
NASA / JPL-Caltech / ASU
Three Martian whirlwinds, known as dust devils, whirl in this picture captured by NASA's Mars Reconnaissance Orbiter on Feb. 11.
It's eerie enough to see one whirlwind swirling across the Martian surface, but three? Get out your 3-D glasses and spot the three dust devils rising from Amazonis Planitia, as seen by the high-resolution camera aboard NASA's Mars Reconnaissance Orbiter.
These mini-twisters are analogous to the dust devils that are whipped up on sunny afternoons on Earth, due to the rise of hot air through a low-pressure pocket of cooler air above it. In February, the Mars orbiter spotted a couple of prominent examples of the phenomenon that rose as high as 12 miles into the Red Planet's thin atmosphere. These three dust devils aren't nearly as big, but seeing them simultaneously in one 3-D picture gives you an idea just how active the wind patterns on Mars can get.
"The active dust devils seem to float above the surface," says Arizona State University's Alfred McEwen, principal investigator for the camera, known as the High Resolution Imaging Science Experiment or HiRISE. "There are also some bright lines present ... those are the tracks of dust devils that passed through this region in the prior two weeks."
For more from Mars, check out the HiRISE website — and as long as you have your 3-D glasses out, take a look at HiRISE's 3-D image gallery. What? You don't have your 3-D glasses yet? This NASA webpage lists some online vendors. While you're at it, think about picking up some sun-viewing spectacles for the May 20 annular solar eclipse. On Friday, I'll be giving away a combo pack of 3-D glasses and eclipse glasses as the prize in our weekly "Where in the Cosmos" photo contest; watch for that on the Cosmic Log Facebook page.
More about Mars:
- NASA re-creates dust devil in 3-D
- Video: Watch a Martian twister spin
- Twisty dust devil captured on Mars
- Watch a dust devil spin in the Martian arctic
- Slideshow: Greatest hits from the Red Planet
Alan Boyle is msnbc.com's science editor. Connect with the Cosmic Log community by "liking" the log's Facebook page, following @b0yle on Twitter or adding Cosmic Log's Google+ page to your circle. You can also check out "The Case for Pluto," my book about the controversial dwarf planet and the search for other worlds.


Your making me feel like a novice astronomer Alan ....
This is cool stuff ....
Great links again ....
The detail in the photo is amazing ....
We've come far from the older photos ....
The link with the ground level , time lapse dirt devil is really good , (small) , but good ....
Thanks so much Alan Boyle , for your immense diverse free entertainment ....
Now we know for sure there is life on Mars. Where there are trailer parks there is life!
You left out a step. Where there are twisters, there are trailer parks. Where there are trailer parks, there are primitive life forms.
jee-Mars, Great Britain, who's next?
What did they look like before NASA did the magic trick with them? You'd think you'd see a dust cloud or something - I'm just saying. It just doesn't look like the surface topography is disturbed at all. so what makes them think we can believe they haven't just used computer generation techniques to convince us we need to go there again to study the weather? I'm for saving the money and spending it on something we can really use - like deficit reduction.
Or maybe education for people to realize that experts just might know what they are talking about....
The Twisted Sisters.
great ride isn't it!
Who knew Tazmanian Devils were from Mars. Or did Marvin capture them and take them there?
No, Alan. I do NOT have my 3D glasses and I cannot make them magically appear (yet). So now I am cross eyed for the rest of the day. I'm also confused - this article mentions to check out the Cosmic Log Facebook page. So when I get there, the Facebook page says to visit cosmiclog.com, so when I get there it says to check out the Cosmic Log Facebook page, so when I there it says to visit cosmiclog.com, so when I get there it says to check out the Cosmic Log Facebook page... ...help, I'm stuck on teh internets!
Wow, a hall of mirrors! The Cosmic Log Facebook page (http://www.facebook.com/cosmiclog) is where the weekly "Where in the Cosmos" contest takes place, and there are updates there that go beyond the blog (many contributed by Cosmic Log correspondents). The contest takes place on Friday, around midday. I hope it's worth hitting the "like" button!