Nasa’s Roman Space Telescope gets major upgrade in its quest to search space

Nasa’s Nancy Grace Roman Space Telescope team has achieved a significant milestone by successfully integrating the Roman Coronagraph Instrument onto the mission’s Instrument Carrier.

This crucial step took place at Nasa’s Goddard Space Flight Center in Greenbelt, Maryland, where the space telescope is currently being developed. The integration marks an important step forward in Nasa’s efforts to search for habitable worlds and, potentially, life beyond Earth.

The coronagraph, which was designed, built, and tested at Nasa’s Jet Propulsion Laboratory (JPL) in Southern California, arrived at Goddard earlier this year.

This instrument is part of Nasa’s next flagship astrophysics mission, set to launch no later than May 2027, and aims to explore scientific mysteries related to dark energy, exoplanets, and infrared astrophysics.

Search for exoplanets with advanced technology
The Roman Coronagraph Instrument is a technology demonstration designed to directly observe exoplanets by blocking the intense light from their host stars. This cutting-edge technology uses a suite of masks, prisms, detectors, and self-flexing mirrors to reduce the glare, making distant planets visible.

According to Rob Zellem, Roman Space Telescope deputy project scientist for communications at Nasa Goddard, “In order to get from where we are to where we want to be, we need the Roman Coronagraph to demonstrate this technology. We’ll be applying those lessons learned to the next generation of Nasa flagship missions that will be explicitly designed to look for Earth-like planets.”

The coronagraph’s goal is to test and showcase its capabilities in space, serving as a technological stepping stone for future missions like Nasa’s proposed Habitable Worlds Observatory, which could be the first telescope specifically designed to search for signs of life on exoplanets.

Integration and future plans
The coronagraph was mounted onto the Instrument Carrier, a large grid-like structure that connects the space telescope’s primary mirror and spacecraft bus. This process utilised the Horizontal Integration Tool, previously used for Nasa’s Hubble and James Webb Space Telescopes.

The coronagraph, which measures about 5.5 feet (1.7 meters) across and resembles a baby grand piano in size, was carefully positioned using specialised adapters and tools. The integration also involved adding insulation layers to ensure the instrument remains at the correct temperature in space.

Brandon Creager, lead mechanical engineer for the Roman Coronagraph at JPL, explained, “You can think of [the Instrument Carrier] as the skeleton of the observatory, what everything interfaces to.” The Instrument Carrier will eventually hold both the coronagraph and the mission’s primary science instrument, the Wide Field Instrument, which is scheduled to be integrated later this year.

Following the successful integration, engineers will conduct various checks and alignment tests to ensure everything is functioning correctly. Liz Daly, the integrated payload assembly integration and test lead for Roman at Goddard, shared the excitement, saying, “It’s really rewarding to watch these teams come together and build up the Roman observatory. That’s the result of a lot of teams, long hours, hard work, sweat, and tears.”

The mission has seen collaboration between Nasa, JPL, and international partners, including ESA, Jaxa, CNES, and the Max Planck Institute for Astronomy, highlighting the global effort in advancing space exploration technology.