Set to launch as early as September aboard a SpaceX Falcon Heavy from Kennedy Space Center’s historic Launch Complex 39A, the Roman telescope is expected to deliver sweeping, high-resolution views of the universe, helping scientists tackle some of the biggest unanswered questions in astrophysics.
Before it reaches the launch pad, however, the spacecraft will undergo final inspections, testing and fuelling inside Kennedy’s Payload Hazardous Servicing Facility (PHSF), a specialised clean room designed for handling sensitive space hardware and hazardous materials.
Originally opened in 1986 during the Space Shuttle era, the PHSF has supported a range of high-profile missions, including payloads linked to the Hubble Space Telescope and, more recently, the Mars 2020 Perseverance Rover and Europa Clipper.
In preparation for the Roman telescope, NASA’s Launch Services Program has overseen a series of upgrades to the facility, reflecting the extreme sensitivity of the telescope’s instruments. Among the most significant is a revamped air-shower system, which blasts high-speed, HEPA-filtered air over personnel and equipment before they enter the clean room, minimising contamination risks.
“Even something as small as dust or a strand of hair can affect a spacecraft’s performance,” said launch site integration manager Ryan Boehmer. “These instruments are incredibly precise, so maintaining a pristine environment is absolutely critical.”
To meet the telescope’s requirements, the facility will operate at ISO Class 7 clean room standards, stricter than its baseline certification supported by enhanced filtration systems. Engineers have also upgraded the heating, ventilation and air conditioning systems to ensure stable temperature and humidity in Florida’s notoriously hot and humid climate.
Inside the PHSF, temperatures are carefully held at around 21 degrees, with tightly controlled humidity levels to prevent corrosion or static discharge. The upgrades also extend to infrastructure, including improvements to compressed-air systems used to manoeuvre heavy equipment, and even repainting the facility’s 15-tonne crane to eliminate the risk of airborne paint particles.
Once inside, Roman will undergo final preparations, including cleaning, thermal protection work, solar array installation and fuelling with hydrazine propellant, a process requiring both stringent safety protocols and contamination control.
The telescope will operate alongside the James Webb Space Telescope and Hubble, offering a dramatically wider field of view up to 100 times greater than Webb, allowing it to scan vast areas of the cosmos. Scientists hope the mission will shed new light on dark energy, uncover distant exoplanets and reveal previously unseen features of the universe.
As Boehmer put it, the mission taps into something deeper: “When we start seeing these images, people will reconnect with that sense of wonder about what’s out there.”
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