The faint little galaxies that could shed light on the early cosmos

The first galaxies coalesced more than 12 billion years ago. Small and fairly short-lived, they helped to bring light and energy to a vast, dark sea of neutral atoms in a process known as reionization. Now, researchers have identified a clutch of galaxies relatively near Earth that could serve as good proxies for the study of those ancient galaxies¹.

doi: https://doi.org/10.1038/d41586-021-02943-3

Subjects

• Astronomy and astrophysics