 If space were a vacuum, then the Sun's magnetic dipole field, about 10−4 teslas at the surface of the Sun, would reduce with the inverse cube of the distance to about 10−11 teslas.But satellite observations show that it is about 100 times greater at around 10−9 teslas.Magnetohydrodynamic (MHD) theory predicts that the motion of a conducting fluid (e.g.