Manufacturing Industry
Copper impactor collides with comet, vaporizes contents.(METALS)
Advanced Materials & Processes, September, 2005
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After 173 days in space chasing Comet Tempel 1, NASA's Deep Impact spacecraft released a probe called an impactor, which collided with the comet's nucleus on July 4. Copper makes up half of the impactor's total mass, and was selected for this mission based on several key factors, including its overall strength--necessary to crack open the comet's surface.
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To make the copper probe even stronger, the metal was fortified with 3% beryllium. [ILLUSTRATION OMITTED] Lacking any explosive charge, the mass of the 370 kg (816 lb) impactor, combined with the velocity at which it is ...
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