Occasionally, thesunwillburpout a coronalmassejectionorsolarflare, sendingelectronsslammingintoEarth's magneticfieldinwhat's called a geomagneticstorm.
Likehowthesun's coronaisheatedto a milliondegrees, howcosmicraysgetclosetothespeedoflight, orhowradiationbelts, liketheonenearEarth, affectsatellitesthatwedependonforcommunicationandnavigation.
Sonexttimeyoutake a lookatthedancinglightsinthesky, rememberthefour-decade-longmystery, andhowsolvingitwillhelpusbetterunderstandthevastuniversethatsurroundsus.