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Puppis A

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Puppis A [′pəp·əs ′ā]
(astronomy)
An extended, nonthermal radio source, the remnant of a supernova that exploded about 10,000 years ago, about 1.8 kiloparsecs (3.5 × 1016miles or 5.6 × 1016kilometers) from the earth.


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In the case of the Puppis A supernova remnant, the unusual chemistry and apparent youth of a distinctive pattern of faint filaments near the remnant's center suggest a second supernova may have exploded within the original expanding shell of gas some 3,000 years later.
 
 
 
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