![]() Redshifts between z ~ 11–1100 are currently devoid of any direct observational probes. ![]() However, between the first image of the Universe from the Cosmic Microwave Background (CMB) and the first stars and galaxies becoming visible (some half to one billion years later) to large ground- and space-based observatories, observational probes remain incredibly scarce. The first billion years of the Universe (its ‘infancy’) is one of the least explored and understood eras in the Universe, despite enormous observational progress in recent years with optical/uv, infrared, and sub-mm ground- and space-based instruments.
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