[ExI] Chips The Size Of[interplanetary] Dust [and matrioshka brains]

Amara Graps amara at amara.com
Sun Sep 2 18:32:32 UTC 2007

>Last spring, I was at a lecture by Dawkins.  At dinner afterwards, Amara
>made an offhanded comment that has rattled around in my brain.  She said
>that interplanetary space carries a small net electrical charge.

Oops! Did I say that? How many glasses of wine did I drink ? ;-)

If you mean interplanetary dust instead of interplanetary space, then
yes, the dust particles are usually charged 1-10 Volts.

But if you really mean interplanetary space, which is another
expression for "plasma", then no, overall the plasma is neutral
(by definition).



Amara Graps, PhD      www.amara.com
Associate Research Scientist, Planetary Science Institute (PSI), Tucson
INAF Istituto di Fisica dello Spazio Interplanetario (IFSI), Roma, Italia

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