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View Resource NASA Gives Go-ahead To Build 'Deep Impact' Spacecraft

NASA's Deep Impact mission will attempt to impact a comet nucleus in order to answer basic questions about the nature of comets. Deep Impact's preliminary design phase was completed and approved last week. NASA will now begin building the mission's two spacecraft, a flyby spacecraft and a 350-kilogram (771-pound) impactor spacecraft, for a launch in January 2004. This news brief on Deep Impact...

https://www.jpl.nasa.gov/releases/2001/deepimpact.html