Space ships Interplanetary voyages 25 Space flight 19 Exploration 17 Human-alien encounters 16 Science and civilization 11 Vaisseaux spatiaux 11 more ... Exploration of outer space 9 Scott, Montgomery (Fictitious character) 7 Space colonies 7 Sulu, Hikaru (Fictitious character) 7 Interstellar travel 6 Space warfare 6 McCoy, Leonard (Fictitious character) 5 Robots 5 Astronautics 4 Enemies 4 Enterprise (Imaginary space vehicle) 3 Friendship 3 Kirk, James T. (Fictitious character) 3 Life on other planets 3 Manned space flight 3 Rencontres avec les extraterrestres 3 Spock (Fictitious character) 3 War 3 Astronauts 2 Astronaves 2 Closed caption video recordings 2 Design and construction 2 Extraterrestrial beings 2 less ...