STEREO Camera Systems (IMAGE) Boston University School of Medicine Caption This is a schematic representation of the viewing geometry that allows the STEREO camera systems to make observations of Mercury's tail. Credit Boston University Center for Space Physics 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.