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Astronomy

The Formation and Evolution of Galaxy Clusters Through Mergers

Quick fact

The Bullet Cluster, a famous merging pair of galaxy clusters, provides direct evidence for dark matter because the dark matter halos pass through each other while the hot gas lags behind due to friction.

Why this is interesting

You've seen pictures of galaxy clusters, but did you know that the most massive ones are still growing today by swallowing other clusters? How does such a colossal cosmic collision unfold?

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The Formation and Evolution of Galaxy Clusters Through Mergers

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