Monster galaxies lose their appetite with age

[unable to retrieve full-text content]Our universe is filled with gobs of galaxies, bound together by gravity into larger families called clusters. Lying at the heart of most clusters is a monster galaxy thought to grow in size by merging with neighboring galaxies, a process astronomers call galactic cannibalism. New research from NASA's Spitzer Space Telescope and Wide-field Infrared Survey Explorer (WISE) is showing that, contrary to previous theories, these gargantuan galaxies appear to slow their growth over time, feeding less and less off neighboring galaxies.

Source: http://feeds.sciencedaily.com/~r/sciencedaily/top_news/top_science/~3/8UCm2dF0cSU/130801195743.htm

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