The heavy hitters in space telescopes are about to be joined by a new contender.
NASA’s Nancy Roman Grace Space Telescope arrived at the Kennedy Space Center (KSC), in Florida, on Sunday (June 21), for final tests ahead of launching later this summer. Roman was shipped to KSC from NASA’s Goddard Space Flight Center in Greenbelt, Maryland, riding the agency’s Pegasus barge from Baltimore to the Space Coast.
KSC is Roman’s final stop before launching to space aboard a SpaceX Falcon Heavy rocket where it will join other flagship observatories like Hubble, Webb, Chandra and Spitzer. NASA is currently targeting an Aug. 30 liftoff — eight weeks ahead of its original schedule. Before that date arrives, Roman will undergo tests inside KSC’s Payload Hazardous Servicing Facility (PHSF), where upgrades were recently completed to prepare for the telescope’s arrival.
Roman, inside a specialized, environmentally-controlled protective container used to encapsulate the telescope at the start of its journey from Goddard, was transported to the exterior of the PHSF building following its KSC arrival, where teams began a decontamination and cleaning process to ready the container for opening today (June 22) inside the PHSF airlock, followed by the unboxing and transportation of the roughly 18,000-pound (8,200-kilogram) spacecraft to the high bay clean room for prelaunch preparations.
Roman’s work platform inside the PHSF, which NASA refers to as “the Pantheon” will allow engineers to perform final checkouts on the spacecraft, including tests of the telescope’s six solar panels, insulation, and heat management components. Technicians will also load Roman with about 290 gallons (1,100 liters) of hypergolic hydrazine fuel, which will power the satellite’s thrusters for delivery to its final orbit and small positional adjustments during the ten or more years the propellant is expected to last.
Roman is headed to Sun-Earth Lagrange point two (L2), a station-keeping point about 1 million miles (1.6 million kilometers) beyond Earth on the side opposite the sun. Lagrange points are regions of space similar to where the gravitational influence of two or more bodies is equal, allowing spacecraft to be “parked” and remain in place without needing to fire their thrusters and expend fuel. Once it settles in at L2, Roman’s mission is set to last for at least five years, with the option for NASA to extend the telescope’s use as long as its fuel lasts and instruments perform as needed.
Using its 7.9-foot-wide (2.4 meters) primary mirror, combined with a 300-megapixel camera and coronograph, Roman’s primary mission will be hunting down the elusive mysteries of dark energy and the accelerating expansion of the universe through the discovery of “billions of galaxies, hundreds of thousands of new exoplanets, hundreds of blackholes, and … vast volumes of daily data for astronomers to study,” according to NASA.