Photo: Stars Migrate Through Galaxies, Study Suggests

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A computer simulation shows the development and evolution of the disk of a galaxy such as the Milky Way.

People have generally assumed that once a star forms inside a galactic disk, it stays in a more or less fixed orbit around the center of its galaxy, but the reality might be much more complicated, according to a study released September 2008.




Image courtesy Rok Roškar

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