Galaxy collisions dominate the local universe.

M2 Presswire | December 6, 2005 | Copyright

M2 PRESSWIRE-6 December 2005-YALE UNIVERSITY: Galaxy collisions dominate the local universe(C)1994-2005 M2 COMMUNICATIONS LTD

RDATE:06122005

New Haven, Conn. -- More than half of the largest galaxies in the nearby universe have collided and merged with another galaxy in the past two billion years, according to a Yale astronomer in a study using hundreds of images from two of the deepest sky surveys ever conducted.

The idea of large galaxies being assembled primarily by mergers rather than evolving by themselves in isolation has grown to dominate ...

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