Dust Devil Tracks
Many areas on Mars, including the Arcadia quadrangle, experience the passage of giant dust devils. A thin coating of fine bright dust covers most of the Martian surface. When a dust devil goes by it blows away the coating and exposes the underlying dark surface. Dust devils have been seen from the ground and from orbit. They have even blown dust from the solar panels of the two Rovers on Mars, thereby greatly extending their lives. The twin Rovers were designed to last for 3 months, instead they have lasted more than six years. The first Rover, Spirit, was last heard from in March 2010. Opportunity Rover is still exploring the Red Planet, after more than eight years. The pattern of the tracks have been shown to change every few months. The image below from HiRISE shows some dust devil tracks in the shape of X's. You may need to click on the image for a larger view to see the tracks clearly.
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Tantalus Fossae, as seen by HiRISE. Click on image to see dust devil tracks.
Read more about this topic: Arcadia Quadrangle
Famous quotes containing the words dust, devil and/or tracks:
“Traveling, you realize that differences are lost: each city takes to resembling all cities, places exchange their form, order, distances, a shapeless dust cloud invades the continents.”
—Italo Calvino (1923–1985)
“But then in novels the most indifferent hero comes out right at last. Some god comes out of a theatrical cloud and leaves the poor devil ten thousand-a-year and a title.”
—Anthony Trollope (1815–1882)
“Truth is one, but error proliferates. Man tracks it down and cuts it up into little pieces hoping to turn it into grains of truth. But the ultimate atom will always essentially be an error, a miscalculation.”
—René Daumal (1908–1944)