NASA’s PRIMA to debut mid-cost Probe Explorer observatory line
The new mission class is meant to squeeze more science from NASA’s strained astrophysics budget between small Explorers and flagship observatories.
NASA plans to send PRIMA, the inaugural Probe Explorer, toward launch in the early 2030s, making it the first mission in a new observatory program. The program aims to produce more science for less money, occupying a middle ground between smaller Explorer projects and NASA’s multibillion-dollar flagships. Explorer missions have caps of a few hundred million dollars, while the Nancy Grace Roman Space Telescope cost $4.3 billion. Pressure on NASA’s science budget had recently left it unclear whether development of a Probe Explorer could begin.
Why it matters
By moving PRIMA toward an early-2030s launch as the first Probe Explorer, NASA is opening a new tier of space observatories designed to bridge the gap between capped Explorer missions and multibillion-dollar flagships like the Nancy Grace Roman Space Telescope. After budget pressure cast doubt on whether this line could even start, its progress signals a path to sustain astrophysics research with missions that aim for more science per dollar than existing options at either end of the cost spectrum.
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Sources
- Ars Technica