Researchers uncover how spiral galaxy arms form

Spiral galaxies are beautiful astronomical realities that have long been the cause of speculation, with no definitive conclusion having been made over what causes them. Researchers from the Harvard-Smithsonian Center for Astrophysics and the University of Wisconsin-Madison have helped solve this conundrum, stating that they’ve proved the spiral arms are persistent, long-lived, and self-perpetuating. The

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Source: http://feeds.slashgear.com/~r/slashgear/~3/JGsqGIHtk4k/

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