The power of HiRISE |
The power of HiRISE |
 Oct 9 2008, 08:04 PM
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 The Poet Dude  Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60  |
Busy preparing a new Outreach talk here, and have been trying to find some images to illustrate the "power" of HiRISE for a non-technical audience. Playing about with - sorry, carefully looking at the images on - the addictive Mars Global Data site I found a cute landslide on Xanthe Terra that does the trick nicely. Using the IAS Viewer you can zoom in on the boulders carried down the slope by the landslide and even see cracks and splits in them... unbelievable...!
Anyone else got any fave examples? -------------------- |
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Oct 9 2008, 09:20 PM
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Senior Member Group: Members Posts: 1583 Joined: 14-October 05 From: Vermont Member No.: 530 |
Emily's series about White Rock is good, too.
 (Course now that I go looking, it might not have gotten to HiRise!) http://www.planetary.org/blog/archive/35/ |
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Oct 9 2008, 09:35 PM
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 Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
I did -- but you remind me I promised to wrap this up, and I haven't delivered on that promise yet...
http://www.planetary.org/blog/article/00001419/ --Emily -------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
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Oct 9 2008, 10:29 PM
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#4
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The Poet Dude Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60 |
Yep, Emily's "White Rock" sequence is an outstanding piece of work, to be sure. I'm not comparing this Xanthe sequence to it at all; I was just struck by the detail visible in those shattered rocks
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Oct 10 2008, 03:14 AM
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#5
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Member Group: Members Posts: 599 Joined: 26-August 05 Member No.: 476 |
As in Emily's presentation, consider adding scale bars to the images?
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Oct 10 2008, 08:10 AM
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Member Group: Members Posts: 293 Joined: 22-September 08 From: Spain Member No.: 4350 |
Spider:
http://hirise.lpl.arizona.edu/PSP_003087_0930 The famous avalanche: http://hirise.lpl.arizona.edu/PSP_007338_2640 Rolling stones: http://hirise.lpl.arizona.edu/images/2008/...47_1895_cut.jpg Frost covered gullies: http://hirise.lpl.arizona.edu/PSP_001552_1410 |
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Oct 10 2008, 08:48 AM
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 Member Group: Members Posts: 593 Joined: 20-April 05 Member No.: 279 |
QUOTE (Fran Ontanaya @ Oct 10 2008, 09:10 AM)  Rolling stones: http://hirise.lpl.arizona.edu/images/2008/...47_1895_cut.jpg I've not seen the image on the right before - I make that an Evel Knieval-like ~17m jump across the crater. Imagine being sat in the bottom of that as a 4m rock zips over your head... Andy |
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Nov 28 2008, 09:08 PM
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 Member Group: Members Posts: 568 Joined: 20-April 05 From: Silesia Member No.: 299 |
I found another unusual boulder track. You can see clearly how increased speed of the boulder on the slope. Jumps were increasingly longer, even a few dozen meters.
Hills Northeast of Mojave Crater (PSP_008430_1895) - general view
Hills Northeast of Mojave Crater (PSP_008430_1895) - "Rolling Stone"
Boulder in the final position
I was very skeptical before Mars Reconnaissance Orbiter mission. Another mission to Mars similar to the Mars Global Surveyor mission, what's interesting in this. I was wrong, MRO is the ultimate achievement in the field of imaging of Mars from orbit. -------------------- Free software for planetary science (including Cassini Image Viewer).
http://members.tripod.com/petermasek/marinerall.html |
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Nov 28 2008, 09:23 PM
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Senior Member Group: Members Posts: 1074 Joined: 21-September 07 From: Québec, Canada Member No.: 3908 |
Judging from the freshness of the tracks, this event must have happened quite recently. Did MRO by any chance image this area before?
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Nov 28 2008, 11:18 PM
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Member Group: Members Posts: 713 Joined: 30-March 05 Member No.: 223 |
QUOTE (peter59 @ Nov 28 2008, 10:08 PM) MRO is the ultimate achievement in the field of imaging of Mars from orbit. Yes, Absolutely. MRO almost "feels" more like viewing the martian landscape out of a helicopter window than from orbit ... When I was younger I have always been dreaming about future Mars missions involving balloons or airplanes and wondered how phantastic a feeling it would be to view all the images and vistas those aircrafts would take from above ... finally bridging the gap in scale between the ground level images of the landers (Viking) and the very low resolution views of the orbiters ... Now we don't have martian airplanes yet but we have MRO ... and it's even better for it's global scope of operation
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Nov 29 2008, 04:33 AM
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 Member Group: Members Posts: 753 Joined: 23-October 04 From: Greensboro, NC USA Member No.: 103 |
I would love to see an anaglyph of that scene!
