Aurora over Sweden (IMAGE) KTH, Royal Institute of Technology Caption An aurora appears over Uppsala, Sweden, in late January, 2021. Such phenomena can result when plasma jet occur in Earth's magnetosphere. Credit Kjell Carli/KTH Royal Institute of Technology Usage Restrictions Credit must be given to the creator. License CC BY Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.