massive gravity distorts the galaxies' shape and sends them ripping through the cluster at unimaginable speeds.
NASA Image and Video Library - 3 views
Gallery: 55 images for NASA's 55th anniversary | Ars Technica - 0 views
The origin of 'soft' gamma radiation - 0 views
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http://images.spaceref.com/news/2009/ODMediaBriefing28Apr09-1.pdf - 0 views
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