AST-554intermediate

Galaxy Groups & Clusters: Observation, Measurement & Evidence

Galaxies are strongly clustered rather than randomly distributed. Clusters are laboratories for dark matter, plasma physics, galaxy environmental evolution, cosmology, and large-scale structure growth.

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intermediate48 minFact checked

Galaxy Groups & Clusters: Observation, Measurement & Evidence

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AST-553Galaxy Groups & Clusters: Physical Mechanisms→

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AST-555Galaxy Groups & Clusters: Advanced Connections→

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Clusters grow through gravitational collapse and hierarchical merging of smaller halos.

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Galaxies are strongly clustered rather than randomly distributed.

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Galaxy redshifts and velocities reveal bound populations, X-ray emission maps hot gas, gravitational lensing maps total mass, and the motions of galaxies require far more mass than visible stars alone provide.