"We took one last look at the solar system before turning our attention to interstellar space."
Or we can pick up light that was on its way to interstellar space.
But not everybody had left something else out in interstellar space.
There was nothing else that could catch him, unless he turned to interstellar space.
"You've got to come out with us sometime and see interstellar space from here!"
The first three members have been detected in interstellar space.
By the way, how are we going to find a black box in the middle of interstellar space?
Since there's almost no matter in interstellar space, sound can't travel through it.
I wanted to touch interstellar space, to find out what it was.
We have no evidence it could exist in interstellar space.
Słownik astronomiczny