-------------------- Jonathan Ward
Manning the LCC at http://www.apollolaunchcontrol.com |
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Nov 29 2008, 01:37 PM
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#12
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 Member Group: Members Posts: 710 Joined: 28-September 04 Member No.: 99 |
QUOTE (Nirgal @ Nov 29 2008, 12:18 AM) Yes, Absolutely. MRO almost "feels" more like viewing the martian landscape out of a helicopter window than from orbit ... Interesting thought. Is there a way to calculate at what altitude a human (eye) has the same resolution as HiRise? Is it comparable to a helicopter flight or looking down through the clouds from an airliner? |
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Nov 29 2008, 03:21 PM
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#13
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 Member Group: Admin Posts: 976 Joined: 29-September 06 From: Pasadena, CA - USA Member No.: 1200 |
QUOTE (OWW @ Nov 29 2008, 05:37 AM) Interesting thought. Is there a way to calculate at what altitude a human (eye) has the same resolution as HiRise? Is it comparable to a helicopter flight or looking down through the clouds from an airliner? Assuming that the human eye visual acuity is about 0.59 arc min and HiRISE at 0.25m/pixel you get an altitude of about 1456m or about 4800' (if I did my math correctly). Paolo -------------------- Disclaimer: all opinions, ideas and information included here are my own,and should not be intended to represent opinion or policy of my employer.
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Nov 29 2008, 03:48 PM
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Member Group: Members Posts: 877 Joined: 7-March 05 From: Switzerland Member No.: 186 |
QUOTE (peter59 @ Nov 28 2008, 10:08 PM)
What's circa the size of that boulder? 3x4 meters? -------------------- |
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Dec 1 2008, 10:33 PM
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 Director of Galilean Photography Group: Members Posts: 896 Joined: 15-July 04 From: Austin, TX Member No.: 93 |
There was some concern before that HiRise's resolution would actually be greater than the Mars atmosphere would allow due to twinkling. Has anyone taken a look at that again? What's the new maximum theoretical resolution from orbit? Less than 5cm?
-------------------- Space Enthusiast Richard Hendricks
-- "The engineers, as usual, made a tremendous fuss. Again as usual, they did the job in half the time they had dismissed as being absolutely impossible." --Rescue Party, Arthur C Clarke Mother Nature is the final inspector of all quality. |
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Dec 1 2008, 10:49 PM
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#16
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Member Group: Members Posts: 713 Joined: 30-March 05 Member No.: 223 |
QUOTE (hendric @ Dec 1 2008, 11:33 PM) There was some concern before that HiRise's resolution would actually be greater than the Mars atmosphere would allow due to twinkling. Has anyone taken a look at that again? What's the new maximum theoretical resolution from orbit? Less than 5cm? I don't know the exact numbers but from looking at many hundreds of HiRise image it does "feel" like the highest resolution level indeed lacks some of the "crispness" of the larger scale zoom levels ... don't know if this is due to atmosphere twinkling or other optical and/or image processing effects though .... |
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| Guest_Sunspot_* |
Dec 2 2008, 09:08 AM
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Guests |
The camera developed a fault not long after science operations began. There has been an obvious deterioration in image quality as a result - images are much grainier and not as crisp.
Look at this first picture obtained of Spirit at Home Plate
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Dec 2 2008, 02:44 PM
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 Member Group: Members Posts: 267 Joined: 5-February 06 Member No.: 675 |
The reported degradation of the camera has been found to be minimum in past discussions; see, for example:
QUOTE (tuvas @ Feb 12 2007, 09:23 AM) That is a large exaggeration. Channel 1 of IR10 almost has completely stopped working, but channel 0 is working just fine. Looking at the articles that have been posted, I would point you to the space.com article and state that it seems to be the most informative and accurate, except for it's title. Quoting two parts of it which are totally true: QUOTE In late November 2006, the HiRISE team noticed a significant increase in noise, such as bad pixels, in one of its 14 camera detector pairs. Another detector that developed the same problem soon after MRO’s launch in August 2005 has worsened. Images from the spacecraft camera last month showed the first signs of this problem in five other detectors. QUOTE That warming, McEwen told SPACE.com, is sufficient to reduce the HiRISE problem to minor dropouts—easily interpolated—in RED 9, and no problems at all in other charge couple devices within the instrument except an infrared receiver channel (IR10 channel 1), where instrument specialists first saw this problem after MRO’s blastoff from Florida in August 2005. These two statements are 100% correct. Just thought I'd point that out. and QUOTE (remcook @ Aug 27 2007, 04:45 AM) http://www.spaceflightnow.com/news/n0708/26mro/ "Alfred McEwen of the University of Arizona, Tucson, principal investigator for the camera, said, "I'm happy to report that there has been no detectable degradation over the past five months." " "McEwen said, "Given the stability we've seen and understanding the nature of the problem, we now expect HiRISE to return high-quality data for years to come." " yay! Steve M |
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Dec 10 2008, 02:39 PM
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The Poet Dude Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60 |
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Dec 10 2008, 04:18 PM
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 Senior Member Group: Members Posts: 1281 Joined: 18-December 04 From: San Diego, CA Member No.: 124 |
A picture is worth 140 characters!
