Observations made with the MUSE spectrograph, with the collaboration of Instituto de Astrofísica e Ciências do Espaço (IA), allowed for direct detection of the invisible glow of Lyman-alpha emission, from dim clouds of hydrogen in the early Universe.
A Universe Aglow
![Galáxias no Campo Ultra profundo do Hubble (HUDF).](https://divulgacao.iastro.pt/wp-content/uploads/2018/10/2018out02_1_web-752x423.jpg)
Galáxias no Campo Ultra profundo do Hubble (HUDF). Crédito: ESO/ Lutz Wisotzki et al.