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Martian Dust Devil With Track And Shadow
Tucson AZ (SPX) Aug 14, 2009 This telescopic view from orbit around Mars catches a Martian dust devil in action in the planet's southern hemisphere. The swirling vortex of dust can be seen near the center of the image. The shadow cast by this column of dust can be seen in the upper left while the dark track left by the passage of the dust devil is evident in the lower right. This is a cutout from an image taken by the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter on June 15, 2009. The scene is at 68.6 degrees south latitude, 11.4 degrees east longitude. Dust devils on Mars form the same way that they do on Earth. The ground heats up during the daytime, warming the air immediately above the surface. This hot layer of air rises and the cooler air above falls, creating vertical convection cells. A horizontal gust of wind causes the convection cells to rotate, resulting in a dust devil. As the dust devil moves across the surface of Mars it can pick up and disturb loose dust, leaving behind a track. Share This Article With Planet Earth
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Titan Twisted In Frigid Imitation Of EarthRio de Janeiro, Brazil (SPX) Aug 13, 2009 Saturn's haze-enshrouded moon Titan turns out to have much in common with Earth in the way that weather and geology shape its terrain, according to two pieces of research to be presented at the XXVII General Assembly of the International Astronomical Union in Rio de Janeiro, Brazil. Wind, rain, volcanoes, tectonics and other Earth-like processes all sculpt features on Titan's complex ... read more |
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