Dirk Dries David Damiaan, Viscount Frimout (born 21 March 1941 in Poperinge, Belgium) is an astrophysicist for the European Space Agency.
 He flew aboard NASA Space Shuttle mision STS-45 as a payload specialist , making him the first Belgian in space .
Telespazio VEGA UK Ltd. is a British space company based in Luton, Bedfordshire.
 Founded in 1978 by a small group of engineers at the European Space Operations Centre (ESOC) in Darmstadt, Germany, VEGA now works with Space agencies, satellite operators and manufacturers around the world.
 It works with the European Space Agency (ESA) and ESOC in Germany, European Space Research and Technology Centre (ESTEC) in Noordwijk, the Netherlands, ESA Centre for Earth Observation (ESRIN) in Rome, Italy, and European Space Astronomy Centre (ESAC) in Madrid, Spain.
The ESA Centre for Earth Observation (also known as the European Space Research Institute or ESRIN) is a research centre belonging to the European Space Agency (ESA), located in Frascati, Italy.
 It is dedicated to research involving earth observation data taken from satellites, among other specialised activities.
 The establishment currently hosts the European Space Agency's development team for the Vega launcher.
Frank, Viscount De Winne (born 25 April 1961, in Ledeberg, Belgium) is a Belgian Air Component officer and an ESA astronaut.
 He is Belgium's second person in space (after Dirk Frimout).
 He was the first ESA astronaut to command a space mission when he served as commander of ISS Expedition 21.
 ESA astronaut de Winne serves currently as Head of the European Astronaut Centre of the European Space Agency in Cologne/Germany (Köln).
Matthew Graham George Thaddeus "Matt" Taylor (born 1973) is a British astrophysicist employed by the European Space Agency.
 He is best known to the public for his involvement in the landing on Comet 67P/Churyumov–Gerasimenko by the "Rosetta" mission (European Space Agency)'s "Philae" lander, which was the first spacecraft to land on a comet nucleus.
 He is Project Scientist of the "Rosetta" mission.
The Director General of the European Space Agency is the highest-ranked official of the European Space Agency (ESA), a space agency formed by the collaboration of prominent European nations.
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.
Interbol (Russian: Интербол ) is an international space project under the leadership of the Russian Space Agency and the Space Research Institute of the Russian Academy of Sciences.
 The list of participants includes the Institute of Atmospheric Research of the Czech Academy of Sciences, NASA, European Space Agency, Japan Aerospace Exploration Agency, and the Canadian Space Agency.
 The goal of the project is to study the correlations between plasma processes in the tail of the magnetosphere and in the Van Allen radiation belt (auroral particles acceleration region) with a high time-space resolution.
 Two space probes have been launched into high-altitude elliptical orbits:
The Austrian Space Agency, since 2005 officially Aeronautics and Space Agency (German: Agentur für Luft- und Raumfahrt) is an organization whose purpose is to coordinate Austrian space exploration-related activities, both national programs and European Space Agency related programs.
 It was established in 1972 in Vienna.
 In 1987, Austria became a member state of the European Space Agency.
Marko Lerinski (Bulgarian: Марко Лерински , "Marko of Florina"; 20 June 1862 – 13 June 1902) was the nickname of Georgi Ivanov Gyurov (Георги Иванов Гюров), also known as Georgi Geroyski or Marko Voyvoda, a Bulgarian military man and revolutionary.
 A prominent member of the Internal Macedonian–Adrianople Revolutionary Organization (IMARO), Lerinski was the first person to propose a common anti-Ottoman uprising in Macedonia and Eastern Thrace.

Question: Who is an astrophysicist for the European Space Agency, Dirk Frimout or Georgi Ivanov?
Answer: Dirk Dries David Damiaan