Roman Space Telescope launch
The Nancy Grace Roman Space Telescope launched on 30 August 2026 and headed for L2. It sees as sharply as Hubble over a field 100 times wider, and will study dark energy and take a census of exoplanets.
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The story
The Nancy Grace Roman Space Telescope lifted off on a Falcon Heavy rocket from pad 39A at NASA's Kennedy Space Center at 11:26 UTC on 30 August 2026. It is headed for L2, a point about 1.5 million km from Earth where the pull of the Sun and Earth balance so that a telescope can circle the Sun along with Earth. Its main mirror is 2.4 m across, the same as Hubble's, so it sees just as sharply. The orbit replay shows the journey from Earth to a looping orbit around L2.
What sets Roman apart is its wide view. Each picture covers about 100 times more sky than Hubble's cameras, an area roughly 1.3 times that of the full Moon, captured by a camera of about 300 megapixels. Covering the same patch with Hubble would take dozens to hundreds of separate pictures stitched together. That is why Roman is sometimes described as Hubble's eye fitted with a wide-angle lens.
The mission has two main goals. The first is dark energy. The universe is expanding faster and faster, and the unknown cause is called dark energy. Roman will measure the positions and shapes of hundreds of millions of galaxies to track it down. The second is a census of planets around other stars. By photographing the direction of our galaxy's centre again and again, Roman will catch microlensing events, when the gravity of a nearer star briefly brightens the light of a star behind it. It is expected to find thousands of planets this way.
After launch, the telescope unfolded and switched on its parts one step at a time. About 1 hour 23 minutes after liftoff its solar panels and lower sunshade opened. The high-gain antenna, which sends data to Earth, was deployed on 31 August, and the cover over the telescope's opening swung open on 1 September. On 15 September the main camera, the Wide Field Instrument (WFI), was confirmed to be working. On 22 September the coronagraph, a device that blocks a star's light, made its first observation, aimed at a faint star in the Large Magellanic Cloud. It is there to test technology that dims starlight to about one hundred-millionth, so that large planets like Jupiter beside a star could be photographed directly.
Mission goals
Hubble and the James Webb Space Telescope look deeply into small patches of sky. Roman surveys large areas at the same sharpness. Big questions about the universe, such as what dark energy is and how dark matter is spread out, are answered not by a few deep pictures but by counting and measuring hundreds of millions of galaxies. Statistics like that can only be gathered by photographing wide areas of sky quickly.
The microlensing survey finds planets that other methods easily miss. The methods used most so far work best for planets close to their stars. Microlensing can count planets that orbit far out, at distances like those of Mars to Neptune, and even planets drifting alone with no star at all. This makes it possible, for the first time, to measure statistically whether planetary systems like ours are common or rare.
The rule of releasing data right away matters too. Roman's data are made public without a period reserved for a particular team. Scientists everywhere can see the same data on the same day, so more people can take part in discoveries, and sooner. A telescope that takes as many pictures as Roman produces far more data than any single team could examine, so opening it to everyone is itself a way to speed up discovery.
Mission chronology and background
Roman's main mirror was originally built for a US spy satellite. It was one of two mirrors that the National Reconnaissance Office handed over to NASA in 2012. Having a Hubble-class mirror already available helped the Wide Field Infrared Survey Telescope, or WFIRST, take shape quickly. In 2020 it was renamed after Nancy Grace Roman.
Nancy Grace Roman (1925–2018) joined NASA in 1959 and became its first chief of astronomy, setting up its space astronomy programme. In the 1960s and 1970s she helped persuade Congress and scientists to fund the Hubble Space Telescope, which is why she is called the mother of Hubble. By the time Hubble launched in 1990, she had already retired.
Near the end of development, Roman went through vibration, vacuum and temperature tests. NASA held May 2027 as the official launch deadline while aiming to launch earlier, and the telescope in fact flew in August 2026, about eight months ahead of that deadline. Together with ESA's Euclid, launched in 2023, and the ground-based Vera C. Rubin Observatory, Roman is counted as one of three pillars of wide-sky surveys of the universe.
Other milestones of this mission
- Roman's first big surveys(planned)
Where to see it — sky and simulator
Roman is going 1.5 million km from Earth, so it cannot be seen with the naked eye or with amateur telescopes. NASA broadcast the launch live, and the video can be watched again in its public archive. The telescope takes about three months to reach L2 and checks its instruments one by one along the way. The main camera and the coronagraph were already confirmed working in September, and the first science images are expected in early 2027.
First images and survey data are released through NASA and the Roman archive at the Space Telescope Science Institute. The rule is that anyone can download the data soon after it is taken. The orbit replay draws the trip from Earth at launch to the looping orbit around L2. The James Webb Space Telescope and ESA's Euclid are already working in the same neighbourhood.
See this for yourself — replay the moment in the orbit view
FAQ
How does it differ from Hubble?
It is just as sharp, but each picture covers about 100 times more sky. It was built to survey large areas quickly in infrared light.
What does it look for?
It will track down the nature of dark energy by measuring hundreds of millions of galaxies, and search for thousands of exoplanets using gravitational microlensing.
Where does it go?
To a looping orbit around the Sun–Earth L2 point, about 1.5 million km from Earth, the same region where the James Webb Space Telescope works.
When did it launch?
On 30 August 2026 at 11:26 UTC, on a Falcon Heavy. Its main camera and coronagraph were confirmed working in September, it takes about three months to reach L2, and the first science images are expected in early 2027.
Related
Times and figures are approximate — verify with official sources when planning travel. Simulation uses J2000 mean elements.