-------------------- Lyford Rome
"Zis is not nuts, zis is super-nuts!" Mathematician Richard Courant on viewing an Orion test |
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Dec 11 2008, 08:46 PM
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The Poet Dude Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60 |
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Dec 11 2008, 09:01 PM
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Member Group: Members Posts: 710 Joined: 28-September 04 Member No.: 99 |
QUOTE (Sunspot @ Dec 2 2008, 10:08 AM) The camera developed a fault not long after science operations began. There has been an obvious deterioration in image quality as a result - images are much grainier and not as crisp. Look at this first picture obtained of Spirit at Home Plate Many of the recent images are very noisy indeed. Others however, are still very good. This image of Gusev was taken just three months ago. http://hirise.lpl.arizona.edu/PSP_010097_1655
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Dec 11 2008, 10:20 PM
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Member Group: Members Posts: 470 Joined: 24-March 04 From: Finland Member No.: 63 |
AFAIR the noise problem was present only in some of the CCDs in Hirise's CCD array. Also the problem was remedied somewhat by warming(?) the CCDs.
I think the atmospheric conditions on Mars play a bigger role. That could be seen in some of the images taken during the major dust storm around rovers' regions. -------------------- Antti Kuosmanen
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Dec 21 2008, 07:09 PM
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The Poet Dude Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60 |
Inbetween writing Christmas cards and eating mince pies today I've been playing about with the wonderfully addictive website http://global-data.mars.asu.edu that lets you explore Mars through the eyes of spaceprobes from Viking to MRO. I like just dipping in at random, playing a kind of "martian lucky dip" if you like, and seeing what turns up. I just found something interesting... well, I think it is.
Image http://hirise.lpl.arizona.edu/PSP_005665_1800 is entitled "Change detection in Dark spot", so I thought it was worth a look... change is always a good thing on Mars, after all... into IAS Viewer and fine, looked just like one of those "fresh impact craters" to me - a dark "splash" of colour on a bright background. Zoom - and yep, right in the centre there's a small cluster of craters. But that's not what caught my eye - what made me go "hmmm" were the many dark lines and trails coming off the terrain around it. There are hundreds of them! I'm just puzzled what I'm seeing... this isn't a polar area, so the light terrain can't be frost- or snow-covered, yet it looks like something is coming out from underneath a surface layer..?
Anyway, just thought it was interesting - note: not odd, interesting! - and wondered if anyone has any thoughts about it. HiRISE. What a fantastic camera! -------------------- |
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Dec 21 2008, 07:11 PM
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 Senior Member Group: Admin Posts: 4763 Joined: 15-March 05 From: Glendale, AZ Member No.: 197 |
Stu, do those lines appear throughout the region or just in the immediate proximity to the new craters?
-------------------- If Occam had heard my theory, things would be very different now.
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Dec 21 2008, 07:16 PM
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The Poet Dude Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60 |
QUOTE (ElkGroveDan @ Dec 21 2008, 07:11 PM) Stu, do those lines appear throughout the region or just in the immediate proximity to the new craters? Best to take a look yourself Dan... they're more common close to the craters I think, but not exclusive to the immediate area. -------------------- |
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Dec 21 2008, 09:27 PM
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Member Group: Members Posts: 710 Joined: 28-September 04 Member No.: 99 |
They look like ordinary dry dust avanches.
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Dec 21 2008, 09:28 PM
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 Member Group: Members Posts: 646 Joined: 23-December 05 From: Forest of Dean Member No.: 617 |
Fascinating, good catch, I'm looking forward to finding out what on Mars it is...
 Edit: OWW - thanks! -------------------- --
Viva software libre! |
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Dec 21 2008, 09:37 PM
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The Poet Dude Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60 |
QUOTE (OWW @ Dec 21 2008, 09:27 PM) They look like ordinary dry dust avanches. Exactly what I thought... wasn't suggesting anything else... just thought it was an interesting area and thought others might think so, too. Still a bit puzzled by the process tho... there are an awful lot of them, and they do look like they're coming from beneath a surface layer of some kind, to my eye at least. But I'm no geologist, obviously. -------------------- |
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Dec 21 2008, 09:58 PM
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Member Group: Members Posts: 710 Joined: 28-September 04 Member No.: 99 |
Me neither.
