You asked, so I have no choice but to reveal my fanatic love of the 2003 anime series called PlanetES. For background, the year is 2075 and Hachimaki is our hero trying to get a spot on the first manned mission to Jupiter. His background is orbital debris collection and he's normally not particularly philosophical, but he deserves credit for absolutely nailing this question.
Here's what he says (source):
Okay, I'll have to translate. These are my own words, so other translations are surely different by bits here and there.
My own "space" is pretty small. It's true that we all have worries and questions we can't answer but... but, there's no part of this world that's not a part of space, it's all connected to even me, so you can say space starts from me.
For context, he was back on Earth when he said this.
In the grand scheme of things, Earth is just another planet. The deeper realization is that everything we learn and everything we study is all inside-out. The most true picture of our universe is the vast sprawling cosmos, but we start from a tiny place within all of that. By maturing, we grow our own universe, in that things beyond us and beyond our planet become important to us. It's all backwards!
The concept of "space" is like a quirky parody of the human condition. Space is the fundamental nature of the world we live in. The rare moments when humans focus on space are the times when we are truly impartial. Every other thing on the internet, in our minds, in our language, are part of a highly specific experiment that is life on Earth.