A Universe Aglow
ESO's Very Large Telescope has uncovered a faint omnipresent glow surrounding distant galaxies.
By gazing deep into the famous Hubble Ultra Deep Field...
...VLT's MUSE spectrograph saw nearly the entire field of view glowing.
This glow is caused by clouds of hydrogen that surround galaxies in the early Universe.
MUSE's exquisite sensitivity allowed us to observe these dimly shining clouds...
...and showed that the glowing hydrogen illuminates almost the whole night sky.
Transcribed by ESO; Translated by —