High Quality Content by WIKIPEDIA articles Yusuke Hagihara was a
Japanese astronomer noted for his contributions to celestial
mechanics. Hagihara graduated from Tokyo Imperial University with a
degree in astronomy in 1921 and became an assistant professor of
astronomy there two years later. At that time the Japanese
government sent him abroad as a traveling scholar. Hagihara went to
Cambridge University in England to study under the mathematician
H.F. Baker and also visited the University of Gottingen and the
Sorbonne. He returned to Japan in 1925 but left for the United
States three years later to study dynamical systems theory at
Harvard University under G. D. Birkhoff. Hagihara finished his
studies at Harvard in 1929 and returned again to the University of
Tokyo where, in 1930, he completed a D.Sc. dissertation on the
stability of satellite systems. He was promoted to full professor
at the University of Tokyo five years later. From 1945 to 1957 he
was the director of the Tokyo Astronomical Observatory and
subsequently was a professor at Tohoku University (1957-1960) and
president of Utsunomiya University (1961-1967).
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