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London UK (SPX) May 14, 2008 article withdrawn pending embargo ending at 18:00 BST. Community Email This Article Comment On This Article Share This Article With Planet Earth
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![]() ![]() Astronomers have made the best ever determination of the power of a supernova explosion that was visible from Earth long ago. By observing the remnant of a supernova and a light echo from the initial outburst, they have established the validity of a powerful new method for studying supernovas. |
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