The power of HiRISE |
The power of HiRISE |
Dec 21 2008, 10:15 PM
Post
#31
|
|
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.
-------------------- |
|
|
Dec 21 2008, 10:39 PM
Post
#32
|
|
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 |
|
|
Dec 22 2008, 08:36 AM
Post
#33
|
|
The Poet Dude Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60 |
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 -------------------- |
|
|
Dec 22 2008, 11:44 AM
Post
#34
|
|
Member Group: Members Posts: 710 Joined: 28-September 04 Member No.: 99 |
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 |
|
|
Dec 22 2008, 03:22 PM
Post
#35
|
|
Newbie Group: Members Posts: 15 Joined: 28-November 08 From: Germany Member No.: 4498 |
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. |
|
|
Dec 24 2008, 03:03 AM
Post
#36
|
|
Member Group: Members Posts: 599 Joined: 26-August 05 Member No.: 476 |
|
|
|
Jan 5 2009, 02:27 PM
Post
#37
|
|
The Poet Dude Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60 |
-------------------- |
|
|
Jan 5 2009, 05:04 PM
Post
#38
|
|
Senior Member Group: Members Posts: 2173 Joined: 28-December 04 From: Florida, USA Member No.: 132 |
|
|
|
Jan 5 2009, 05:16 PM
Post
#39
|
|
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 |
|
|
Jan 25 2009, 05:12 PM
Post
#40
|
|
Member Group: Members Posts: 428 Joined: 21-August 06 From: Northern Virginia Member No.: 1062 |
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... |
|
|
Apr 23 2009, 07:19 PM
Post
#41
|
|
The Poet Dude Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60 |
-------------------- |
|
|
Apr 25 2009, 08:04 AM
Post
#42
|
|
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! -------------------- |
|
|
May 7 2009, 11:47 AM
Post
#43
|
|
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/ |
|
|
May 7 2009, 12:05 PM
Post
#44
|
|
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.
|
|
|
May 7 2009, 02:08 PM
Post
#45
|
|
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!
-------------------- |
|
|
Lo-Fi Version | Time is now: 28th June 2024 - 01:35 PM |
RULES AND GUIDELINES Please read the Forum Rules and Guidelines before posting. IMAGE COPYRIGHT |
OPINIONS AND MODERATION Opinions expressed on UnmannedSpaceflight.com are those of the individual posters and do not necessarily reflect the opinions of UnmannedSpaceflight.com or The Planetary Society. The all-volunteer UnmannedSpaceflight.com moderation team is wholly independent of The Planetary Society. The Planetary Society has no influence over decisions made by the UnmannedSpaceflight.com moderators. |
SUPPORT THE FORUM Unmannedspaceflight.com is funded by the Planetary Society. Please consider supporting our work and many other projects by donating to the Society or becoming a member. |