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XMM-Newton's view of the Bullet Group reveals the aftermath of a colossal merger of galaxies, hot gas and dark matter
via ESA Space Science
http://sci.esa.int/xmm-newton/54116-cosmic-collision-in-the-bullet-group/
XMM-Newton's view of the Bullet Group reveals the aftermath of a colossal merger of galaxies, hot gas and dark matter
via ESA Space Science
http://sci.esa.int/xmm-newton/54116-cosmic-collision-in-the-bullet-group/
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