Tails of Sodium (image) Boston University Medical Center Caption This image shows examples of the very long tails of sodium escaping from Mercury. These images were taken at the Boston University Station at the McDonald Observatory, run by the University of Texas in Austin. Reference: Orbital Effects on Mercury's Escaping Sodium Exosphere, Carl Schmidt, Jody Wilson, Jeffrey Baumgardner and Michael Mendillo, ICARUS, 2010. Credit Boston University Center for Space Physics Usage Restrictions None 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.