How do galaxies grow?

Courtesy EurekAlert! - Chemistry, Physics and Materials Sciences  Mon, 08/25/2008 - 22:00

(ESO) Astronomers have caught multiple massive galaxies in the act of merging about 4 billion years ago. This discovery, made possible by combining the power of the best ground- and space-based telescopes, uniquely supports the favored theory of how galaxies form.

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