What is the density in atoms per unit volume of most nebulas?

AI Thread Summary
Most nebulae have a density of only a few hundred atoms per cubic centimeter, which is significantly less dense than the best vacuums created on Earth. This low density makes it challenging to visualize what being inside a nebula would be like, as the sparse distribution of atoms would limit visibility. The discussion highlights the contrast between the vastness of space and the relative emptiness of nebulae. Understanding this density helps in conceptualizing the environment of these cosmic structures. Overall, nebulae are incredibly diffuse regions of space.
dav2008
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Or is it Nebulae...anyways

What is the density in atoms per unit volume of most nebulas? I am just looking for a rough estimate to help me picture it..

And what would it look like if u were inside one..would u even see anything?
 
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Good question with an interesting answer.
excerpt from http://itss.raytheon.com/cafe/qadir/q1929.html

"density of only a few hundred atoms per cubic centimeter, most nebula are better then the best vacua we can make on the earth"
 
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