Enormous 3D map of the universe shows brilliant 'sea of light' near the cosmic dawn
Astronomers created an exceptionally detailed 3D map of the early universe by tracking light emitted from hydrogen atoms when excited by nearby stars, revealing a brilliant "sea of light" that filled the ancient cosmos. Using line-intensity mapping with the Hobby-Eberly Telescope in Texas, researchers captured combined light from entire sky regions rather than individual galaxies, detecting previously hidden faint...