Neutron star “glitch” hints at superfluid beneath its crust

The Vela pulsar, as imaged by the Chandra X-ray telescope. (credit: NASA/CXC/University of Toronto/M. Durant, et al.)

Neutron stars are the most dense form of matter in our Universe (black holes cram more stuff into a smaller space, and it's not clear if that stuff is still "matter"). A neutron star is produced by the collapse of a stellar core, which crams a bit more mass than our Sun into a sphere about 20 kilometers across.

At this density, matter does strange things. Models based on...

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