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4 total sentences available.
NASA scientists say everything remains on course for what promises to be Monday's spectacular rendez-vous between the Deep Impact space probe and the comet, Tempel 1. The announcement follows the separation of the "impactor" from the fly-by space craft, which will record the massive collision.
Source: tatoeba (12292500)
cascade impactor
Source: wiktionary
Chicxulub impactor
Source: wiktionary
Although Dr. Bottke remains unconvinced that the impactor had a cometary origin, he noted that the asteroid explanation also raised many exciting and unresolved questions.
Source: wiktionary