Who is an astrophysicist for the European Space Agency, Dirk Frimout or Georgi Ivanov?
Georgi Ivanov Major general Georgi Ivanov Kakalov (Bulgarian: Георги Иванов Какалов ; born July 2, 1940) is a retired Bulgarian military officer and the first Bulgarian cosmonaut. He was a member of the National Assembly of Bulgaria in 1990.
Max Pettini Max Pettini (born 15 June 1949) is a professor of observational astronomy at the Institute of Astronomy, University of Cambridge.