Debris from massive satellite may hit earth Friday

September 20, 2011 10:32:47 AM PDT
Scientists are now predicting metal debris from a massive satellite may hit earth as early as Friday morning but, no one knows where yet. It's been in orbit for 20 years.

The Upper Atmosphere Research Satellite is the size of a school bus. But, where the debris will land is the question. Scientists say the satellite orbits the earth every 89 minutes. But, because it's started tumbling now it follows a new path every time around.

Most of the six and a half ton satellite is expected to burn up in the atmosphere. But, scientists say chunks from just a pound to 300 pounds will crash down over a stretch of four to 500 miles - somewhere between the tip of Canada and the very bottom of South America.

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