ESA Reserve Astronauts Complete Training Program

The European Space Agency has announced that its reserve astronauts have completed their training program as of May 22, 2026. This milestone marks the end of a rigorous preparation phase designed to ensure a pool of flight-ready personnel for future missions.

Among those who have completed the curriculum is Sara García Alonso, a Spanish astronaut. The completion of this training indicates that these individuals have met the technical and physical requirements necessary to support the agency’s human spaceflight operations.

The training program for reserve astronauts is designed to mirror the basic training provided to the primary astronaut corps. This ensures that reserve members are fully capable of stepping into active roles or being assigned to specific missions on short notice.

The curriculum typically encompasses several critical domains of spaceflight preparation, including instruction on spacecraft systems and orbital mechanics. Candidates also undergo survival training to prepare for various emergency landing scenarios and linguistic training to facilitate communication with international partners.

The role of a reserve astronaut is a strategic component of mission safety and flexibility. By maintaining a cohort of fully trained reserves, the European Space Agency provides essential redundancy, ensuring that missions can proceed even if a primary crew member becomes unavailable due to medical or personal reasons.

This group of astronauts was selected as part of a recruitment drive that began in 2022. That selection process was aimed at expanding the agency’s human spaceflight capabilities to meet the demands of increasing orbital activity and future exploration goals, including lunar missions.

Now that the basic training program is complete, these astronauts are eligible for assignment to specific missions or can undergo further specialized training tailored to the requirements of upcoming spaceflights.