DETLEV VAN RAVENSWAAY / SCIENCE PHOTO LIBRARY DETLEV VAN RAVENSWAAY / SCIENCE PHOTO LIBRARY
Comet after Deep Impact strike. Image 3 of 3. Ill- ustration of comet Tempel 1 after the Deep Impact mission impactor strike. A cloud of bright debris is seen around the nucleus. NASA's Deep Impact mission will fire a 500 kilogram impactor at the nucleus at 10 kilometres per second. Sensors on a space probe will study the resulting explosion and debris. The comet's material will be unchanged since the beginning of the solar system 5 billion years ago. This mission will provide information about the solar system's history. It is due for launch in January 2004. For a sequence showing the impact, see images R250 139-141.
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