Tidal Tales of Minor Mergers: Young Stars Where They Shouldn't Be

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Optical image of the galaxy merger NGC 2782 showing the location of young star clusters which formed in the sweeping tails of debris after the collision. Even though the gas properties of the two tails are different both tails show unexpectedly simil ...
Optical image of the galaxy merger NGC 2782 showing the location of young star clusters which formed in the sweeping tails of debris after the collision. Even though the gas properties of the two tails are different, both tails show unexpectedly similar populations of young star clusters. This material was presented to the American Astronomical Society meeting in Washington, D.C. on January 11, 2006. (Photo: Karen Knierman, UA Steward Observatory, and Patricia Knezek, WIYN/NOAO)

Arizona astronomers have discovered a population of what appear to be young star clusters where they aren't supposed to be. The newborn stars appear to have formed in the debris of the NGC 2782 galaxy collision -- debris that lacks what astronomers believe are some important ingredients needed to form stars.


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