This poster commemorates the 13th Planetary Congress of the Association of Space Explorers (ASE). The Congress took place September 12-19, 1997 in San José, Costa Rica. Bearing the authentic signatures of thirty-nine of the participating astronauts from fifteen nations, it is part of a series of limited collector’s edition posters that have been produced and signed at each ASE Congress since the Association was founded in 1985. Ninety-seven posters were signed at the 13th Congress. The poster has three headings, the main headings in English at the top, with the Russian displayed at the bottom. Around the periphery are printed translations of “Association of Space Explorers” in the native languages of all individuals who have flown in space. Clockwise, from upper left with English at the top, they include Romanian, Dutch, Japanese, Czech, Arabic, Polish, Spanish, Hungarian, Kazakh, Vietnamese, Italian, Bulgarian, Afghan, Hindi, Mongolian, German and French. The background is taken from NASA archive photo # 83 HC 213 which has been used for each set of posters in the series. The central image of the poster represents the Congress theme “Space Technology for Sustainable Development.” The image shows the Shuttle/Mir stack superimposed over a picture of Costa Rica taken from space, representing international cooperation and the use of space technology in the pursuit of sustainable development. The image illustrates the conviction of ASE members that space technologies can facilitate the resolution of the many environmental challenges we face on Earth. At the 13th Congress, the participating ASE members discussed the contributions that space flight technologies can make to the development of modern society and to the improvement of the human condition on our home planet. # in series: 97 Signature key included