NASA launches $4.3 billion Nancy Grace Roman Space Telescope toward Lagrange point L2

Launch and orbital trajectory

A SpaceX Falcon Heavy rocket lifted off from Launch Complex 39A at NASA's Kennedy Space Center in Florida on Sunday, 30 August 2026, at 7:25 a.m. EDT (11:25 UTC). Powered by 27 kerosene-fueled engines providing 5 million pounds of thrust, the vehicle carried the 9-metric-ton Nancy Grace Roman Space Telescope toward deep space. The rocket's two reusable side boosters separated and completed powered landings back at Cape Canaveral minutes after liftoff. Mission controllers at the Goddard Space Flight Center in Maryland acquired initial telemetry seven minutes into the flight, followed by spacecraft separation 31 minutes after launch. Ground teams confirmed the deployment of the observatory's solar panels and lower sunshield 1 hour and 23 minutes into the mission. The spacecraft is now on a 100-day journey covering 1.5 million kilometers toward the Sun-Earth Lagrange point L2.

Wide-field optics and data systems

The 4.3-billion-dollar observatory carries a 2.4-meter primary mirror originally transferred to NASA by the National Reconnaissance Office in 2012. Its primary sensor, the Wide Field Instrument, combines 18 detectors to deliver a 300-megapixel infrared capture system. This configuration gives Roman a field of view 100 times larger than that of the Hubble Space Telescope while matching its optical resolution. The observatory scans the sky approximately 1,000 times faster than Hubble, completing in one month sky surveys that previously required a century. To manage this throughput, Roman will transmit 1.4 terabytes of raw observations to Earth each day, utilizing machine learning algorithms for initial data processing. NASA Administrator Jared Isaacman commended the project teams following the launch.

Roman is exactly the kind of success story we want to see across NASA. Delivered ahead of schedule and on budget, this mission reflects more than a decade of dedication from the NASA workforce and our industry partners. Now, Roman will give us a new atlas of the Universe, push the boundaries of discovery, and demonstrate what is possible when America's space program pairs bold ambition with disciplined execution.

Exoplanet detection and cosmological survey

Roman carries an experimental optical coronagraph designed to suppress bright starlight and image faint planetary companions directly. Vanessa Bailey, an instrument specialist at the Jet Propulsion Laboratory, explained the sensitivity requirements for direct imaging.

We will be able to detect exoplanets that are 100 million times less luminous than their star.

The mission plans to catalog roughly 20 billion stars in the Milky Way while investigating dark matter and the dark energy accelerating cosmic expansion. Roman joins a global observational network alongside the European Space Agency's Euclid telescope, launched in 2023, and the Vera C. Rubin Observatory in Chile. Nicky Fox, head of NASA science missions, outlined the scientific scale expected from the observatory.

It will be able to discover thousands of supernovae, tens of thousands of planets, billions of galaxies and tens of billions of stars. Thanks to its huge field of view, it will be able to do things that we were never able to do before.

Naming and project history

The observatory is the first NASA flagship space telescope named after a woman, honoring astronomer Nancy Grace Roman (1925–2018). Roman completed her doctorate at the University of Chicago in 1949 and served as NASA's inaugural chief of astronomy, overseeing the 1968 launch of the Orbiting Astronomical Observatory 2. Her decades of advocacy for space-based observatories earned her recognition as the mother of the Hubble Space Telescope. The Roman project reached the launch pad nine months ahead of its May 2027 agency commitment while remaining within its baseline budget. Operational commissioning will continue over the next three months at Lagrange point L2, with initial calibrated science images scheduled for release in early 2027.