Asteroid's Path Could Put Earth in Its Sights

Astronomers are debating what to do about Earth's close encounter with an asteroid in 2029 and again in 2036 -- passages that might be too close for comfort.

Apophis, a 1,059-foot-wide asteroid, has excited astronomers since it was spotted last year. After observing it for a while, scientists concluded that it has only a 1-in-8,000 chance of ever smacking into Earth. But even that slim chance has them talking and NASA pondering how to keep track of it -- just in case.

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