Astrophysicist
Planetary Scientist
Cosmonaut
Chairman and CEO of Kaspersky Lab
Musician and astrophysicist
Astrophysicist, Nobel Laureate
Astronaut
Astronaut
Ethologist, evolutionary biologist
Aeronautical Engineer and Astrophysicist
Mathematician and Engineer
Doctor in Astronomy
Astrophysicist, planetary scientist
Professor of physics, author and broadcaster