... P. Frick, R. Stepanov, R. Beck, D. Sokoloff, A. Shukurov, M. Ehle, A. Lundgren, Magnetic and gaseous spiralarms in M83, Astronomy and Astrophysics, 585, id. ...
... field lines means that when a particle spirals around a cone of converging field ... The motion of electrons and ions spiraling around magnetic field lines is also ...
... a jet plane constantly flying westward, or a mad dash from one pole to the other at equinox, along a spiral following the Sun ... it is a very pretty place, with old alleys and modern stuff--I think it was armed forces day then, with extra festivities ...