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Explore the groundbreaking discoveries made by ESA's Gaia telescope in this 18-minute educational video that reveals hidden galaxies within our own Milky Way. Learn how this revolutionary space observatory, which recently reached the end of its operational life, mapped over a billion stars and uncovered surprising secrets about our galaxy's structure and formation. Discover how Gaia's billion-pixel camera and precise measurements have transformed our understanding of the Milky Way's spiral arms and revealed evidence of ancient galactic mergers that shaped our cosmic home. The video details Gaia's scientific legacy and explains how its comprehensive star catalog has allowed astronomers to identify previously unknown dwarf galaxies embedded within our galaxy's boundaries.
