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Nature 420, 31-33 (7 November 2002) | doi:10.1038/420031a

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Astronomy: Twinkle, twinkle, neutron star

Cole Miller

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Neutron stars, as the name suggests, are mostly made of neutrons. But the cores of these tiny, dense stellar leftovers might conceal new states of matter, including strange matter. The light from these stars holds the key.

Neutron stars, formed during the death throes of massive stars, are among the most exotic objects in the Universe. They are the size of a city but typically contain at least 40% more mass than our Sun.