Now Im going to down vote you! Just kidding its funny how personal folks take that.

Yea I see planets and moons orbiting them, or solar systems galaxies, or galaxies black holes. How you can predict when they will be at a certain point even thought we dont see them. Then an atom with its electrons orbiting them, how fare does it go? And all thats mostly a vacuum, oh but wait

Danm, that was one hell of answer thanks for the info although the units are abstract for me and I can't even remember Avogadro's law . Im probably getting this wrong but does this mean in 22.4 l of empty space there is one hydrogen atom? Thats super interesting how little hydrogen is in an atom, those strong nuclear forces.

The reason Im asking this is I was wondering if you could have a "net" that could collect these and other atoms, for a space ship. I was also interested how much hydrogen was there and how empty it really was. Its so crazy these coalesce into everything that built the universe.

Yea Iv seen the countless plans for them, it seems it would drive you crazy.

But the human body cant last that long in space with out gravity. Space sucks like that.

Its not really gravity its Centripetal acceleration right?

Its what you need if you have a space ship and didnt know were to go. Ask the voice command "find me the closest ring nebula".