Subject
Outer space Exploration
17
Astronautics International cooperation
9
Outer space Research International cooperation
9
Outer space Exploration Government policy
8
Artificial satellites Tracking International cooperation
2
Customs administration
2
Outer space
2
Outer space Civilian use International cooperation
2
Outer space Exploration International cooperation
2
Space environment
2
Space law
2
Space stations International cooperation
2
Appropriations and expenditures
1
Astronautics Research Law and legislation
1
Astronautics Technology transfer International cooperation
1
Astronauts Medical care
1
Gamma ray telescopes
1
Ground support systems (Astronautics) International cooperation
1
Launch vehicles (Astronautics) Law and legislation
1
Mars (Planet) Exploration International cooperation
1
Mars probes International cooperation
1
Medical care
1
Mercury (Planet) Exploration International cooperation
1
Navigation (Astronautics) International cooperation
1
Near-earth asteroids Exploration International cooperation
1
Officials and employees
1
Outer space Civilian use Government policy
1
Outer space Exploration Safety measures International cooperation
1
Outer space Government policy
1
Outer space International cooperation
1
Outer space Research
1
Outer space Research Law and legislation
1
Space flight Safety measures International cooperation
1
Space flight to Mercury International cooperation
1
Space flight to asteroids International cooperation
1
Space launch industry Law and legislation
1
Space mining Law and legislation
1
Space travelers Legal status, laws, etc
1
Space vehicle accidents Prevention International cooperation
1
Space vehicles Tracking International cooperation
1
Technology transfer Law and legislation
1