French astronaut Arnaud Prost, currently a military pilot, will fly to space alongside Thomas Pesquet in 2027 under an agreement between France and the private American aerospace company Vast. Announced by French President Emmanuel Macron during the Choose France summit, the missions include a commercial flight to the Haven-1 space station and an International Space Station command assignment.
Commercial Orbital Transit and the Post-ISS Era
As the International Space Station nears its scheduled 2030 deorbit timeline, national space agencies are actively pivoting toward commercial low-Earth orbit infrastructure. The executive announcements made on June 1 outline an unprecedented bilateral shift. Thomas Pesquet, who commanded the ISS in 2021, is slated to lead the 14-day PAM-6 private mission to the ISS during the summer of 2027. According to program plans, this marks the first instance of a non-American astronaut commanding a capsule flying under the United States flag.
Meanwhile, Arnaud Prost faces a different operational mandate. Born in Marseille in 1992, Prost graduated from École Polytechnique in 2015 and earned an engineering degree from ISAE-SUPAERO in 2017, alongside a master’s degree in astrophysics and space planetology from the University of Toulouse. Appointed to the European Space Agency reserve astronaut corps in 2022, he has served as an armament engineer for the Direction générale de l’armement (DGA) and pilots E-3F AWACS aircraft for the French Air and Space Force.
Flight Testing the Haven-1 Architecture
Prost will serve as the flight test engineer for a crewed mission targeting Vast’s Haven-1, which is set to become the first commercial space station in orbit. According to statements from the Centre national d’études spatiales (Cnes), this assignment positions Prost within a specialized group of aviators executing maiden crewed flights aboard novel spacecraft.
Engineering teams from both Cnes and the European Space Agency are collaborating on mission profiles and procedural frameworks. Commenting on Franceinfo, Prost noted the rigorous preparation ahead. C’est un rêve d’enfant, c’est une grande étape dans ma vie,
he stated, adding that it will require deux semaines pour réaliser tous ces essais.
He also highlighted the industrial milestone, remarking, C’est une nouveauté, la première fois qu’un astronaute européen sera impliqué dans un vol d’essai dans le développement d’une station.
Budgetary Pressures and Institutional Trade-Offs
While the partnership secures prominent flight slots in commercial ecosystems, it has sparked friction on the domestic front. The political push to maintain human spaceflight prominence unfolds alongside stringent fiscal contractions. Shortly after the initial presidential announcements, the executive branch requested that Cnes trim its budget by 330 million euros over a three-year window—amounting to a 20% reduction in expenditures.
Scientific communities have raised concerns that these funding cuts could jeopardize critical Earth observation and atmospheric monitoring initiatives just as climate systems face accelerating pressures. Balancing commercial crew participation against core environmental monitoring budgets remains a central institutional challenge for European space administration as the orbital landscape transitions from state-run monoliths to private sector habitats.
