NASA and SpaceX are set for the launch of NASA’s subsequent nice house observatory — the Nancy Grace Roman House Telescope. Launching atop a Falcon Heavy from the Kennedy House Middle in Florida, Roman will journey to the Solar-Earth Lagrange Level 2, the place it should use two devices — the Extensive Discipline Instrument and the Coronagraph Instrument — to seek for exoplanets, darkish vitality, and different astrophysical phenomena.
Falcon Heavy and Roman are scheduled to elevate off at 7:26 AM EDT (11:26 UTC) from Launch Complicated 39A (LC-39A) on the Kennedy House Middle in Cape Canaveral, Florida. Following launch, Roman will spend round a month cruising out to the Solar-Earth Lagrange Level 2 (L2), a time that telescope staff members will use to fee the telescope and put together it for breakthrough scientific observations.
Following launch, Falcon Heavy’s two aspect boosters will return to land at two Cape Canaveral House Pressure Station touchdown zones. The middle core is not going to be recovered to make sure Falcon Heavy has sufficient efficiency to launch the telescope.
Historical past of the Nancy Grace Roman House Telescope
The idea of Roman first emerged in 2010, when the U.S. Nationwide Analysis Council Decadal Survey really useful that the Extensive-Discipline Infrared Survey Telescope (WFIRST) be NASA’s high precedence for the following decade of astronomy. Initially sharing similarities with the once-proposed Joint Darkish Vitality Mission from NASA and the Division of Vitality, WFIRST’s design was studied from 2011-2012 below the title “WFIRST Design Reference Mission 1.” This primary WFIRST design featured a 1.3 m three-mirror anastigmat structure with a single-prism spectrometer instrument.
Nonetheless, in 2012, the Nationwide Reconnaissance Workplace (NRO) provided NASA two unused Harris Company telescopes for the WFIRST mission. The Harris telescopes featured a mirror the identical measurement because the joint NASA and European House Company (ESA) Hubble House Telescope, however a wider area of view than Hubble’s because of the telescopes’ lowered focal size, the purpose at which mild mirrored by the mirror focuses. Though designing a totally new telescope probably would’ve been cheaper, NASA opting to make use of NRO telescopes for a science mission added political significance to the WFIRST mission.
After reviewing a number of WFIRST telescope design ideas, NASA in the end chosen one of many two Harris NRO telescopes for the WFIRST mission, with plans to implement a coronagraph instrument for the direct imaging of exoplanets.
NASA and WFIRST mission groups then spent a number of years planning and debating mission timelines, orbits, and targets. All through 2015, groups studied sending the telescope to both a geosynchronous orbit or L2, contemplating observing constraints, thermal stability, and the potential for future servicing missions at each places. By February 2016, groups had determined to make the most of a halo orbit at L2 for the mission.
Roman below building at NASA’s Goddard House Flight Middle in Maryland. (Credit score: NASA/Jolearra Tshiteya)
In November 2018, NASA awarded the contract for the development and operation of the telescope to the company’s Goddard House Flight Middle in Greenbelt, Maryland. The NASA heart has intensive expertise working telescopes and deep-space missions, with the Hubble House Telescope and the James Webb House Telescope managed by groups at Goddard.
Members of the WFIRST staff first printed mission particulars and capabilities in a February 2019 white paper, and NASA permitted the telescope for implementation and building in March 2020. In Might 2020, NASA Administrator Jim Bridenstine introduced the renaming of WFIRST to the Nancy Grace Roman House Telescope after NASA’s first feminine government and Chief of Astronomy.
The telescope handed its important design evaluate (CDR) in 2021, clearing the best way for building to start. Whereas the COVID-19 pandemic led to a number of delays and disruptions within the telescope’s building and launch timeline, staff members set a 2027 launch date, with all flight {hardware} fabrication to be accomplished by the tip of 2024.
NASA awarded the launch contract for the telescope to SpaceX’s Falcon Heavy in July 2022 for an estimated $255 million. Building of the telescope’s bus, which homes nearly all of the telescope’s devices and electronics, was accomplished in September 2024, and Roman handed its spin check that October. By December 2024, Roman’s mirror and devices had been built-in onto its bus. NASA introduced that building of the telescope was accomplished in November 2025.
