# Baryon Acoustic Oscillations

![Baryon Acoustic Oscillations](https://assets.science.nasa.gov/dynamicimage/assets/science/cds/general/images/2023/10/bao-moviestill.png?w=1600&fit=clip)

- Released: April 9, 2026
- Category: illustrations
- Credit: NASA
- NASA source: https://science.nasa.gov/mission/roman-space-telescope/science/
- Page: https://roman.mixinvisuals.com/image/p5940df42e666/baryon-acoustic-oscillations/

Roman will detect vestiges of sound waves, called baryon acoustic oscillations (BAOs), that once rippled through the primordial cosmic sea.