European crewed spaceflight: Can the ESA build independence at a reasonable cost?

The short version

Crewed spaceflight is shifting from a purely American domain to a potential European capability, but the path forward depends on political will and budget adjustments. According to Josef Aschbacher, the Director-General of the European Space Agency (ESA), Europe can develop its own capacity to send astronauts into space at a "very reasonable" cost.

This is not a declaration that the technology already exists or that a rocket is ready to launch tomorrow. It is a strategic assessment that the financial gap to build this independence is manageable. The core argument is that adding crewed flight capacity—and slightly more robotic ambition—would require a budget increase that is "very moderate" compared to the agency's current spending.

However, this proposal comes with a critical context: Europe currently lacks this capacity. Unlike the United States, China, or Russia, the ESA does not yet possess a vehicle to carry its own astronauts to orbit or the Moon. Until that changes, European astronauts, such as Sophie Adenot currently on the International Space Station, rely on American systems for access to space.

How it works

The mechanism here is not just about building a rocket; it is about budgetary reallocation and strategic autonomy.

For decades, the ESA has operated on a model of specialization and partnership. The agency focuses on specific modules (like the Orion service module for the US Artemis program) or robotic exploration, while relying on the United States to provide the actual transport for human crews. This arrangement has allowed Europe to participate in lunar ambitions without bearing the full cost of developing a crewed launch system from scratch.

The shift proposed by Aschbacher involves changing this dependency. The logic follows three steps:

1. Identify the gap: The ESA acknowledges that relying solely on the US is becoming risky, especially as US priorities shift or as geopolitical tensions rise. The agency notes that China and Russia are the only other nations with active crewed flight capabilities, but these are "not an option" for Europe due to political constraints.
2. Calculate the cost: The agency estimates that adding a crewed flight program would not require a massive overhaul of the entire budget. The additional effort is projected to be around 10% of the ESA's current budget.
3. Execute the build: This funding would support the development of new launchers and spacecraft to carry European astronauts, reducing the need to buy seats on foreign rockets.

The goal is to move from being a passenger in the global space race to being a driver of its own exploration agenda.

What is sourced

The claims in this guide rely on statements made by Josef Aschbacher during a meeting with the Association of Aerospace Journalists (AJPAE) in Paris, reported by 20 Minutes, France 24, and TV5MONDE.

• The cost estimate: Aschbacher stated that if the ESA were to add crewed flight capacity and increase robotic ambitions, the budget increase would be "very moderate". While he declined to provide a precise figure in euros, sources estimate this additional effort would represent roughly 10% of the agency's current budget.
• Current dependency: The reports confirm that until now, crewed flights were not a priority for the ESA. The agency has relied on the United States for astronaut access to space and for parts of its lunar exploration ambitions.
• Geopolitical constraints: Aschbacher highlighted that the only other countries capable of crewed flights today are China and Russia, explicitly stating that these are "not an option" for Europe.
• Existing partnerships: The ESA currently contributes to the US Artemis program by providing the service module for the Orion spacecraft, which transports crews to the Moon.

Caveats

It is essential to distinguish between a technical possibility and a political reality.

• "Reasonable" is relative: The term "very reasonable" is the Director-General's assessment of the cost relative to the strategic value of independence. It does not mean the program is cheap in absolute terms; a 10% budget increase represents a significant sum of money that requires approval from all ESA member states.
• No immediate timeline: The statements indicate that Europe "does not yet have this capacity." Developing a crewed launch system takes years of engineering, testing, and certification. The 10% estimate is a projection of the effort required to build that capacity, not a bill that can be paid today to get a rocket tomorrow.
• US withdrawal context: The push for independence is partly driven by concerns over US disengagement from certain lunar exploration projects. The urgency is linked to the fear that Europe could lose its seat at the table if it does not develop its own transport.
• Other players: The reports note that India is also preparing for crewed flights, adding to the competitive landscape where Europe currently lags in human spaceflight infrastructure.

What's next

The immediate future involves political decision-making. The ESA Director-General has called on political leaders to be "more audacious" in their funding choices. The upcoming International Space Summit in Paris is expected to be a key venue where these ambitions will be debated.

If the 10% budget increase is approved by member states, the ESA would likely begin the long process of designing and building a dedicated crewed launch system. This would eventually allow European astronauts to launch from European soil or using European vehicles, rather than relying on American rockets.

However, until that funding is secured and the technology is built, the status quo remains: European astronauts will continue to fly on US vehicles, and the agency will continue to rely on international partnerships for its human spaceflight goals. The "reasonable cost" argument is the first step in a long campaign to change that reality.

Going further

• 20 Minutes: ESA Director-General on crewed flight costs — The original report detailing the "very reasonable" cost estimate and the 10% budget projection.
• France 24: Europe's independence in space — Context on the geopolitical constraints regarding China and Russia, and the Artemis program partnership.
• TV5MONDE: The budget for autonomy — Analysis of the shift from relying on the US to developing independent capacity.