But I don't see any layers. To me, it looks like they all begin at the top of the 'plateaus'. |
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Dec 21 2008, 10:15 PM
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The Poet Dude Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60 |
Hmmm, you may be right. I'm just very impressed with the area in general.
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Dec 21 2008, 10:39 PM
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Member Group: Members Posts: 710 Joined: 28-September 04 Member No.: 99 |
Easily impressed huh?
Dust, dust and... more dust.To me this terrain looks much more diverse, interesting and....beautiful: http://hirise.lpl.arizona.edu/PSP_009537_2045 Follow that riverbed at 50% zoom and be amazed. And one weird crater: http://hirise.lpl.arizona.edu/PSP_009320_2150
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Dec 22 2008, 08:36 AM
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The Poet Dude Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60 |
QUOTE (OWW @ Dec 21 2008, 10:39 PM) Easily impressed huh? Dust, dust and... more dust.I'm impressed by the thought of all that dust sliding down those slopes, yeah, cos I can imagine being there and seeing, what, dozens of avalanches of dark dust and stones hissing and slithering down the sides of the ridges or plateaus or whatever they are all around me, triggered by - what? Gentle rumblings in the rocks beneath the mighty volcanos that lie to the east? A tremor running through ground after a faraway impact? Sometimes it's what you can't see that makes a martian landscape magical. Love your weirdy crater tho - present for you OWW's Crater -------------------- |
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Dec 22 2008, 11:44 AM
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Member Group: Members Posts: 710 Joined: 28-September 04 Member No.: 99 |
QUOTE (Stu @ Dec 22 2008, 09:36 AM) Sometimes it's what you can't see that makes a martian landscape magical. Then you're gonna Love this one:  http://hirise.lpl.arizona.edu/PSP_004390_1035 Here's another strange crater.... I THINK it was a crater once. http://hirise.lpl.arizona.edu/PSP_010206_1975
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Dec 22 2008, 03:22 PM
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Newbie Group: Members Posts: 15 Joined: 28-November 08 From: Germany Member No.: 4498 |
QUOTE (OWW @ Dec 21 2008, 10:58 PM) Me neither. But I don't see any layers. To me, it looks like they all begin at the top of the 'plateaus'. There are some coarse layers (red lines in the attached image) in the underlying material (Medusae Fossae Formation according to the Geologic Map of the Western Equatorial Region) and some hints of fine-scale layering (see arrows). But these layers are apparently not the sources for the dust. It could be created by surficial weathering of the layered rocks, consistent with the observed sources near the top of slopes.
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Dec 24 2008, 03:03 AM
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Member Group: Members Posts: 599 Joined: 26-August 05 Member No.: 476 |
QUOTE (OWW @ Dec 21 2008, 02:39 PM) And one weird crater: The Face that was Erased. Hoaxland will have a field day. |
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Jan 5 2009, 02:27 PM
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The Poet Dude Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60 |
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Jan 5 2009, 05:04 PM
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 Senior Member Group: Members Posts: 2173 Joined: 28-December 04 From: Florida, USA Member No.: 132 |
QUOTE (Stu @ Jan 5 2009, 09:27 AM) Couple of new  shots here...Dancing with the stars!
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Jan 5 2009, 05:16 PM
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#39
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Member Group: Members Posts: 713 Joined: 30-March 05 Member No.: 223 |
full inline quote removed - mod
Wow: the perfect shot (and the perfect title, centworth II
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Jan 25 2009, 05:12 PM
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 Member Group: Members Posts: 428 Joined: 21-August 06 From: Northern Virginia Member No.: 1062 |
QUOTE (akuo @ Dec 11 2008, 03:20 PM) AFAIR the noise problem was present only in some of the CCDs in Hirise's CCD array. Also the problem was remedied somewhat by warming(?) the CCDs. I think the atmospheric conditions on Mars play a bigger role. That could be seen in some of the images taken during the major dust storm around rovers' regions. The noise in HiRISE images was almost completely eliminated by warming up the CCDs prior to use, the only exception was that IR 10-1 is still a bit noisy, which was the worst of the CCDs. I think they might have even gotten rid of that one too, but it's been a while since I've checked... |
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Apr 23 2009, 07:19 PM
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The Poet Dude Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60 |
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Apr 25 2009, 08:04 AM
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The Poet Dude Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60 |
... and another "volcanic treat" from HiRISE...
http://cumbriansky.wordpress.com/2009/04/2...-volcanic-treat Love that camera!
