Deep Impact Collision Provides Comet Clues The resulting debris jet from the crash shot out from the comet's nucleus at 1,800 kilometers an hour. Pointing north-northeast, the jet was not uniform in color, suggesting that dust particles of varying sizes were moving at slightly different speeds.
NASA Hails a Direct Hit on Comet Deep Impact lived up to its name early Monday with a spectacular smash into Comet Tempel 1 that produced a brilliantly glowing plume of debris.
Telescopes Analyze Probe-Comet Collision The collision of a NASA space probe and a potato-shaped comet hurled a bright cloud of debris into space at the speed of a jetliner.