Portal:Astronomy/Picture/24
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![](http://upload.wikimedia.org/wikipedia/commons/thumb/8/8c/Moving_heart_of_the_Crab_Nebula.jpg/360px-Moving_heart_of_the_Crab_Nebula.jpg)
A neutron star is the collapsed core of a massive supergiant star, which had a total mass of between 10 and 25 solar masses, possibly more if the star was especially metal-rich. Image of the central neutron star at the heart of the Crab Nebula.