NASA's Nancy Grace Roman Space Telescope launched aboard a SpaceX Falcon Heavy rocket from Launch Complex 39A at Kennedy Space Center at 7:26 a.m. EDT on August 26, 2026. The observatory is traveling to the Earth‑Sun L2 point to study dark energy, exoplanet atmospheres, and the large‑scale structure of the universe.

The mission extends previous astrophysics efforts by directly imaging exoplanets using a coronagraph that blocks starlight, allowing measurement of planetary spectra. Its data volume is projected to exceed that of the James Webb Space Telescope by nearly a factor of 30, with up to 10 terabytes stored onboard during periods when communication is not possible.

The Falcon Heavy performed a standard launch sequence, separating its side boosters after two and a half minutes, after which the boosters returned to land on the coast. The spacecraft then deployed its solar arrays and sunshade, established contact with ground stations, and began a three‑month commissioning period before full operations.

Observatory manager Jason Hylan said the system will cool detectors to operating temperature before activation, describing the process as configuring a custom computer and operating system. He noted that once online the telescope will downlink about 1.4 terabytes of data per day and retain up to 10 terabytes in onboard storage.

Deputy project scientist Dr. Bertrand Mennesson explained that the coronagraph will enable direct observation of exoplanets, providing spectra to determine atmospheric composition. He added that future large telescopes are expected to include coronagraphs as a standard feature.

Astrophysicist Dr. Adam Riess, who shared a 2011 Nobel Prize for discovering accelerating cosmic expansion, said Roman will increase the number of observed supernovae dramatically, improving constraints on the expansion history. He noted that earlier studies required many photographs to locate a single supernova, whereas Roman will capture dozens per image.

The telescope’s wide‑angle capability will enable extensive sky surveys, mapping supernovae and other transient events across the galaxy. Hylan expects the mission to reveal unexpected findings beyond current predictions.