All these comments but still I had to run a google search to be informed that there is no such thing, and “outer space” is simply a synonym for “space”.
I’m talking out my ass here but I think outer space literally meant “outer area” as in the area outside of our planet, and we’re so used to that term that it’s turned into the proper noun Space. Earth (or whatever celestial body is your current frame of reference) is implied to be the inner space.
All these comments but still I had to run a google search to be informed that there is no such thing, and “outer space” is simply a synonym for “space”.
I’m talking out my ass here but I think outer space literally meant “outer area” as in the area outside of our planet, and we’re so used to that term that it’s turned into the proper noun Space. Earth (or whatever celestial body is your current frame of reference) is implied to be the inner space.