Roman Space Telescope Opens Aug. 30 Launch Window to Hunt 100,000 Exoplanets
Updated
Updated · The Planetary Society · Sep 1
Roman Space Telescope Opens Aug. 30 Launch Window to Hunt 100,000 Exoplanets
3 articles · Updated · The Planetary Society · Sep 1
Summary
NASA’s Nancy Grace Roman Space Telescope entered a launch window opening Aug. 30, 2026, after the flagship mission was moved up by more than half a year while staying on budget and on schedule.
From the Earth-Sun L2 point 1.5 million kilometers away, Roman will pair a 2.4-meter mirror with a 300-million-pixel wide-field camera and a coronagraph built to directly image exoplanets.
That setup makes Roman about 1,000 times faster than Hubble at sky surveys and delivers more than a 100-fold gain in seeing faint exoplanets compared with Hubble and JWST.
Dark energy is a primary target, with Roman set to probe cosmic expansion through weak lensing, galaxy clustering and Type Ia supernova surveys across huge areas of sky.
Exoplanet science could be equally transformative: Roman is expected to find more than 100,000 planets—up from about 6,000 known today—and test technologies for NASA’s future Habitable Worlds Observatory.