To a first approximation, space is a vacuum.
Most of the second approximation is hydrogen not helium.
Yes proportionally, there’s a fair bit of helium but most of what’s there is nothing.
Most of the second approximation is hydrogen not helium.
Yes proportionally, there’s a fair bit of helium but most of what’s there is nothing.
And if it doesn’t clump there, does it clump anywhere, or is there some reason it’s naturally diffuse?