NASA has successfully launched an ambitious new space-based telescope. The Nancy Grace Roman Space Telescope lifted off from Kennedy Space Center in Florida on August 30, 2026, aboard a SpaceX Falcon Heavy rocket. Roman is now making a roughly three-month, one-million-mile journey toward the Sun-Earth Lagrange Point 2, the same region of space used by the James Webb Space Telescope.

Roman is named for Nancy Grace Roman, NASA’s first chief astronomer and an important early advocate for space-based astronomy who became known as the “mother of Hubble.” Roman’s primary mirror is approximately the same size as Hubble’s, but its field of view is at least 100 times larger. NASA estimates Roman will be able to survey portions of the universe as much as 1,000 times faster than Hubble while maintaining comparable sensitivity and infrared resolution.

Once operational, Roman could dramatically expand humanity’s understanding of dark energy, dark matter, galaxies and planets beyond the solar system. That combination could revolutionize the science of astronomy. Instead of examining relatively small sections of space in extraordinary detail, Roman can produce enormous panoramic surveys containing millions or even billions of objects.

During its five-year primary mission, the telescope is expected to observe billions of galaxies, giving astronomers unprecedented amounts of data about how galaxies formed and how the large-scale structure of the universe evolved. The resulting observations could help scientists construct a detailed three-dimensional picture of the cosmos.

One of Roman’s most important objectives involves the mysterious substances and forces that dominate the universe. Dark matter cannot be directly seen but appears to provide much of the gravitational framework around which galaxies developed. Dark energy is the name scientists give to the still poorly understood phenomenon apparently causing the expansion of the universe to accelerate.

By measuring enormous numbers of galaxies, supernovae and gravitational-lensing events, Roman could allow researchers to determine how cosmic expansion has changed over billions of years. The new telescope will also provide data to help test whether existing theories of gravity, including Einstein’s general relativity, adequately explain what astronomers observe.

Roman could be equally important to the search for other worlds. Its surveys are expected to uncover vast numbers of exoplanets using gravitational microlensing, potentially revealing planets that would be difficult to detect through conventional methods. NASA estimates Roman’s surveys could uncover roughly 100,000 new exoplanets.

Its experimental Coronagraph Instrument will also demonstrate technology capable of blocking the overwhelming light from a star so astronomers can observe faint planets and planet-forming disks nearby.

Roman’s greatest contribution may come from discoveries scientists cannot yet predict. Its enormous field of view and unprecedented flow of astronomical data will allow researchers to search simultaneously for supernovae, black holes, distant galaxies, unusual stars and entirely unexpected phenomena. Hubble and Webb showed how a new telescope can change astronomy by seeing farther or more clearly. Roman adds another capability, seeing an enormous portion of the universe at once.