Saturday, December 31, 2005

Echoes of the past from ancient supernovae



'A team of astronomers has found faint visible “echoes” of three ancient supernovae by detecting centuries-old light reflected by interstellar gas clouds hundreds of light-years removed from the original explosions. Located in a nearby galaxy in the southern skies, the three exploding stars flashed into short-lived brilliance at least two centuries ago, and probably longer. The oldest is likely to have occurred more than 600 years ago.' More

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