Answer» What is Institute of Space and Astronautical Science mean?
Institute of Space and Astronautical Science (宇宙科学研究所, Uchū kagaku kenkyūjo) (ISAS) is a Japanese national research organization of astrophysics using rockets, astronomical satellites and interplanetary probes which played a major role in Japan's space development. Since 2003, it is a division of Japan Aerospace Exploration Agency (JAXA).
