This artist's conceptual image provided by NASA shows the Upper Atmosphere Research Satellite, or UARS.
September 23, 2011 NASA changes its estimated return time for the Upper Atmosphere Research Satellite and says North America could get some satellite debris after all.
September 22, 2011 NASA says the falling Upper Atmosphere Research Satellite will plunge back to Earth Friday afternoon, Eastern time. Most of it will burn up, but some debris could reach ground. Scientists predict it won't reach either of the poles or North America.
September 19, 2011 A decommissioned weather satellite the size of a bus will reenter the Earth's atmosphere late this week. Most of it will burn up but some fragments may crash into the ground; NASA doesn't know where.
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