NAM 03: Large galaxies stopped growing 7 billion years ago - 0 views
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Galaxies are thought to develop by the gravitational attraction between and merger of smaller 'sub-galaxies', a process that standard cosmological ideas suggest should be ongoing. But new data from a team of scientists from Liverpool John Moores University directly challenges this idea, suggesting that the growth of some of the most massive objects stopped 7 billion years ago when the Universe was half its present age.
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How galaxies form and then evolve is still a major unanswered question in astronomy.
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conventional simulations of the evolution of the Universe predict that BCGs should have at least tripled in size over that time.
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