A Comparison of Roman & Webb Space Telescopes: Far & Wide | NASA Goddard
The James Webb Space Telescope, actively observing the universe from a million miles away, and the Nancy Grace Roman Space Telescope, set to launch in 2026, are NASA's two latest flagship astrophysics observatories. Although both are studying myriad cosmic objects to answer fundamental questions about our universe, they have very distinct designs and capabilities. The universe is such a vast and complex place that it takes many telescopes with unique capabilities to thoroughly study it. This video series compares Roman and Webb.
Webb’s giant mirror, ultracold instruments and infrared vision help it observe the farthest observable reaches of the cosmos. Using its narrow field of view, it can measure distant galaxies and planets outside our solar system with unprecedented detail.
Roman has a large field of view and will capture giant, 300-megapixel images, enabling it to survey the sky 1,000 times faster than the Hubble Space Telescope can while maintaining resolution similar to Hubble’s. Roman will also observe regions repeatedly over time, allowing astronomers to see changes and detect transient events like exploding stars and the movement of planets near the center of our galaxy.
More details: https://science.nasa.gov/roman-and-webb
Learn more about Roman and the discoveries it will enable: https://www.stsci.edu/roman
https://science.nasa.gov/people/nancy-roman/
Video Credit: NASA's Goddard Space Flight Center
Duration: 4 minutes
Release Date: Jan. 20, 2026
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