Tima Sergienko

Last March, reindeer out for an evening snack on the Scandinavian tundra, as well as other nighttime observers, saw an unusual display of bright purple and green clouds intersecting an auroral display in an otherwise clear sky. Nature provided the aurora, but the clouds were courtesy of a sounding rocket that released barium into the atmosphere to help reveal the electrodynamics near the aurora.

Posted inEditors' Highlights A new study finds that assimilating observations of the ionosphere and thermosphere reduces the error in model predictions more than modeling either one individually. Posted inNews After a decade-long search, scientists captured a type of elusive aurora on camera. Posted inFeatures The deputy head of the Austrian Space Weather Office built a supportive network.

Posted inNews After a decade-long search, scientists captured a type of elusive aurora on camera. Posted inNews Data collected by the BepiColombo spacecraft traces the causes of the strange aurora, which course through the planet’s weak magnetosphere. Posted inNews A NASA-funded crowdsourced science project has converted the unheard sounds resonating inside Earth’s magnetic shield into audible tracks, revealing an orchestra of whistles, wooshes, and chirps.