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      | THE
          ESA'S ROLE IN SPACE |   
	  |  | Contributions from the ESA played a large
        role in the construction of Spacelab, an important predecessor to the
        world’s first International Space Station. On Sept. 24, 1973, a memorandum
        of understanding was signed between the ESA, then known as the European
        Space Research Organization, and NASA with NASA's George C. Marshall
        Space Flight Center as lead center for ESA to design and develop Spacelab.
 
 The ESA had 11 member nations at the time of Spacelab development: Belgium,
        Denmark, France, Ireland, Italy, the Netherlands, Spain, Sweden, Switzerland,
        the United Kingdom and West Germany. All except Sweden participated in
        the Spacelab program.
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