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Published online 4 November 2009 | Nature | doi:10.1038/news.2009.1063
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Supernova mystery solved?
Sooty neutron star could lie at the heart of Cassiopeia A.
Two astrophysicists believe that they have dispelled the mystery surrounding an object at the centre of a distant supernova remnant.
Around 330 years ago, a massive star in the constellation Cassiopeia exploded.
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