Reading about the Thermocouple: http://en.wikipedia.org/wiki/Thermocouple I came upon: "... Principle of operation Main article: Seebeck effect In 1821, the German–Estonian physicist Thomas Johann Seebeck discovered that when any conductor is subjected to a thermal gradient, it will generate a voltage. ..." Does this effect apply and produce a radial electric field in a star and in the Earth? There is a temperature gradiant in both, and both conduct? Thanks for any help!