# NASA advances PRIMA far-infrared space telescope into Phase B development

- Published: 2026-11-07 03:02 UTC
- Section: Sky & Space › Astronomy
- Tags: PRIMA mission, far-infrared telescope, NASA Probe Explorers, Phase B development, JPL
- URL: https://realtech.media/news/rt-e5b39553e551a9b218599fc4_nasa_advances_prima/

**The Probe Explorers mission enters preliminary design with a targeted 2033 launch and a project cost cap of $1.2 billion.**

![NASA advances PRIMA far-infrared space telescope into Phase B development](https://realtech.media/media/2026/11/b8d976cafd8be4ff.webp)
*nasa.gov*

NASA announced that the PRobe far-Infrared Mission for Astrophysics (PRIMA) has been selected to move into Phase B, according to nasa.gov. This milestone advances the preliminary design and technology development for the mission, which is the first in the agency's new Probe Explorers class within the Explorers Program [1]. If approved after a confirmation review to enter Phase C implementation, the project cost is capped at $1.2 billion, excluding launch and other non-project costs, with a targeted launch date in 2033 for a five-year mission [1].

## Scientific goals and instrumentation

PRIMA features a 5.9-foot telescope configured to operate in far-infrared wavelengths [1]. This spectrum bridges the observational gap between existing infrared facilities, like the James Webb Space Telescope, and radio observatories [1]. Far-infrared observations will allow astronomers to trace how planets and their atmospheres form, how galaxies and black holes grow over cosmic history, and how dust and heavy elements accumulate across the universe [1].

To conduct these observations, the observatory is designed with two complementary instruments: an imager to map dust emission and measure polarization, and a spectrometer to track gas and heavy elements [1]. In current designs, the 1.8-meter telescope is cooled to about -268 degrees Celsius (4.5 kelvins) to suppress the instrument's own infrared emission, enabling the detection of faint signals from cold cosmic matter [1].

## Management and international collaboration

NASA's Jet Propulsion Laboratory will manage the PRIMA mission, supported by NASA's Goddard Space Flight Center and Marshall Space Flight Center [1]. The project was initiated following recommendations in the 2020 Decadal Survey, Pathways to Discovery in Astronomy and Astrophysics for the 2020s, which advised creating the Probe Explorers class [1].

The initiative involves international partners including CNES, ASI, DLR, CSA, KASI/KASA, JAXA, and the UK Space Agency [1]. In Japan, organized research activities began in June 2023 and transitioned in December 2024 into a working group at JAXA's Institute of Space and Astronautical Science to prepare domestic reviews for participation [1].

## Sources

1. [nasa.gov](https://www.nasa.gov/news-release/nasa-selects-far-infrared-telescope-as-first-in-new-mission-class/)
2. [EurekAlert](https://www.eurekalert.org/news-releases/1150642)

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Source: RealTech, realtech.media — https://realtech.media/news/rt-e5b39553e551a9b218599fc4_nasa_advances_prima/