8. Galaxies in Collision (7:53) We revisit the galaxy cluster simulations of Swarm followed by random views of two-galaxy collisions. The animation begins slowly to allow an appreciation of the grace of gravitational dynamics but the tempo gradually increases to change the impression to a frenetic dance of severe intensity and violence. The animation ends with a fireworks display of rapid fire merging pairs of galaxies fading into the Hubble Space Telescope image of the The Mice one of the well-known nearby famous pairs of interacting galaxies. The final image reminds us that we live in one single instant of an evolving universe. 
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