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May 7 2009, 11:47 AM
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 Senior Member Group: Members Posts: 3516 Joined: 4-November 05 From: North Wales Member No.: 542 |
Stu, I hope you don't mind me posting this link here (since you haven't yet). I found it fascinating. Your impact sites seem to be arranged in a nice 'landing ellipse'! Several questions come to mind. Is the group statistically significant in terms of spatial and temporal density such that a common origin is a serious possibility? Is the 'landing ellipse' consistent with an atmospheric break-up, or is it too big? Folks here can shed light I'm sure.
http://cumbriansky.wordpress.com/2009/05/0...or-a-mars-base/ |
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May 7 2009, 12:05 PM
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 Merciless Robot Group: Admin Posts: 8784 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
Shooting from the hip here, Stu's impact cluster (great find & great article, BTW, dude!
) covers a very large amount of surface area, so I wouldn't expect them to originate from the atmospheric breakup of a single object. Mars' atmosphere is super-thin anyhow, and nowhere is it thinner than in the Tharsis Bulge area.However, one interesting possibility is that this is what's left of the impact of five or more discrete objects that were once one, but were disrupted while still in space into a loose association separated by tens of km or more. Perhaps a small comet nucleus that had been fragmented after perihelion passage then had the misfortune to encounter Mars on the outbound leg? </wild speculation mode> -------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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May 7 2009, 02:08 PM
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#45
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The Poet Dude Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60 |
Thanks guys, glad you found the post interesting. It's probably just a coincidence that those "fresh craters" are all in the same area (roughly), but hey, you never know. I just thought it was an interesting find. Man, I love HiRISE!
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Aug 12 2009, 04:02 PM
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The Poet Dude Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60 |
Very very very cool pic of Victoria Crater released today... oblique view...
http://hirise.lpl.arizona.edu/ESP_013954_1780 Oppy's tracks stand out really clearly on it, too...
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Aug 12 2009, 06:49 PM
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Solar System Cartographer Group: Members Posts: 10163 Joined: 5-April 05 From: Canada Member No.: 227 |
Nice! And here's the intrepid rover itself.
Phil
-------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PD: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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Aug 14 2009, 06:55 AM
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 Senior Member Group: Admin Posts: 3108 Joined: 21-December 05 From: Canberra, Australia Member No.: 615 |
A comparison between the two HiRise images of Victoria Crater.
I've taken the original view and have oriented and distorted it to a similar perspective as the latest version.
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Sep 2 2009, 11:45 PM
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#49
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The Poet Dude Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60 |
Colourised crops from image of gullies in Gale Crater, released today...
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Sep 3 2009, 12:08 AM
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Senior Member Group: Admin Posts: 4763 Joined: 15-March 05 From: Glendale, AZ Member No.: 197 |
The absence of any impact features at any scale here is just amazing.
-------------------- If Occam had heard my theory, things would be very different now.
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Sep 3 2009, 01:52 AM
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Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
Wow...well spotted, Stu.
The quantity of space imagery being released these days that I don't have time to look through is both marvelous and depressing  --Emily -------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
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Sep 3 2009, 02:09 AM
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#52
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Merciless Robot Group: Admin Posts: 8784 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
Remarkable; thanks, Stu!!!
Correct me if I'm wrong, but is that an island in the middle of the channel? Hmmm exp hmmmm.... -------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Sep 3 2009, 11:45 AM
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#53
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Founder Group: Chairman Posts: 14432 Joined: 8-February 04 Member No.: 1 |
Gale still gets my uneducated MSL vote. It's just more spectacular than the others.
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Sep 3 2009, 03:11 PM
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#54
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 Senior Member Group: Moderator Posts: 3431 Joined: 11-August 04 From: USA Member No.: 98 |
QUOTE (nprev @ Sep 2 2009, 07:09 PM) Correct me if I'm wrong, but is that an island in the middle of the channel? Hmmm exp hmmmm.... I could explain the lack of impact features to myself, since this is a small area presumably on a crater wall. But an island seems really interesting. QUOTE (djellison @ Sep 3 2009, 04:45 AM) Gale still gets my uneducated MSL vote. It's just more spectacular than the others. Is this actually Gale, or is it Hale? I saw a gullies in Hale image posted, didn't see Gale yet. |
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Sep 3 2009, 03:36 PM
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#55
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Founder Group: Chairman Posts: 14432 Joined: 8-February 04 Member No.: 1 |
Stu said those a few posts ago were Gale.
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Sep 3 2009, 04:10 PM
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#56
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Senior Member Group: Admin Posts: 4763 Joined: 15-March 05 From: Glendale, AZ Member No.: 197 |
QUOTE (djellison @ Sep 3 2009, 03:45 AM) Gale still gets my uneducated MSL vote. It's just more spectacular than the others. I agree. I'm particularly concerned about Ebrswalde which I fear looks enticing on a macro scale but like Gusev it could become a disappointment (the serendipitous Columbia Hills notwithstanding), possibly hard sandstone maybe even overlaid with some kind of cap-rock obstruction. I like Gale but I also think the likely breathtaking scenery at Holden would be something to keep Stu's inkwell stirred. -------------------- If Occam had heard my theory, things would be very different now.
