Mac OS X  2 RðTEXTMSWDÿÿÿÿ€¾¾2xpires" CONTENT="1 January 2025" wsun.htmlTEXTttxt âžTEXTttxt âž€²°ø–µd> The trapping of particles by magnetic fields was first studied by Kristian Birkeland in Norway, starting around 189º    ¯  ·  ÷  & <  W  X  ‡ ž  ¹  º  é 2  M  N *  ö  ÷ { Õ ç ¾¾2 ¾è.2styl €ÿÿ ¾