NEWS | Takeoff! NASA Launches Nancy Grace Roman Space Telescope

At 7:26 a.m. on August 30th, 2026, NASA launched the Nancy Grace Roman Space Telescope on the SpaceX Falcon Heavy rocket. Ascending from the Kennedy Space Center in Florida, the telescope will observe Earth 930,000 miles away from L2, the second Sun-Earth vantage point, for five years. NASA scientists hope the telescope will collect data about planetary bodies in Earth’s solar system and new exoplanets in the Milky Way, the effects of dark matter on distant celestial objects, and the expansion of the universe by measuring dark energy.

“[Roman’s] going to find thousands of supernovae, tens of thousands of planets, billions of galaxies and tens of billions of stars,” said NASA science mission director Nicky Fox. “It’s going to be able to do things that we’ve never been able to do before.”

NASA’s Most Advanced Telescope

NASA scientists believe the telescope will collect observational data more efficiently than ever. “Roman uses state-of-the-art sensors that build on the legacy of the infrared detectors in NASA’s Hubble and Webb instruments…” said NASA Goddard astrophysicist Greg Mosby. “Roman’s focal plane, however, is much larger to capture a much larger field of view.” Compared to the Hubble Space Telescope, Roman's primary mirror is one-fourth the weight, yet creates a field of view over a hundred times larger! It can also scan the sky without needing much time between observations, surveying the universe a thousand times faster. Each day, Roman will also send back around 1.4 terabytes of data: the highest rate of any NASA mission thus far.

Roman does so through two scientific instruments: The Wide Field Instrument and the Coronagraph. The Wide Field Instrument, which will be deployed after a few weeks, is the spacecraft’s camera. Using a 300-megapixel infrared camera and eighteen detectors, it converts faint infrared light from across the universe into electrical signals, which researchers then decode into crisp, high-resolution images of large stretches of space. On the other hand, the Coronograph assists with planetary photography by minimizing glare from distant stars, thus revealing the planets orbiting around it. Its flexible internal mirrors allow the Wide Field Instrument to rapidly adjust to incoming light, suppressing stars’ diffraction to create clearer images. With this more precise imaging, future missions for detecting signs of life in the atmospheres of Earth-like exoplanets will become increasingly feasible. Even though Roman wasn’t specifically designed to search for life, Fox said it will pave the way for future consideration of NASA’s biggest question: “Are we alone? Is there another Earth 2.0 looking back at me?”

Roman’s Research: Dark Energy, Dark Matter, and Exoplanet Exploration

Many scientists attribute the expansion of the universe to an invisible cosmic pressure known as dark energy. Most of the universe is unobservable, and dark energy composes around 68% of the universe's total content. Roman serves to measure the equation of state of dark energy and its time evolution, determining whether or not it is a constant. By taking photometric measurements of redshift—light’s wavelengths stretching out, growing redder as the universe expands—the telescope can help astrophysicists determine how much of it was due to dark energy.

While dark energy accelerates the universe’s expansion, dark matter keeps galaxies together, composing most of their masses. Even though dark matter is invisible, it affects regular matter gravitationally. Because space-time is curved by the masses within it, light passing by galaxy clusters—or other celestial bodies with high concentrations of dark matter—bends towards or around it, rather than merely passing through. This phenomenon is called gravitational lensing, and Roman will continue to investigate it, sending data about how smaller clusters of dark matter warp distant galaxies. These observations will further inform scientists about the characteristics of dark matter particles, and by doing so, they can narrow down candidates for dark matter particles, creating the potential for detecting them in experiments on Earth.

Roman’s imaging observations will also help scientists search for exoplanets. By detecting microlensing, gravitational lensing in smaller celestial objects, the telescope can help detect exoplanets farther outside our solar system. From our perspective, microlensing events can only be detected when an object such as a star or planet passes between Earth and some background star emitting light. Light then bends around the nearer object as it travels toward Earth, temporarily brightening the background star to astronomers. This indicates that there is some intervening object, even if unclear what it is—because exoplanets are incredibly dim due to their distance, microlensing is among NASA's most effective techniques for detecting faraway objects. With its larger field of view and refined imaging technology, NASA scientists predict that Roman will better be able to pick up these bursts of brighter light, monitoring the light from potentially hundreds of millions of stars.

The Future for Roman

“We’ve never been able to view the universe with eyes like Roman’s before,” said Julie McEnery, Roman’s senior project scientist at NASA Goddard. “There’s no telling what more we’ll know and have seen by this time next year.” From its near-infrared sensitivity to its record-high-resolution imaging and field of view, the telescope will collect large samples from the sky: it’s expected to observe thousands of small bodies in our solar system, millions of galaxies, and billions of Milky Way stars. Such data will address important questions on many topics, including cosmology, stellar populations, galaxy evolution, and astroparticle physics.