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Sep 19 2009, 11:09 AM
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#57
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The Poet Dude Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60 |
"Baby" gully on a new HiRISE image..?
http://cumbriansky.wordpress.com/2009/09/1...geous-gullies-2 Just wondering... all input appreciated
-------------------- |
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Sep 19 2009, 12:48 PM
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#58
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 Senior Member Group: Members Posts: 1431 Joined: 26-July 08 Member No.: 4270 |
QUOTE (Stu @ Sep 19 2009, 06:09 AM) "Baby" gully on a new HiRISE image..? I'm certainly no geologist, but I agree with your interpretation of that. Definitely would be nice to get a second image of it later. -------------------- -- Hungry4info (Sirius_Alpha)
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Sep 19 2009, 05:22 PM
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#59
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 Senior Member Group: Members Posts: 3419 Joined: 9-February 04 From: Minneapolis, MN, USA Member No.: 15 |
If it's a "baby" gully, it's been a baby for quite a while. The sand ripples evident in the image seem to have conformed to the dip into the linear depression. If this feature were a new gully that is just beginning to form, you wouldn't expect that there would have been time for such conformal ripples to have formed along the topography.
-the other Doug -------------------- “The trouble ain't that there is too many fools, but that the lightning ain't distributed right.” -Mark Twain
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Sep 19 2009, 11:04 PM
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#60
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The Poet Dude Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60 |
Ah, good thinking Doug, thanks. All input appreciated; it was just something that caught my eye.
-------------------- |
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Sep 19 2009, 11:51 PM
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#61
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Senior Member Group: Admin Posts: 4763 Joined: 15-March 05 From: Glendale, AZ Member No.: 197 |
I would add however Stu that the age of dunes on this steep slope doesn't necessarily correspond to the age of dunes on the plains of Meridiani. So don't abandon your idea yet. For all we know these dunes migrate down that slope on a much more frequent basis. And if the composition is different from what we've seen previously then the mechanical properties of the particles comprising them will be different too. Show me this same photo two years hence and then we can come to some conclusions.
-------------------- If Occam had heard my theory, things would be very different now.
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Sep 24 2009, 04:49 PM
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#62
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 Senior Member Group: Members Posts: 2920 Joined: 14-February 06 From: Very close to the Pyrénées Mountains (France) Member No.: 682 |
A teleconference scheduled shortly (today): http://www.spaceref.com/news/viewpr.html?pid=29221
-------------------- |
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Sep 24 2009, 07:00 PM
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#63
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Member Group: Members Posts: 362 Joined: 13-April 06 From: Malta Member No.: 741 |
teleconference was about water on the moon! Solar wind trapped in lunar soil:hydrogen ions combining with oxygen in the soil to form hydroxyl and water molecules...higher concentration at the higher latitudes towards the poles...diurnal variations with higher concentrations in the morning and dusk!
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Sep 24 2009, 07:25 PM
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#64
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Founder Group: Chairman Posts: 14432 Joined: 8-February 04 Member No.: 1 |
That was the lunar press conference.
Right NOW - there is a teleconference about MRO - http://www.nasa.gov/news/media/newsaudio/index.html http://www.nasa.gov/mission_pages/MRO/news/mro20090924.html They have spotted ice in fresh craters. Not 1% ice in Moon soil. 99% ice in mars soil Would you like some ice with your lunar regolith? How about some martian regolith with your ice. |
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Sep 24 2009, 08:26 PM
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#65
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Senior Member Group: Members Posts: 1018 Joined: 29-November 05 From: Seattle, WA, USA Member No.: 590 |
As with Dr. Johnson's dancing dog, the wonder is not that there's great ice on the moon -- the wonder is that it's there at all.
However, I'll admit Martian ice in fresh craters is pretty cool too. --Greg |
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Sep 30 2009, 11:08 PM
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#66
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The Poet Dude Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60 |
-------------------- |
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Sep 30 2009, 11:45 PM
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#67
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Merciless Robot Group: Admin Posts: 8784 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
THAT is an incredible image, Stu; thank you!!!
-------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Oct 1 2009, 03:00 AM
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#68
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Member Group: Members Posts: 540 Joined: 17-November 05 From: Oklahoma Member No.: 557 |
I think I saw one of those carved into a cliff at Chaco NHP.
