Astronomers discover why some galaxies are spiral-shaped.
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Using sophisticated computer simulations, a team of researcher say they one step closer to understanding how we came to be. The study, published earlier this month, provides some surprising answers to long-standing questions about the origin and history of spiral galaxies.
Scientists from the University of Wisconsin-Madison and the Harvard-Smithsonian Center for Astrophysics say for the first time they can show that stellar spiral arms are not transient features, as many have long believed, but rather are “self-perpetuating, persistent and surprisingly long-lived.”