Exploration 4 Interplanetary voyages 4 Science and civilization 4 Scott, Montgomery (Fictitious character) 4 Space flight 4 Space ships 4 Sulu, Hikaru (Fictitious character) more ... Exploration of outer space 3 Kirk, James T. (Fictitious character) 3 McCoy, Leonard (Fictitious character) 3 Spock (Fictitious character) 3 Human-alien encounters 1 less ...