View source for Wireless Radiation Beyond the Near Magnetic Field

Electromagnetic radiation in deep space, such as starlight, constitutes a propagated disturbance in the prevailing background magnetic field. EM waves can therefore either be directed along the magnetic lines of force, or perpendicular to them, or at any angle in between. With reference to the double helix theory of the magnetic field, the common denominator as between parallel radiation and perpendicular radiation will be established.
https://www.researchgate.net/publication/335169091_Wireless_Radiation_Beyond_the_Near_Magnetic_Field