Astronomers Detect a Vast Hidden Web of Galaxies in the Early Universe

Astronomers have uncovered a hidden cosmic web of galaxies and gas by mapping hydrogen light from the early universe. Astronomers working with the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) have produced the most detailed three-dimensional map yet of light emitted by energized hydrogen in the early universe. The map traces light from a period between [...]