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An international research team, led by the Italian National Institute for Astrophysics (INAF), used the James Webb Space Telescope (JWST) to observe a dramatic interaction between a quasar and two massive satellite galaxies in the PJ308-21 system. The JWST’s Near-Infrared Spectrograph (NIRSpec) provided unprecedented details, revealing high metallicity and star formation conditions. This discovery offers new insights into early galaxy growth and the role of quasars, showing that both black holes and their host galaxies undergo rapid and tumultuous growth within the first billion years of cosmic history.

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