Human-alien encounters Space ships Interplanetary voyages 9 Exploration 8 Space flight 7 Science and civilization 6 Enemies 4 more ... Enterprise (Imaginary space vehicle) 3 Exploration of outer space 3 Friendship 3 Interstellar travel 3 Rencontres avec les extraterrestres 3 Vaisseaux spatiaux 3 Extraterrestrial beings 2 Manned space flight 2 Science fiction 2 Scott, Montgomery (Fictitious character) 2 Sulu, Hikaru (Fictitious character) 2 Women ship captains 2 Armes nucléaires 1 Astronautics 1 Astronaves 1 Audio-visual materials 1 Closed caption video recordings 1 Extraterrestres 1 Fantasy films 1 Fiction 1 Government information 1 Man-woman relationships 1 Nuclear weapons 1 less ...