A representation of the magnetic field of the Milky Way
Source (http://www.esa.int/spaceinimages/Images/2014/12/The_magnetic_field_along_the_Galactic_plane)
More info (http://www.esa.int/Our_Activities/Space_Science/Planck/Planck_takes_magnetic_fingerprint_of_our_Galaxy)
danelabonte 