What does "the final frontier" mean?

Question

im trying to write a poem

and i wanna use this line

but i want to make sure im writing it right.

Answer 1

It means the last unexplored region of anything.

Answer 2

The "Final Frontier" refers to the unexplored limits of space and the universe. The term originated from the original TV series "Star Trek" and was part of the monologue delivered by William Shatner before the space ship went flying across the screen. However the true author of the quote was from Ray Bradberry's earliest short story on space exploration.

Answer 3

As in Star Trek's "Space - the final frontier"? It just means the last unexplored area - the final adventure for those seeking the unknown. American frontiers men were those who explored the unknown areas in the American west - the final frontier would just be the last unexplored area in either a peticular region or, as the Star Trek phrase indicates, the ultimate unexplored, unconquerable frontier.