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European Space Agency (ESA) ○˒｜Definition｜1st｜20251119205401-00-⌔

European Space Agency - Wikipedia

European Space Agency

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The European Space Agency1 (ESA; pronounced/ˈiːsə/EE-sə)2 is a 23-member international organisation devoted to space exploration.3 It has its headquarters in Paris and a staff of around 3,000 people globally as of 2025.4 ESA was founded in 1975 in the context of European integration. Its 2026 annual budget was around €8.3 billion.[

The ESA human spaceflight programme includes participation in the International Space Station (ISS) and collaboration with NASA on the Artemis programme, especially manufacturing of the Orion spacecraft’s European Service Module (ESM). ESA launches and operates uncrewed missions to the Moon, Mars, Jupiter, Venus, Mercury, the Sun, and various comets and asteroids. Other activities include space telescopes, Earth observation satellites, asteroid impact avoidance, telecommunication and navigation satellites, designing launch vehicles (e.g. Ariane 6 is operated through Arianespace with ESA sharing in the costs), and maintaining Europe’s spaceport (the Guiana Space Centre in Kourou, French Guiana), as well as space safety5 and commercialisation.6

Printed 2026-06-28.

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Footnotes

  1. French: Agence spatiale européenne pronunciation, Italian: Agenzia Spaziale Europea, Spanish: Agencia Espacial Europea ASE;^{[5]}$$^{[6]} German: Europäische Weltraumorganisation ↩

  2. “Wording and phonetic – ESA Brand Centre”. brand.esa.int. Archived from the original on 25 August 2025. Retrieved 25 November 2025. ↩

  3. “Welcome to ESA: New Member States”. ESA. Archived from the original on 8 November 2019. Retrieved 26 July 2017. ↩

  4. “L’ESA: faits et chiffres”. www.esa.int (in French). Archived from the original on 30 November 2025. Retrieved 20 March 2026. ↩

  5. “Boost in funding expands Space Safety programme”. www.esa.int. Archived from the original on 29 November 2025. Retrieved 28 November 2025. ↩

  6. “CM25 delivers for business – launch of ACCESS signals a bright future for the European space sector”. 28 November 2025. Archived from the original on 11 December 2025. Retrieved 28 November 2025. ↩

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