News of the WeekAstronomy

Satellite's X-ray Vision Clinches the Case for Dark Matter

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Science  25 Aug 2006:
Vol. 313, Issue 5790, pp. 1033
DOI: 10.1126/science.313.5790.1033

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Summary

A fantastically energetic collision between clusters of galaxies has demolished a challenge to the law of gravity, providing the clearest evidence yet for the existence of intergalactic dark matter. (Read more.)