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February 19, 2005

Cosmic blast among brightest recorded

A huge explosion halfway across the galaxy packed so much power it briefly altered Earth's upper atmosphere in December, astronomers said Friday.

No known eruption beyond our solar system has ever appeared as bright upon arrival.

The event equaled the brightness of the full Moon's reflected visible light, NASA says. It was not visible to the naked eye.

The blast originated about 50,000 light-years away and was detected December 27. A light-year is the distance light travels in a year, about 6 trillion miles (10 trillion kilometers).

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Posted by thinkingmachine at February 19, 2005 07:57 AM

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