Quick (dumb) idea..

[Sidoh]

Isn't outer space a perfect vacuum?

I suppose it depends on how you limit "outer space."  Are you talking about a cubic meter somewhere in an arbitrary point in the universe or are you speaking of the universe as a whole?  If I remember correctly, there's something like 30 Hydrogen atoms in the average cubic meter of space, but that's a horrible statistic, I'm sure.

A relatively small vacuum can be found in a relatively big reference frame.  For example, there's probably millions of billions of vacuums the size of a cubic picometer at your fingertip.  However, it's  impossible to say how long it will remain a vacuum due to particles moving into said region and phenomena such as virtual particles.

[rabbit]

I though it was 1H in general space/meter?

[Sidoh]

I though it was 1H in general space/meter?

Probably, but I don't see how that can be universally applicable.  I don't think anyone has been in the space surrounding every galaxy in the universe.

[rabbit]

Well, AFAWK, at least.  IIRC it was 1 for space and 100 for the atmosphere..or something.

[Sidoh]

Well, AFAWK, at least.

Which isn't very far.  I think it's silly to put it in such universal terms, although I understand the implied "to the extent our testing allows us to foresee."

[Blaze]

Way to make a funny topic dull and boring, Sidbbit! 

Well, iago, you tried and failed miserably.  The moral of the story is: Never try.

[deadly7]

Well, iago, you tried and failed miserably.  The moral of the story is: Never try.

Or, if you must: try the Max Power way!  It's guaranteed failure -- FASTER!