This 13th colony, this other world, where is it, and what is it called?

7 seconds sound clip from the Battlestar Galactica (1978) movie soundboard.

You can hear this line at 00:39:57 in the Blu-ray version of the movie.

Quote context

[...]

- Our recorded history tells us that we descended from a mother civilization, a race that went out into space to establish colonies.

- Those of us here assembled now represent the only known surviving colonies.

- Save one, a sister world, far out in the universe, remembered to us only through ancient writings.

- It is my intention to seek out that remaining colony, that last outpost of humanity in the whole universe.

- Commander Adama?

- This 13th colony, this other world, where is it, and what is it called?

- I wish I could tell you that I know precisely where it is, but I can't.

- However, I do know that it lies beyond our star system, in a galaxy very much like our own, on a planet called... Earth.

- Flight Leader Serpentine, by your command.

- Report, Centurion, on the final assault.

[...]