Magnetar SGR 0501+4516 (IMAGE) NASA/Goddard Space Flight Center Caption SGR 0501+4516, illustrated here in an artist concept, is a member of a select class of objects called magnetars. These stellar remnants are the most magnetized objects in the cosmos. Only 15 are known. Credit NASA/Goddard Space Flight Center Conceptual Image Lab 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.