thecosmos

The Cosmos

5 Months ago

Hungry galaxies grow fat on the flesh of their neighbors: Modelling shows big galaxies get bigger by merging with smaller ones

Galaxies grow large by eating their smaller neighbors, new research reveals. Exactly how massive galaxies attain their size is poorly understood, not least because they swell over billions of years. But now a combination of observation and modelling has provided a vital clue.

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