Few days ago I saw the photo attached by 'shafri' in a comedy page of facebook hehe.
One expert here, was saying about same- comparatively sun has more potential difference than earth. Then I asked him- "then can't we get infinite electricity by plugging a negative wire in the earth and plugging positive wire in the Sun?"
He replied- "may be. But do not go to the sun to plug the wire during day time, the sun is very hot. So go there during night"
May be something interesting here....