NASA and SpaceX mission managers certified the Nancy Grace Roman Space Telescope ready for final launch preparations after a Flight Readiness Review held Friday at Kennedy Space Center in Florida, clearing the way for a liftoff targeted for no earlier than 7:26 a.m. EDT on Sunday, Aug. 30.
The observatory will ride a SpaceX Falcon Heavy rocket from Launch Complex 39A, the pad NASA once used to send Apollo crews toward the moon. Teams are now moving the telescope, already sealed inside the rocket's payload fairing, into SpaceX's hangar at the pad for final integration ahead of rollout.
The August target puts Roman roughly nine months ahead of the schedule NASA had set earlier in the telescope's development, an unusual outcome for a flagship space science mission, which more typically slip later than planned rather than arrive early.
A wide-angle successor to Hubble
Named for Nancy Grace Roman, NASA's first chief astronomer, the telescope carries a Wide Field Instrument that matches the image sharpness of Hubble's cameras while capturing roughly 100 times more sky in a single exposure. That wide view is built for survey astronomy: mapping how dark energy has shaped the universe's expansion over billions of years, tallying dark matter through the way it bends light from distant galaxies, and hunting exoplanets through microlensing, a technique that watches for the light of background stars flickering as unseen planets pass in front of them. Scientists expect the method to turn up thousands of new worlds, including planets not bound to any star.
A second instrument, the Coronagraph, is a technology demonstration that will attempt to block out starlight to directly image planets orbiting nearby stars, a capability mission scientists say could shape the design of future telescopes built to search for habitable worlds.
After launch, Roman will spend about a month traveling to the second Sun-Earth Lagrange point, roughly a million miles from Earth, where it will operate alongside the James Webb Space Telescope in an orbit shielded from the sun's glare. Its five-year primary science mission is expected to begin a few months later, once instruments are checked out and calibrated.
If the Aug. 30 date holds, Roman would become the second flagship-class NASA observatory to launch this decade, after Webb in 2021, and the first designed from the outset around wide-field survey science rather than the deep, narrow views that made Hubble and Webb famous. Mission planners say Roman's early surveys should begin returning publicly available data within the mission's first year, giving outside astronomers a large new dataset to mine well before the five-year primary mission concludes.
