Density of empty space

What is in the vacuum of empty space ??

I read somewhere that the density of Neutrinos is about 150 per cm3. But
even in the most empty expanses between galaxies there must be some presence
of hydrogen and oxygen, the progenitors of all other matter, scattered as
the result of the Big Bang. What is their atomic density per meter3 or cm3.
Surely some heavier elements escaped into so-called empty space from their
super nova origins and by now permeate the Universe.

Any ideas ??

Hagar wrote:
What is in the vacuum of empty space ??

I read somewhere that the density of Neutrinos is about 150 per cm3. But
even in the most empty expanses between galaxies there must be some presence
of hydrogen and oxygen, the progenitors of all other matter, scattered as
the result of the Big Bang. What is their atomic density per meter3 or cm3.
Surely some heavier elements escaped into so-called empty space from their
super nova origins and by now permeate the Universe.

Any ideas ??


http://en.wikipedia.org/wiki/Orders_...itude_(density)


Double-A

"Hagar" wrote in message ...
What is in the vacuum of empty space ??

I read somewhere that the density of Neutrinos is about 150 per cm3. But
even in the most empty expanses between galaxies there must be some presence
of hydrogen and oxygen, the progenitors of all other matter, scattered as
the result of the Big Bang. What is their atomic density per meter3 or cm3.
Surely some heavier elements escaped into so-called empty space from their
super nova origins and by now permeate the Universe.

Any ideas ??

Google: interstellar medium