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By The New York Times
February 14, 2011
![[article image]](https://cacm.acm.org/system/assets/0000/4721/21411.nytimes.comet.Tempel1.large.jpg?1476779417&1297703308 "Comet Tempel 1")
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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