![how bright is the universes glow study offers best measurement yet](https://utterbuzz.com/wp-content/uploads/2024/09/how-bright-is-the-universes-glow-study-offers-best-measurement-yet-640x379.jpg)
Over billions of years, the universe’s stars and galaxies shined their light into space, leaving behind an imperceptibly faint night light known as the cosmic optical background. NASA’s New Horizons spacecraft has traveled to the edge of Earth’s solar system and captured the most accurate measurement of this glow to date.