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Oct 1 2009, 05:13 AM
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#69
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Member Group: Members Posts: 166 Joined: 20-September 05 From: North Texas Member No.: 503 |
QUOTE (Holder of the Two Leashes @ Oct 1 2009, 04:00 AM) I think I saw one of those carved into a cliff at Chaco NHP. Chaco is one of my favorite parks. I was there once during a total lunar eclipse. It was magical. David |
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Oct 1 2009, 06:55 AM
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#70
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Member Group: Members Posts: 890 Joined: 18-November 08 Member No.: 4489 |
Nice photo .It almost looks like we have some "crop circle Artists " up there
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Oct 1 2009, 11:55 AM
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#71
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The Poet Dude Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60 |
The latest batch of releases also features a rather good image of some of the "martian spiders" - sorry, "radial channels"
... couple of colourised crops here...http://twitpic.com/jtjdy/full http://twitpic.com/jtjf8/full -------------------- |
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Oct 9 2009, 05:39 AM
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#72
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The Poet Dude Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60 |
-------------------- |
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Oct 10 2009, 11:19 PM
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#73
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Member Group: Members Posts: 713 Joined: 30-March 05 Member No.: 223 |
QUOTE (Stu @ Oct 9 2009, 07:39 AM) Just a gorgeous, gorgeous view... Wow: great find Stu ! ... one of the most phantastic, surrealistic martian dune formations yet
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Oct 11 2009, 03:05 PM
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#74
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Member Group: Members Posts: 877 Joined: 7-March 05 From: Switzerland Member No.: 186 |
Subtiler, but DDs can do beautiful artwork too. It's fascinating to see how the DDs spun around. Cropped and sharpened image: 2.7MB full res. http://www.greuti.ch/mro/ESP_014426_2070.jpg 0.65MB http://www.greuti.ch/mro/ESP_014426_2070s.jpg -------------------- |
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Oct 11 2009, 03:34 PM
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#75
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Senior Member Group: Members Posts: 1583 Joined: 14-October 05 From: Vermont Member No.: 530 |
I love the combination of slope streaks and dustdevil tracks! It's a smoking gun of sorts.
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Oct 11 2009, 04:05 PM
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#76
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Junior Member Group: Members Posts: 79 Joined: 11-September 09 Member No.: 4937 |
QUOTE (Stu @ Sep 30 2009, 04:08 PM) Any geological types want to hazard a guess what this is? Crater with multiple rims, maybe? (I'm not good at whether a feature is an innie or an outie.) |
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Oct 11 2009, 06:15 PM
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#77
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Senior Member Group: Members Posts: 2173 Joined: 28-December 04 From: Florida, USA Member No.: 132 |
QUOTE (stevesliva @ Oct 11 2009, 10:34 AM) I love the combination of slope streaks and dustdevil tracks! It's a smoking gun of sorts. The smoking gun of coincidence!
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Oct 11 2009, 06:19 PM
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#78
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 Senior Member Group: Moderator Posts: 3233 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
QUOTE (sgendreau @ Oct 11 2009, 09:05 AM) Any geological types want to hazard a guess what this is? Crater with multiple rims, maybe? (I'm not good at whether a feature is an innie or an outie.) hmm, looks like craters that's been eroded down to their "cores". The boulders could be megabrecia. alternatively, could be eroded, heavily jointed basalt... In which case you are looking at the tops of plutonic dikes. Either way, lots of erosion. -------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Oct 11 2009, 09:28 PM
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#79
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Senior Member Group: Members Posts: 1583 Joined: 14-October 05 From: Vermont Member No.: 530 |
QUOTE (centsworth_II @ Oct 11 2009, 02:15 PM) The smoking gun of coincidence! Not so much. I meant the DD tracks are second very visual indication that a lot of dust moves around in the atmosphere, and dust avalanches can occur when things get past the angle of repose. |
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Oct 15 2009, 08:27 PM
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#80
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Senior Member Group: Members Posts: 2920 Joined: 14-February 06 From: Very close to the Pyrénées Mountains (France) Member No.: 682 |
What about this one?
-------------------- |
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Oct 15 2009, 08:38 PM
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#81
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Senior Member Group: Admin Posts: 4763 Joined: 15-March 05 From: Glendale, AZ Member No.: 197 |
That is amazing. It looks like a blanket with an artistic pattern.
-------------------- If Occam had heard my theory, things would be very different now.
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Oct 15 2009, 09:23 PM
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#82
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Solar System Cartographer Group: Members Posts: 10163 Joined: 5-April 05 From: Canada Member No.: 227 |
This is where we need the guy who says 'Zis is not nuts, zis is super-nuts!'
Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PD: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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Oct 15 2009, 10:34 PM
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#83
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Senior Member Group: Members Posts: 1018 Joined: 29-November 05 From: Seattle, WA, USA Member No.: 590 |
My gosh! At first I thought it was a joke picture of someone's tattoo. Where/what is it?
