_2640 )



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nprev
post Apr 8 2010, 12:18 AM
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Those are both exceptional images, Stu, thanks! Spirit's 'wings' are clearly resolved, amazing!


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ElkGroveDan
post Apr 8 2010, 03:30 AM
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QUOTE (Stu @ Apr 7 2010, 02:50 PM) *
Today's batch of new releases includes an image of Spirit's landing site,

Looking like a frozen house fly stuck to a frosty window.


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Explorer1
post Apr 8 2010, 04:01 AM
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So this is what, the 3rd avalanche caught in the act? Are we sure MRO has no motion-sensor onboard? It sure seems that way!
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nprev
post Apr 8 2010, 04:15 AM
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The fact that MRO doesn't have any motion detection capability is testimony to the (apparently) astonishingly high rate of occurrence of these events.

Really interesting stuff happening here. Is the Cap being replenished anywhere near as rapidly as its edges are eroding?


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centsworth_II
post Apr 8 2010, 06:05 AM
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QUOTE (Explorer1 @ Apr 7 2010, 11:01 PM) *
So this is what, the 3rd avalanche caught in the act?....
You have a short memory. laugh.gif

In this thread a few weeks ago, it was revealed that there are avalanches in almost every MRO image during the 'avalanche season', and five avalanches from one image were shown.
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Tom Gwilym
post Apr 8 2010, 07:27 AM
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Just about to go to bed, then I come across these new images. Can't sleep!
Very cool!
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OWW
post Apr 9 2010, 12:30 PM
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Crater near graben in Syria Mons: http://hirise.lpl.arizona.edu/ESP_016529_1350

Was the smooth stuff deposited before or after the ripples formed?


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OWW
post Apr 9 2010, 01:18 PM
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square crater(?). http://hirise.lpl.arizona.edu/ESP_016537_1425

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sariondil
post Apr 9 2010, 02:56 PM
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Probably not a square crater, but an outcrop of folded stratified rock. There are several more U-shaped outcrops in the vicinity of this one.
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Stu
post Apr 10 2010, 07:13 AM
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"Baby" avalanche spotted on an image ( ESP_016449_2650 ) in the latest big image release...

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schaffman
post Apr 11 2010, 01:21 PM
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QUOTE (OWW @ Apr 9 2010, 08:30 AM) *
Crater near graben in Syria Mons: http://hirise.lpl.arizona.edu/ESP_016529_1350

Was the smooth stuff deposited before or after the ripples formed?

Looks like the smooth stuff formed after the ripples. The smooth stuff resembles the material in the middle of the graben. (Note the presence of subdued craters in both units). This suggests that the smooth unit once covered a more extensive area and has been eroded away, exhuming an ancient rippled lanscape. This would mean that the ripples formed long ago and are most likely inactive today. Any other interpretations?
Tom
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Explorer1
post May 11 2010, 01:30 AM
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Oh wow!

http://www.universetoday.com/2010/05/10/la...y-impact-event/

Impact event thought to have caused an avalanche! Amazing picture, as usual!
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nprev
post May 11 2010, 02:14 PM
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Interesting, but I dunno if I buy it. Why isn't there the usual dark ejecta apron around the postulated recent crater? Also, there's something not quite right about the diffuse upper boundary of the streak; that also seems atypical.


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Tesheiner
post May 11 2010, 02:56 PM
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QUOTE (nprev @ May 11 2010, 04:14 PM) *
Why isn't there the usual dark ejecta apron around the postulated recent crater?

Because it was covered by the dust from the avalanche? My 2c.
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