New Horizons measures universe's light, revealing galaxies' dominance

NASA's New Horizons spacecraft has provided the most precise measurements of the universe's light, revealing that the majority of visible light originates from galaxies. Positioned over 5.4 billion miles from Earth, New Horizons measured the cosmic optical background, confirming that no significant unknown light sources exist. This research, published on August 28, 2024, enhances our understanding of deep space's darkness and the light generated over 12.6 billion years.