HETDEX Astronomers Unveil the Largest 3D Map of Hydrogen Light in the Early Universe, Revealing a Hidden Sea of Cosmic Structure
A team using the Hobby-Eberly Telescope processed 600 million spectra to build the first large-scale intensity map of Lyman-alpha emissions from 9 to 11 billion years ago, exposing faint galaxies and intergalactic gas invisible to conventional surveys.
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