Vacuum/Legends

"I don't want to hear any more words from you, either. So you're going out where things don't make any sound. We're surrounded by vacuum now, Fett. Take a deep breath, because it'll be your last. I'm going to enjoy turning this ship around to take a look at what's left of you, after your blood's boiled away and your body's exploded from depressurization. I've heard that the process takes just long enough for you to feel it; maybe a second or two. I bet they won't go by fast, either."

―Bossk, to Boba Fett^[src]

Vacuum was a volume of space that was absent of atmosphere. Most of realspace consisted of it. While most beings could not survive in a vacuum, particular outer space, some vacuumbreathers could.

Behind the scenes

While sound can be heard from spaceships in many Star Wars works, in reality, sound waves cannot travel through a vacuum. Nor can seismic waves, though they are shown doing so in Attack of the Clones. Conflicting sources exist as to whether the characters themselves can hear the sounds, or if they can be considered part of the soundtrack and are not diegetic.