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A Game Of Questions


ghost-angel

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At STP? Or at average density over intergalactic space, which is the only scale on which use of yottameters makes any sense?

 

I did a Q&D Google search for 'atomic density of space' and got a few results that centered around 1 atom per cubic centimeter.  Assuming that ~75% of atoms in the universe are hydrogen (a number I got from the textbook my classes are using), from there's it's a pretty simple dimensional analysis conversion.

 

I'm not sure my search results took into account stars and galaxies rather than just 'space'--probably not, I would suspect.  So my number is almost certainly several (or many) orders of magnitude too low.

 

Clear enough?

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