Our Galaxy Is a Cannibal

The video explores the mystery of galaxy formation, initially thought to occur through primordial collapse. However, the presence of stars of varying ages in galaxies suggests a hierarchical merger model, where galaxies grow by merging with others. Galactic cannibalism is common, with larger galaxies consuming smaller ones, as seen with the Milky Way. The future of galaxies involves potential mergers, but universal expansion may limit these events. The video concludes with credits and a call to support SciShow Space.

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