The great Glow
From Halopedia, the Halo wiki
The great Glow was the name given by the Forerunners to a point in time before life existing in the galaxy. The Librarian referred it as reference point when thinking what may have originally originated at Path Kethona.
List of appearances
- Halo: Silentium (Mentioned only)
- Halo: Silentium, String 4
- The Glow: A realm outside conventional space, consisting purely of photons.