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September 21, 2005

NASA's JSC Braces For Rita

Now A Category Five Storm Headed For Texas Coast

As Hurricane Rita, the season's fifth major tropical storm, grew stronger and continued pushing west across the Gulf of Mexico Wednesday, NASA was doing what it could to make the Johnson Space Center ready for rough weather.

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Mars Orbiter's Long Life Helps Track Changes on Red Planet

Planetary Evolution From High Orbit

New gullies that did not exist three years ago have appeared on a Martian sand dune.That's just one of the surprising discoveries that have resulted from the extended life of NASA's Mars Global Surveyor, which this month began its ninth year in orbit around Mars. Boulders tumbling down a Martian slope left tracks that weren't there two years ago. New impact craters formed since the 1970s suggest changes to age-estimating models. And for three Mars summers in a row, deposits of frozen carbon dioxide near Mars' south pole have shrunk from the previous year's size, suggesting a climate change in progress.

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