We had to sacrifice many lives to destroy the queen in our galactic arm.

An advance into the galactic arm seemed inevitable.

We'll exit the galactic arm in two hours ten seconds of ship's time.

A narrow, restricted cloud separating from the leading edge of a galactic arm.

So the idea of looking for a 'first red dwarf' in our local galactic arm is hopeless.

We are from a distant sector of this galactic arm.

Hratchp, we have to learn what could stop a tree-of-life from growing right in the galactic arm.

They took their ships out to the galactic arm, and brought the laowon down upon us.

"We aren't really above the galactic arm so much as we're on the upper swell of it," Kirk told him.

Are responsible for constructing a number of artifacts in our galactic arm.