--Greg |
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Oct 15 2009, 10:38 PM
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#84
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Solar System Cartographer Group: Members Posts: 10163 Joined: 5-April 05 From: Canada Member No.: 227 |
Not a bad idea... I think I will get that tattooed on me.
Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PD: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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Oct 16 2009, 12:31 AM
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#85
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Member Group: Members Posts: 105 Joined: 27-August 05 Member No.: 479 |
are the dunes in valleys?
are the surrounding terrain hills? and mars has a thin atmosphere do the wind cyclones die as they leave the valley and terminate at the tops of the hills? of course the counter argument is on earth the valleys would be cold at there floors this must not be the mechanism on mars for energy for a cyclone or tornado. tornadoes on mars must be driven differently then on earth |
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Oct 16 2009, 12:42 AM
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#86
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Senior Member Group: Admin Posts: 3108 Joined: 21-December 05 From: Canberra, Australia Member No.: 615 |
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Oct 16 2009, 12:57 AM
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#87
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Merciless Robot Group: Admin Posts: 8784 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
This one just gets more fascinating every time I look at it; definitely one of HiRISE's Top 10 most beautiful & intriguing images!
-------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Oct 16 2009, 11:38 PM
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#88
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The Poet Dude Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60 |
(Looking at LROC image...)
Call that a bouncing boulder? THIS is a bouncing boulder..! http://twitpic.com/lsry0 http://twitpic.com/lss3l (from HiRISE image ESP_01439_2045) -------------------- |
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Oct 17 2009, 02:16 AM
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#89
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Merciless Robot Group: Admin Posts: 8784 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
...holy [clinking] [clink!!!!] Can't believe what I'm looking at here, Stu, what a find!
-------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Oct 17 2009, 03:59 AM
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#90
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Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
QUOTE (Stu @ Oct 16 2009, 04:38 PM) (from HiRISE image ESP_01439_2045) Stu, that's not resolving; can you check your source? I think there should be six digits in the first cluster of numbers. -------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
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Oct 17 2009, 04:42 AM
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#91
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Senior Member Group: Admin Posts: 4763 Joined: 15-March 05 From: Glendale, AZ Member No.: 197 |
QUOTE (elakdawalla @ Oct 16 2009, 08:59 PM) Stu, that's not resolving; can you check your source? I think there should be six digits in the first cluster of numbers. Emily try ESP_014394_2045 . -------------------- If Occam had heard my theory, things would be very different now.
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Oct 17 2009, 05:18 AM
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#92
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Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
Thanks Dan!
-------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
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Oct 17 2009, 05:39 AM
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#93
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The Poet Dude Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60 |
QUOTE (nprev @ Oct 17 2009, 03:16 AM) ...holy [clinking] [clink!!!!] Can't believe what I'm looking at here, Stu, what a find!It's not a "find"; the image is already labelled "bouncing boulder" on the HiRISE site. I just coloured it in a bit :-) -------------------- |
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Oct 17 2009, 05:54 AM
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#94
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Merciless Robot Group: Admin Posts: 8784 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
Aah, you still deserve the props, big guy. It's an important image for understanding the behavior of these things; thanks for bringing it to life!
-------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Oct 17 2009, 06:04 AM
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#95
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 Member Group: Members Posts: 160 Joined: 4-July 05 From: Huntington Beach, CA, USA Member No.: 429 |
How could a dust avalanche flow around the boulder so neatly?
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Oct 17 2009, 06:37 AM
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#96
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The Poet Dude Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60 |
-------------------- |
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Oct 17 2009, 06:47 AM
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#97
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Merciless Robot Group: Admin Posts: 8784 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
HA!!!
 Christmas in October! What a stunning sight; thanks, Stu!
-------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Oct 17 2009, 01:12 PM
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#98
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Senior Member Group: Members Posts: 1583 Joined: 14-October 05 From: Vermont Member No.: 530 |
Has this been mentioned here before? I'm not sure how old it is!
http://hirise.lpl.arizona.edu/earthmoon.php 
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Oct 17 2009, 02:08 PM
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#99
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Senior Member Group: Moderator Posts: 4279 Joined: 19-April 05 From: .br at .es Member No.: 253 |
It's stated on that very same page: "... acquired at 5:20 a.m. MST on 3 October 2007"
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Oct 18 2009, 03:46 PM
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#100
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Senior Member Group: Members Posts: 1583 Joined: 14-October 05 From: Vermont Member No.: 530 |
QUOTE (Tesheiner @ Oct 17 2009, 10:08 AM) It's stated on that very same page: "... acquired at 5:20 a.m. MST on 3 October 2007" Clearly I should have started a new topic for it, then.
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