NASA has selected the PRIMA far-infrared space telescope to advance into preliminary design, making it the first mission in the agency’s new Probe Explorers class. The observatory is being targeted for launch in 2033, but it must still pass a confirmation review before full implementation.
What is PRIMA?
PRIMA stands for PRobe far-Infrared Mission for Astrophysics. Its proposed 5.9-foot telescope would survey the universe in far-infrared light, a part of the spectrum that can reveal cool dust, gas and other structures hidden at visible wavelengths. NASA says the mission would help fill an observing gap between facilities such as the James Webb Space Telescope and radio observatories.
What has NASA approved?
PRIMA is moving into Phase B, which develops the preliminary design and matures key technologies. This is an important selection, but it is not the same as final approval to build and launch. A later confirmation review will consider technical progress, schedule and cost performance before deciding whether the project is ready for Phase C implementation.
What could the telescope study?
The mission is designed to investigate how planets form, how galaxies and their central black holes evolve, and how dust, water and heavy elements accumulated through cosmic history. Far-infrared observations can trace star formation and planetary-system chemistry that other wavelengths may not show clearly.
How much could PRIMA cost?
If confirmed, NASA says the project cost would be capped at $1.2 billion, excluding launch and other non-project costs. The current plan calls for a five-year mission beginning in 2033. Both the schedule and budget remain conditional while design work and review continue.
Who will build and operate it?
NASA’s Jet Propulsion Laboratory will manage PRIMA, with participation from Goddard and Marshall space flight centres and international partners including agencies in France, Italy, Germany, Canada, South Korea, Japan and the United Kingdom. The partnership does not remove the remaining confirmation milestone.
Primary sources: NASA’s mission-selection announcement and NASA Science’s PRIMA and far-infrared science overview.
Reporting basis: official information available on 26 September 2026. Illustrative image: photo by Shot by Cerqueira on Unsplash.