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Martian Dust Devils On Film - Kinda Crazy
Posted In: Mars Coverage  4/22/05

Dust Devils on Mars

What started out as a couple of dust devils first spied by the Spirit rover a couple of weeks ago has now turned into a swarm of dust devils wheeling across the plains of Gusev Crater almost every day.


Image to right: Dust Devils on Mars Spirit took this image of several dust devils in Gusev Crater using its navigation cameras on sol 433 (March 21, 2005). Image credit: NASA/JPL

So far, the dust devils are about the same size as those that whip up desert dust and sand in the southwestern United States, though orbital images in past years have detected dust devils in many places on Mars that are up to several kilometers (a few miles) tall, says Shane Thompson, Research Technician with the Planetary Geology Group at Arizona State University.

Accompanied by Wind

NASA's Spirit rover spotted the first dust devil of the Mars Exploration Rover mission on martian sol, or day, 421 (March 10, 2005). The dust devil was observed the day after martian winds cleared the rover's deck and increased the amount of power the rover harvested from sunlight shining on its solar panels.


Image to right: More Dust Devils Spirit took these images of dust devils in Gusev Crater with its navigation cameras on sol 433 (March 21, 2005). Image credit: NASA/JPL

Sign of Spring?

Rover science team member Ron Greeley, Director of the Planetary Geology Group, has been tracking and studying dust devil characteristics in detail on both Mars and Earth for the past couple of years. Scientists believe the small cyclones are seasonal, perhaps linked to wind storms that occur in the martian spring.

"We're trying to determine whether dust devils play a small or large role in changing the surface of Mars in the short-term," says Thompson.


Image to right: Biggest Dust Devil So Far Spirit took this image of the biggest dust devil encountered on sol 433 (March 21, 2005). Image credit: NASA/JPL






Check out the LARGE Animated Gif that shows a Dust Devil in action!!!


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