Reionization Signatures in Quasar Absorption Spectra

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Exploring the early Universe, this book delves into the Cosmic Microwave Background and the mysterious Dark Ages, a period marked by a lack of observational data. It discusses how gravitational instabilities led to the formation of the first bound objects and stars at redshifts of 20-30. The narrative highlights the pivotal process of cosmic reionization, transforming the Universe from a neutral state to a structured, ionized one, significantly altering the intergalactic medium and setting the stage for the cosmos we observe today.