Illuminating the Void: Astronomers Observe Cosmic Web Filament Between Galaxies For The First Time

An image of quasar UM 287 (at center), taken by the Keck I telescope on the Keck Observatory in Hawaii. The cyan-colored glowing nebula seen around the quasar imaged for the first time, is beleived to be part of the cosmic web of filaments that interconnects all galaxies throughout the Universe. Image credit: S. [...]