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Chandra's find of lonely halo raises questions about dark matter

10/27/2004 12:00AM

Chandra's find of lonely halo raises questions about dark matter

Dark matter continues to confound astronomers as NASA's Chandra X-ray Observatory demonstrated with the detection of an extensive envelope of dark matter around an isolated elliptical galaxy. This discovery conflicts with optical data suggesting a lack of dark matter around similar galaxies, and raises questions about how galaxies acquire and keep such dark matter halos...


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