Roman seen totally deployed at Goddard following remaining integration in November 2025. (Credit score: NASA/Jolearra Tshiteya)
After finishing remaining testing at Goddard, the telescope was positioned in a specialised container and shipped from Maryland to the Kennedy House Middle in June 2026. As soon as faraway from its container, Roman was moved to the Payload Hazardous Servicing Facility, the place it was cleaned, inspected, fueled, and built-in onto launch {hardware}. The telescope was encapsulated inside its payload fairing on Aug. 24 after which moved to SpaceX’s Horizontal Integration Facility at LC-39A for integration onto Falcon Heavy.
Roman’s devices and science targets
As talked about, Roman, at its core, is a Harris NRO telescope retrofitted to conduct astrophysical observations. With a launch mass of 10,500 kg, the telescope incorporates a 2.4 m-diameter three-mirror anastigmat with a focal ratio of seven.9, able to observing wavelengths from 0.48 to 2.30 micrometers. This wavelength vary will permit the telescope to watch all the seen mild and near-infrared areas of the electromagnetic spectrum. This makes Roman a kind of hybrid between Hubble and Webb: it shares Hubble’s mirror measurement and visible-light wavelength vary, in addition to Webb’s near-infrared wavelength vary, although with totally different devices.
The primary of Roman’s two devices is the Extensive Discipline Instrument (WFI). This 288-megapixel digital camera shall be able to observing Roman’s full 0.48 to 2.30 micrometer wavelength vary by one wideband and 7 narrowband filters. A single picture from the WFI will seize a portion of the sky bigger than a full Moon and shall be roughly 200 instances bigger than an infrared picture from Hubble’s Extensive Discipline Digicam 3.
Roman’s main mirror earlier than integration. (Credit score: NASA/Chris Gunn)
The WFI can be able to conducting wide-field slitless spectroscopy, utilizing a high-dispersion grism (a mix of a prism and a grating) and a low-dispersion prism. For calibration, Roman incorporates a spectralon “darkish aspect” that can block mild from house and mirror calibration mild onto the telescope’s detector. The wideband filter, seven narrowband filters, high-dispersion grism, low-dispersion prism, and darkish aspect are all built-in onto an Aspect Wheel Meeting (EWA), which rotates a component into the “lively” place to be used throughout observations. The EWA will permit scientists to simply swap between imaging and spectroscopy modes on the telescope.
Much more necessary to the WFI is the mercury cadmium telluride-based focal-plane array (FPA), which options 18 detectors developed by Teledyne Applied sciences. These detectors will convert mild mirrored by the telescope’s mirror into electrical indicators that scientists can analyze. The FPA has a 0.28-degree area of view and a decision of 0.11 arcseconds, which may be repeatedly targeted and calibrated by a set of hexapod actuators hooked up to the 18 detectors.
Roman is anticipated to conduct three predominant surveys with the WFI — the High-Latitude Wide-Area Survey, the High-Latitude Time-Domain Survey, and the Galactic Bulge Time-Domain Survey — comprising roughly 75% of the telescope’s five-year main mission.
The second Roman instrument is the Coronagraph Instrument (CGI), which, by observing in a extra targeted 0.575 to 0.825 micrometer wavelength vary, will instantly picture exoplanets as they orbit their host stars. The CGI, which is serving as a expertise demonstrator for future coronagraph devices and exoplanet missions, is able to this direct imaging by severely suppressing — or “blocking” — the sunshine from an exoplanet’s host star by twin deformable mirrors.
When Roman’s mirror displays mild from an exoplanet-hosting star system into the CGI, 1000’s of actuators hooked up to the 2 deformable mirrors transfer to vary the form of the mirrors to focus on the sunshine from exoplanets. Because the mirrors change form, masks conceal the host star, revealing the exoplanet(s) orbiting it. The altering shapes of the deformable mirrors throughout this course of are so exact that they will compensate for errors smaller than the width of a strand of DNA, and also will be used to right for small flaws and adjustments in Roman’s main mirror over the course of its mission. General, the CGI is anticipated to disclose exoplanets as shut as 0.15 arcseconds from their host stars.
Utilizing these two devices, Roman is anticipated to realize a number of science targets. These targets embody: researching darkish matter by measuring how gravity warps mild from distant galaxies by weak gravitational lensing; measuring how darkish vitality advanced over time by observing the shapes of galaxies and different astrophysical phenomena; discovering and monitoring exoplanets by way of microlensing, transits, and direct imaging; and conducting quite a lot of near-infrared astrophysics experiments and observations.
