Astronomers detect echoes 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.

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<p><a href="http://www.physorg.com/news9263.html">Astronomers detect echoes from ancient supernovae</a></p> <p>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.</p>