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Engineers from the jet Propulsion Laboratory, in Pasadena, California, have recently obtained one of the most peculiar pictures that the rover Spirit ever sent back from the Red Planet. By combining three photographs taken seconds apart from each other, and snapped in different color filters, they obtained the first picture of a dust devil on Mars that looks like a rainbow. The robot is still stuck in a patch of loose soil known as “Troy,†as experts continue their efforts to devise escape strategies, ScienceDaily informs. The special-effect shot taken recently shows the devil as it moves in front of Spirit's camera, and then disappears out of the frame. The colors that appear in the photo are due to the special filters that were used to take the pictures, all sensitive to different wavelengths of visible light. They were snapped on the 1,919th Martian day of the robot's mission, May 27th, 2009, back on Earth. According to experts, the dust devils appeared on the Red P!
lanet when the same conditions were met as on Earth â€" the Sun heats the surface, and creates a layer of hot air just above it. Being less dense, that air tends to rise, picking up the finer sand particles on the surface and sending them upwards. In the five years since Spirit has been on Mars, it has pictured more than...
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http://news.softpedia.com/news/Spirit-Images-Colorful-039-Devil-039-118453.shtml
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