# Measuring redshifts of tens of millions of galaxies

![Measuring redshifts of tens of millions of galaxies](https://assets.science.nasa.gov/dynamicimage/assets/science/missions/rst/science/LSS_Roman_Version1_Final.png?w=1600&fit=clip)

- Released: May 21, 2026
- Category: infographics
- Credit: NASA
- NASA source: https://science.nasa.gov/mission/roman-space-telescope/scientific-visualizations/
- Page: https://roman.mixinvisuals.com/image/p97098ed6d7bf/measuring-redshifts-of-tens-of-millions-of-galaxies/

The spectroscopic component of the High Latitude Wide Area Survey measures redshifts of tens of millions of galaxies via grism spectroscopy using the WFI over at least a 1700 deg 2 region that overlaps the region.