Dust Devil Tracks
Many areas on Mars, including the Hellas 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 orbiting spacecraft. They have even blown the dust off of 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 five years and are still going. The pattern of the tracks have been shown to change every few months. A study that combined data from the High Resolution Stereo Camera (HRSC) and the Mars Orbiter Camera (MOC) found that some large dust devils on Mars have a diameter of 700 meters and last at least 26 minutes.
Read more about this topic: Hellas Quadrangle
Famous quotes containing the words dust, devil and/or tracks:
“The dust shall sing like a bird
As the grains blow, as your death grows, through our heart.”
—Dylan Thomas (1914–1953)
“We are oft to blame in this,
‘Tis too much proved, that with devotion’s visage
And pious action we do sugar o’er
The devil himself.”
—William Shakespeare (1564–1616)
“I long ago lost a hound, a bay horse, and a turtle-dove, and am still on their trail. Many are the travellers I have spoken concerning them, describing their tracks and what calls they answered to. I have met one or two who had heard the hound, and the tramp of the horse, and even seen the dove disappear behind a cloud, and they seemed as anxious to recover them as if they had lost them themselves.”
—Henry David Thoreau (1817–1862)