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• 21:32, 25 January 2026 DanteWashere talk contribs created page Reionization (Created page with "'''Reionization''' refers to a phase in the early universe during which neutral hydrogen became ionized due to radiation from the first luminous sources. It marks a transition in the thermal and ionization state of cosmic matter. Reionization is discussed in cosmology, astrophysics, and studies of early structure formation. == Status == Reionization is investigated through observations of the cosmic microwave background, high-redshift galaxies, and absorption features...")