British theoretical physicist Peter Higgs (left) and Belgian theoretical physicist Francois Englert were awarded the Nobel Prize in physics on Tuesday. Fabrice Coffrini/AFP/Getty Images hide caption

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Fabrice Coffrini/AFP/Getty Images

Remnants of Tycho's Supernova, seen in an X-ray/infrared composite image. The supernova was observed by Tycho Brahe and other skywatchers in 1572.

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