NASA's Deep Impact awaits launch from Cape Canaveral Air Force Station, Fla. on Jan. 12, 2005.

Deep Impact awaits launch from Cape Canaveral Air Force Station, Fla. on Jan. 12, 2005.

The spacecraft will travel to comet Tempel 1 and release an impactor, creating a crater on the surface of the comet. Scientists believe the exposed materials may give clues to the formation of our solar system.

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