This movie models how a galaxy acquires most of its gas — the raw material for making stars. Red is hot gas, blue shows the cold streams of gas that flow like a river toward the galaxy’s center, and green shows gas that has been stripped out of satellite galaxies and enriched in metal content by supernova explosions.
Found in "Baby Milky Way Modeled" online at: sciencenews.org/view/generic/id/45004/title/Baby_Milky_Way_modeled
Credit: B. Moore, Oscar Agertz and Romain Teyssier/University of Zurich
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