Birth of a primordial star

Birth of a primordial star, as seen through a supercomputer simulation. A spiral pattern forms inside the disk surrounding the star, leading to enhancements in density. One of these density perturbations is large enough to trigger the formation of a secondary protostar. Distances are measured in Astronomical Units (AU), which is the distance between Earth and our Sun. Credit: Clark, Glover, Smith, Greif, Klessen, Bromm (Univ.of Heidelberg, UT Austin); Texas Advanced Computing Center

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