Researchers Take Peek Inside a Comet

Comet Tempel 1 strikes the Deep Impact probe.

hide captionComet Tempel 1 strikes the Deep Impact probe. A trailing craft photographed the collision.

NASA

Early results from NASA's July Deep Impact mission were announced this week, with some surprises for comet specialists.

Guest:

Lucy McFadden, co-investigator , Deep Impact Mission; associate research scientist, Department of Astronomy at the University of Maryland in College Park

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