Artist's Concept of Heliosphere (IMAGE) NASA/Goddard Space Flight Center Caption This is an artist's concept of the heliosphere, a magnetic bubble that partially protects the solar system from cosmic rays. Credit Richard Mewaldt/Caltech Usage Restrictions None License Licensed content 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.