Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. The Mars Global Surveyor spacecraft currently orbiting Mars is finding out. Photographs released last week showed clouds forming above Tharsis , a huge bulge on Mars about 4000 kilometers across and 7 kilometers high containing several large volcanoes . These clouds temporarily disappeared as a large dust storm emerged from the South , the first developing dust storm to be tracked by an orbiting spacecraft. Mars Global Surveyor continues to aerobrake during on its ongoing mission to survey the planet Mars.
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