Where does Earth's mysterious 'ring current' come from? NASA and the US Space Force are launching a mission to find out

A new mission will attempt to chart a mysterious ring-shaped current surrounding the Earth, so that researchers can better protect satellites and power infrastructure from charged particles in space. The NASA mission, called STORIE (Storm Time O+ Ring current Imaging Evolution), will try to hunt down more details about this "ring current" that traps charged particles in a doughnut shape around our planet. …