Roman’s launch on Falcon Heavy
SpaceX’s Falcon Heavy was contracted to launch Roman in July 2022. Falcon Heavy is an excellent heavy-lift launch car able to lofting payloads between 50,000 kg and 63,800 kg to low-Earth orbit relying on restoration configurations. {A partially} reusable launch car, the 2 aspect boosters and heart core are able to touchdown on concrete touchdown pads in Florida or floating droneships downrange within the Atlantic. Falcon Heavy stands 70 m tall, with its first stage that includes 27 Merlin 1D engines (9 engines on every booster) and its second stage that includes a single Merlin 1D Vacuum engine. Each phases make the most of liquid oxygen (LOX) and liquid kerosene (RP-1) propellants.
Launch is scheduled for 7:26 AM EDT (11:26 UTC) on Sunday, Aug. 30, from LC-39A on the Kennedy House Middle in Florida. In line with the forty fifth Climate Squadron of the U.S. House Pressure’s House Launch Delta 45, there’s a 50% likelihood of violating climate circumstances for the Sunday launch window. Within the occasion of a 24-hour scrub, the climate improves to a 30% likelihood of violating climate circumstances.
Booster B1072, flying for a 3rd time, will function one of many two aspect boosters for this mission after beforehand supporting the ViaSat-3 F3 and GOES-U Falcon Heavy missions. The opposite aspect booster, B1104, shall be flying for the primary time on this mission. Following booster engine cutoff (BECO) and separation, the boosters will return to land on the Cape Canaveral House Pressure Station, with B1072 touchdown at Touchdown Zone 2 (LZ-2) and B1104 touchdown at Touchdown Zone 40 (LZ-40). The middle core, which is being expended, is booster B1105.
Roman throughout payload fairing encapsulation forward of launch. (Credit score: NASA)
After rolling out horizontally to LC-39A, Falcon Heavy — with Roman encapsulated on high — shall be raised to its vertical place. On launch day, the SpaceX launch director will confirm that Falcon Heavy is go for propellant load at T-53 minutes. SpaceX’s Falcon household of rockets makes use of super-chilled propellants that may shortly boil off as soon as loaded onto the car, requiring groups to load propellant throughout the final hour of the countdown quite than hours beforehand.
At T-50 minutes, loading of RP-1 onto the middle core and boosters will start, with LOX loading starting 5 minutes later at T-45 minutes. At T-35 minutes, second stage RP-1 loading will start. LOX loading on the second stage is not going to start till T-18:half-hour.
Falcon Heavy’s 27 first-stage engines will start engine chill at T-7 minutes, a process that ensures the engines should not subjected to thermal shock at ignition. Falcon Heavy’s flight laptop is commanded to start remaining pre-launch checks at T-59 seconds, with the launch director giving the ultimate “go” for launch at T-45 seconds. The rocket’s propellant tanks are totally pressurized for flight at T-20 seconds.
Lastly, at T-6 seconds, the 27 Merlin 1D engines ignite, and Falcon Heavy and the Nancy Grace Roman House Telescope will liftoff from LC-39A at T0.
Falcon Heavy, with Roman encapsulated inside its fairing, sits atop LC-39A on Aug. 29. (Credit score: NASA/Joel Kowsky)
Roman and Falcon Heavy will expertise most aerodynamic strain (MaxQ) at T+1:08 minutes. BECO is anticipated to happen at T+2:24 minutes, with their separation coming three seconds later. Instantly after their separation, the boosters will flip 180 levels and start their boostback burns to return to the Cape. In the meantime, the principle engine cutoff (MECO) on the middle core comes at T+3:51 minutes, with stage separation three seconds later.
At T+4:quarter-hour, the fairings will separate, exposing Roman to the vacuum of house for the primary time. The aspect boosters’ entry burns start at T+6:19 minutes. The boosters’ touchdown burns are anticipated to start at T+7:23 minutes, with landings at T+7:40 minutes.
The second stage will shut down its engine for the primary time at T+8:28 minutes after which coast for 16 minutes. The engine will ignite for a remaining time at T+24:33 minutes and minimize off at T+26:32 minutes. Roman will in the end be deployed from Falcon Heavy at T+31:31 minutes, starting its month-long journey to L2.
Instantly following deployment, Roman groups will try to determine communications with the telescope. Then, just some hours later, they’ll start deploying the telescope’s photo voltaic arrays and different supporting methods.
(Lead picture: Falcon Heavy at LC-39A for the launch of the Nancy Grace Roman House Telescope. Credit score: Max Evans for NSF)
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