ThesplendidauroralightdisplaysthatappearinEarth’satmosp...
问题详情：ThesplendidauroralightdisplaysthatappearinEarth’satmospherearoundthenorthandsouthmagnetic(磁的)poleswereoncemysteriousphenomena.Now,scientistshavedatafromsatellitesandground-basedobservations...