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November/December 2006

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On the Cover: Gas left over from a 340-year-old stellar explosion is seen in this detail from a composite X-ray-infrared-optical image of the supernova remnant Cassiopeia A.

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November/December 2006 

Stirring Up a SupernovaStirring Up a Supernova
The most massive stars -- in the heavens, not Hollywood -- do indeed 'live hard, die young, and leave a beautiful corpse.'

Misfit PulsarsMisfit Pulsars
A newly discovered type of irregular pulsar may outnumber the well-known radio flashers in our galaxy.

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