Tag Archive for 'Enormous Lyman-Alpha Nebula'

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...

This MUSE image shows a huge cloud of gas around the distant quasar 4C 10.29. Image credit: Arrigoni Battaia et al / ESO.

Astronomers Spot Giant Nebula around Distant Quasar

Nov 24, 2017 by News Staff

Astronomers using ESO’s Very Large Telescope in Chile have discovered an enormous cloud of gas around an extremely distant quasar called 4C 10.29. This...