Space

3. Name of an intergovernmental organisation of 22 member states (France is one of them) dedicated to the exploration of space.
4. Type of ray that Sputnik studied
8. Space station placed in low Earth orbit permanently occupied by an international crew
11. Vehicle used for travelling in space
13. Name of a cape on the Florida coast used by the US Air Force to launch rockets
14. Name of an animal and also the lunar module of Apollo 11
15. My trajectory is ellipse-shaped, I come back on a same point of my ellipse every cycle. Churyumov–Gerasimenko is one of them.
17. Sputnik is one of them
19. Name of a robotic European Space Agency lander that accompanied the Rosetta spacecraft.
20. Government agency responsible of the US space program

1. Space probe created by NASA to study the solar system
2. Name of and American astronaut who said “That's one small step for man, one giant leap for mankind”
5. Curved path of a celestial object or spacecraft round a star, planet, or moon
6. Fourth planet of the solar system, its nickname is the red planet
7. Name of the tense relationship between the United States (and its allies), and the Soviet Union between the end of World War II and the fall of the Soviet Union
9. Name of the female dog sent into space in 1957
10. Name of the spaceflight that first landed humans on the Moon
12. Name of a car-sized rover designed to explore Mars as part of NASA's Mars Science Laboratory mission
16. A Soviet Air Forces pilot and cosmonaut who became the first human to journey into outer space
18. Name of a program organized by NASA in the second middle of the 20th century in search of microbial life on the surface of Mars.