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Mauri Valtonen : ウィキペディア英語版 | Mauri Valtonen Mauri Valtonen is a Finnish astronomer and professor at the University of Turku. His fields of scientific interest include active galaxies, cosmology, and the three-body problem. Valtonen completed a Ph.D. from Cambridge University in 1975. He served as Director of Tuorla Observatory from 1980 to 2002 and returned to this position again in 2007. In 2008, Valtonen led a research team which argued that delay in the periodic outbursts from the nucleus of the active galaxy OJ 287 confirmed Einstein's general theory of relativity .〔M. Valtonen et al. (2008), ( A massive binary black-hole system in OJ 287 and a test of general relativity ). ''Nature'', 452, 851-853〕 ==References==
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