Overview
- NASA announced the Perseverance Sample Retrieval Architecture (PSRA) on November 9 to reexamine options for getting cached Mars samples back to Earth.
- The PSRA strategy team will begin work in January 2027 and deliver a final set of recommendations in winter 2027–2028 to guide any future mission choices.
- Perseverance has already collected and sealed multiple rock and soil tubes at Jezero Crater that must be located, retrieved, and transferred off Mars for Earth analysis.
- Independent reviews produced widely different cost and schedule estimates — roughly $8 billion for a 2035 return versus about $11 billion for a 2040 return — and those disparities prompted the new review.
- The review will weigh the many hard engineering steps — locating cached tubes, launching them from the Martian surface, moving samples to Mars orbit, and returning them under strict containment rules — while the Chinese Tianwen‑3 program, which targets a 2031 return of about 500 grams, adds external schedule pressure.