Research Fields: distribution of mass in the Galaxy, high-velocity stars, planetary nebulae, definition of outer space, geostationary orbit, space debris, management of outer space. 1946-graduated from the Masaryk University in Brno, 1956-PhD in astronomy from the Charles University in Prague, 1961-DSc in astronomy, 1965-Corresponding Member of the Czechoslovak Academy of Sciences. Associate Professor, Masaryk University, 1952-1956. Visiting Professor, Northwestern University 1964. Director, Astronomical Inst. of the Czechoslovak Academy of Sciences 1968-1975. Chief, Outer Space Affairs Division, United Nations, New York 1975-1980. Medals: University of Liege 1969, ADION 1972, T. Hagecius de Hajek 1980, Nagy Ernö 1981, Zagreb Univ. 1982, City of Paris 1982, College de France 1986, Societé Astronomique de France 1992, Masaryk University 1994. 44 papers on stellar dynamics and planetary nebulae, Catalogue of Galactic Planetary Nebulae (jointly with L. Kohoutek) Academia Praha 1967. 60 papers and articles on the geostationary orbit, definition of outer space, space debris, protection of space environment.