NASA Space Probe Reaches Comet

Deep Impact is struck by comet Tempel 1.

The Deep Impact probe is struck by comet Tempel 1. NASA hide caption

itoggle caption NASA

Fourth of July fireworks started early in California as scientists at NASA's Jet Propulsion Laboratory celebrated the collision of its space probe with a comet 83 million miles away.

The impact occurred at 1:52 a.m. EDT Monday, according to NASA. Scientists hope the experiment will shed light on the formation of planets in the solar system billions of years ago.

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