May 23, 2007, HiRISE release |
May 23, 2007, HiRISE release |
Guest_AlexBlackwell_* |
May 23 2007, 04:01 PM
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May 23 2007, 04:10 PM
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#2
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Founder Group: Chairman Posts: 14433 Joined: 8-February 04 Member No.: 1 |
Ustrax - finally - you have what you asked for
http://hiroc.lpl.arizona.edu/images/PSP/di...PSP_003647_1745 http://hiroc.lpl.arizona.edu/images/2007/d..._1745_cut_b.jpg THAT...is an abyss. Doug |
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May 23 2007, 04:12 PM
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Senior Member Group: Members Posts: 3516 Joined: 4-November 05 From: North Wales Member No.: 542 |
Well, just look at that great big hole in the ground !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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May 23 2007, 04:20 PM
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#4
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Special Cookie Group: Members Posts: 2168 Joined: 6-April 05 From: Sintra | Portugal Member No.: 228 |
Ustrax - finally - you have what you asked for THAT...is an abyss. If I knew the service was so fast I could have ordered one earlier... EDITED: A view: -------------------- "Ride, boldly ride," The shade replied, "If you seek for Eldorado!"
Edgar Alan Poe |
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May 23 2007, 04:59 PM
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#5
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Senior Member Group: Members Posts: 1281 Joined: 18-December 04 From: San Diego, CA Member No.: 124 |
-------------------- Lyford Rome
"Zis is not nuts, zis is super-nuts!" Mathematician Richard Courant on viewing an Orion test |
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May 23 2007, 05:12 PM
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#6
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Senior Member Group: Moderator Posts: 2785 Joined: 10-November 06 From: Pasadena, CA Member No.: 1345 |
Wow!!!
Is that the entrance or exit? -------------------- Some higher resolution images available at my photostream: http://www.flickr.com/photos/31678681@N07/
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May 23 2007, 06:12 PM
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#7
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Merciless Robot Group: Admin Posts: 8784 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
..okay, THIS made my jaw drop! Why so circular? Almost looks like a meteor punched right through a thin surface crust & into a deep dark chamber (undoubtedly making the patented Wile E. Coyote as he goes off a cliff "bomb dropping" whistle all the way down in the thin Martian air...)
Either that, or we finally found the ejection end of the linear accelerator that launched H.G. Wells' invading cylinders... The imagination runs wild. If these things are really deep, you could have some interestingly high atmospheric pressure down there... -------------------- 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 23 2007, 06:16 PM
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#8
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Founder Group: Chairman Posts: 14433 Joined: 8-February 04 Member No.: 1 |
Well - unless its many many km's - then there are other places which will have higher atmos.press at 'ground' level. But it's still a very very exciting and interesting feature
Doug |
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May 23 2007, 06:21 PM
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#9
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Junior Member Group: Members Posts: 63 Joined: 4-May 05 Member No.: 378 |
Looks to me like one of Kim Stanley Robinson's Mars moholes.
Alternatively, we could extrapolate wildly from Titan and assume that anything that dark and featureless has to be liquidish, sort-of. Or not. -------------------- Popper: A party entertainment, filled with confetti and a small explosive charge.
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May 23 2007, 06:39 PM
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#10
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Director of Galilean Photography Group: Members Posts: 896 Joined: 15-July 04 From: Austin, TX Member No.: 93 |
I wonder what IR will show us, especially at night. I don't think we'll be able to look down the hole directly, unless MRO's orbit is modified, right? Maybe we need to wait for a nice, strong dust storm to kick up the tau, so that more light is sent down the hole from all around. Pretty amazing that it is pitch black!
I'm sure it's possible with to make an estimate of the minimum size and depth of the cavern based on that. Maybe we'll get lucky and something interesting will show up on IR, like the extent of the roof over the cavern. Do either of the radars on Mars have the resolution to check this out? I don't quite understand why the incidence angle != angle of the sun above the horizon; only thing I can think of is that we're looking at a slope. Anyone locate a wider context shot of that location? I couldn't see any lava-tube features, but the whole image might be one. EDIT: Looks like this is Jeanne: http://themis-data.asu.edu/img/browse/V183...&stretch=S2 Took me a bit to convince myself it's the same location. -------------------- 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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May 23 2007, 07:20 PM
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Senior Member Group: Admin Posts: 4763 Joined: 15-March 05 From: Glendale, AZ Member No.: 197 |
Can someone less lazy than I do the calculations on this? If we know the angle of the sun and the angle of this photo it should be easy to calculate a minimum depth for this chasm if we assume that sunlight illuminating the bottom of this hole would be visible in the image. Since nothing is visible, the depth must exceed that minimum.
-------------------- If Occam had heard my theory, things would be very different now.
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May 23 2007, 07:20 PM
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#12
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Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
See this topic for more information and links to context images from Odyssey:
http://www.unmannedspaceflight.com/index.php?showtopic=4036 --Emily -------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
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Guest_AlexBlackwell_* |
May 23 2007, 07:24 PM
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#13
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May 23 2007, 07:32 PM
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#14
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Senior Member Group: Moderator Posts: 3233 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
Given this image's location on Mars, I would presume this is a skylight of an old lava tube. Very interesting though.
-------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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May 23 2007, 07:43 PM
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#15
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Member Group: Members Posts: 688 Joined: 20-April 05 From: Sweden Member No.: 273 |
Yes, but it must be a very large tube since the hole is more than 100 meters across. I can't remember ever seeing a window into a lava tube that big on Earth. I wonder if lava tubes scale with gravity somehow.
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