Astronomers create the largest 3D map of the early universe revealing hidden galaxies

Astronomers have created the largest and most detailed 3D map yet of a glowing signal from the early universe, revealing hidden galaxies and gas from 9-11 billion years ago. By analyzing faint Lyman-alpha light emitted by energized hydrogen, scientists used an advanced technique called line intensity mapping to capture not just the brightest galaxies but also the vast cosmic structures surrounding them.