March 20 in Universe History: Space Missions, Astronomy and Exploration
March 20, 2026
1964
On March 20, 1964, the convention establishing the European Space Research Organisation (ESRO) entered into force, creating a joint European framework to pool resources for space science. ESRO’s programs, tracking and data facilities, and cooperative governance later fed into the 1975 merger that formed the European Space Agency for broader civil-space activities.
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