NASA launches Deep Impact spacecraft on comet probe
NASA on Wednesday launched the "Deep Impact" spacecraft on a mission to smash a hole in a comet from which scientists hope to find frozen remains from the early years of the formation of the solar system. The spacecraft will release a 372-kg projectile one day before the projectile will run into Comet Tempel 1 at the speed of 37,000 kmph on July 4, about 132 million km away from the Earth.
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