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Nasa
Tempel 1 comet photographed by NASAs Deep Impact spacecraft in 2005.
NASA
The last time NASA visited the Tempel 1 comet, it was with fireworks, on July 4, 2005. On that day, the Deep Impact spacecraft slammed an 820-pound projectile into Tempel 1, excavating a plume of ice and dust.
From The New York Times
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