“This is a great discovery!” says ESO team member Themiya Nanayakkara. “Next time you look at the moonless night sky and see the stars, imagine the unseen glow of hydrogen: the first building block of the universe, illuminating the whole night sky.” An unexpected abundance of Lyman-alpha emission in the Hubble Ultra Deep Field … Continue reading ESO’s Very Large Telescope Team Detects a Glowing Universe –“A Great Discovery!”