"But that could take millions of years, if they were in intergalactic space!"

Or a droll way of saying that, seen from intergalactic space, those two places are really quite close to each other?

They had emerged in the empty void of intergalactic space.

"But how can there be a shortcut in intergalactic space?"

In a way, it's good we came out in intergalactic space.

Half of its existence had been spent traversing intergalactic space.

We're almost past all of our inhabited planets and will be coming out soon in intergalactic space.

To the other, the side that faced intergalactic space, the rainbow was almost dark.

He would find himself heading out into intergalactic space, with no means of changing his course.

There was no reason for it to take to intergalactic space.