Caption: How Spiral Galaxies Get Their Arms: The image below and video animation shows a simulation of arm formation in spiral galaxies. The simulation was performed by UW-Madison astrophysicist Elena D’Onghia, who led new research in the area along with Harvard-Smithsonian Center for Astrophysics colleagues Mark Vogelsberger and Lars Hernquist.
Image: The visualization was created by Thiago Ize and Chris Johnson of the University of Utah's Scientific Computing and Imaging Institute.
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