There is a heliospheric current sheet[†], but it's not clear to me if/how it could be practically employed to achieve a sailing effect. [†] http://en.wikipedia

There is a heliospheric current sheet[†], but it's not clear to me if/how it could be practically employed to achieve a sailing effect. [†] http://en.wikipedia.org/wiki/Heliospheric_current_sheet http://en.wikipedia.org/wiki/Heliospheric_current_sheet