“To Boldly Go Where No Man has Gone Before”

This is an example of a ’split infinitive’.  A split infinitive is an English-language grammatical construction in which a word or phrase, usually an adverb, occurs between the marker to and the bare infinitive (uninflected) form of a verb. (Between to and go.)  This is an issue that has been widely debated by scholars of the english language for the last couple centuries. The debate is whether or not it is proper grammatical style, and if it is, when is it appropriate.