Tag Archive for 'Lyman-alpha nebula' | Sci.News

An enormous halo of hydrogen gas found in HETDEX data and superimposed over its location as seen in deep imaging from the NASA/ESA/CSA James Webb Space Telescope; present 11.3 billion years ago, this system glows from the combined light of many galaxies within it, with the brightest region represented in red. Image credit: Erin Mentuch Cooper, HETDEX / NASA / ESA / CSA / STScI.

Astronomers Find Vast Reservoirs of Hydrogen around Early Galaxies

Apr 6, 2026 by News Staff

Astronomers with the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) have detected enormous hydrogen halos, called Lyman-alpha nebulae, around more...