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Celestial Album
Diagram of a protoplanetary disk around a young star


Angular momentum is transported outward and mass is transported inward and onto the star via disk turbulence. This turbulence is studied using local simulations of a small patch of disk (the 3D box on the lower right; this shows the gas density in the turbulent state). The presence of an external magnetic field similar to the one shown acts to enhance this turbulence in the outer disk regions. Credit: Simon et al. 2013

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