Hubble Solves Merger Mystery From Milky Way’s Early Years

NASA's Hubble Space Telescope has discovered definitive evidence that the young Milky Way consumed a dwarf galaxy called LKH about eleven point eight billion years ago, just two billion years after the Big Bang. The findings come from studying globular star clusters—immense collections of ancient stars that act as cosmic archaeological sites, preserving evidence of long-past mergers. This discovery extends our knowledge of the galaxy's formation history one point eight billion years further back than previously understood.

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