Exploration 6 Science and civilization 6 Scott, Montgomery (Fictitious character) 6 Space flight 6 Space ships 6 Sulu, Hikaru (Fictitious character) McCoy, Leonard (Fictitious character) 5 more ... Interplanetary voyages 4 Exploration of outer space 3 Kirk, James T. (Fictitious character) 3 Spock (Fictitious character) 3 Human-alien encounters 1 less ...