Esko Jorma Johannes Valtaoja (pronounced [ˈesko ˈʋɑltɑˌojɑ]; 1951, Kemi) is a Finnish professional astronomer and writer. Valtaoja works as a professor at the University of Turku where he studies quasars.In 2002 his book Kotona maailmankaikkeudessa (At Home in the Cosmos, 2001) won the Finlandia Prize for the best non-fiction work. After this he became a popular guest speaker at TV shows, science fiction conventions, popular science seminars etc.
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