Brightest Galactic Flash Ever Detected Hits Earth

By Robert Roy Britt
Senior Science Writer |
posted: 18 February, 2005

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.

But you could not have seen it, unless you can top the X-ray vision of Superman: In gamma rays, the event equaled the brightness of the full Moon's reflected visible light.

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