Haunting images from Mars
Posted: Friday, April 13, 2007 7:59 PM by Alan Boyle
There's fresh imagery this week from NASA's robotic emissaries at Mars, including video of dust devils spinning through the Spirit rover's field of view and pictures of a scary-looking route down to the floor of the crater that the Opportunity rover is investigating. This comes in addition to the latest view of the Face on Mars, provided by the Mars Reconnaissance Orbiter.
All this cool imagery might ease some of the sting felt after last year's loss of Mars Global Surveyor - which resulted from a regrettable chain of events detailed today in a report from a NASA review board.

NASA / JPL |
A mini-tornado known as a dust devil spins over the Martian surface in this image from NASA's Spirit rover. Click on the image to watch a video report.
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The latest and greatest Red Planet view would have to be the dust devil featured in this week's video report from rover mission manager Byron Jones. He said Spirit spends a few minutes every morning looking for such mini-tornadoes - which have been seen plenty of times in the course of the rover's 39-month mission on Mars. This particular whirlwind is interesting because it seems to collapse right in front of the camera, like a ghost being exorcised.
Jones also pointed out Spirit's next target, an outcropping of bedrock nicknamed Madeline English. The rover has to use a parallel-parking technique as well as a driving technique called "crabbing" to sidle up to the rock, in part because of its bum right front wheel. Eventually, Spirit is due to climb right on top of an intriguing rock formation called "Home Plate," which it took an all-too-brief look at last year. Spirit had to leave Home Plate behind so it could find a sunny place where it could ride out the Martian winter.
On the other side of the planet, Opportunity is still snooping around the edges of the half-mile-wide (800-meter-wide) Victoria Crater. Jones said the rover's next task is to take a closer look at the dark flecks spotted within the crater from orbit. The still images included in his video report make downward drop from the rim look positively vertiginous.
The video report and the weekly status reports are the most easily digestible ways to keep track of what's happening to NASA's amazingly long-lived rovers. As the twin missions have settled into the long term, the big-production image releases have become fewer and farther between. In the months ahead, the spotlight may well turn more toward Mars Reconnaissance Orbiter, a mission that is just now hitting its stride, as well as the Mars Phoenix mission that's due for launch in August.
That doesn't mean there's any letup in the raw imagery: You can still find tons of those unprocessed pictures in the galleries maintained by NASA's Jet Propulsion Laboratory and the Exploratorium.
I'm starting to favor Web sites such as the Pancam team's archive (which has up-to-date color imagery) and Michael Lyle's image server (which provides pseudocolor and 3-D pictures). Cosmic Log's Italy correspondent, Gaetano Marano, has his own favorite sources for 3-D Mars imagery. Keep your red-blue glasses at the ready, and leave a comment if you have other favorite sources for rover pictures.

NASA / Univ. of Ariz. |
The high-resolution camera on NASA's Mars Reconnaissance Orbiter sent back this view of the Face of Mars, first noted three decades ago.
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When it comes to Mars Reconnaissance Orbiter, you can check JPL's Web site, or the home page for the imaging spectrometer team, but I think the Web site for the high-resolution camera's science team (a.k.a. HiRISE) is the best place to check for the latest released imagery. That's where I found the latest rendition of the Face on Mars this week.
It's worth noting that ever since the Face was first spotted by Viking back in 1976, every successful Red Planet orbiter has had a little face time with the spooky anomaly: You can see versions from Mars Global Surveyor, from Mars Odyssey, from Mars Express and now Mars Reconnaissance Orbiter.
The dearly departed Global Surveyor was the mission that really ended the Face's appeal for all but its hard-core fans. The probe's camera was capable of much higher resolution than Viking's, and that meant the fuzzy, facelike features looked more and more like natural bumps and ridges.
The latest image, which is available in file sizes up to 303 megabytes, removes still more of the mystery. Nevertheless, HiRISE's views of the eerie Martian terrain, including the Face as well as the Red Planet's rippled dunes and layered deposits, are as haunting as ever.