Mercury/Exosphere

Web Pages

 * http://en.wikipedia.org/wiki/Atmosphere_of_Mercury

Magnesium Detected in Mercury's Atmosphere (May 2009)

 * http://www.denverpost.com/headlines/ci_12267618
 * http://www.colorado.edu/news/r/3cc168fd0a6b2a95605dee1f60b4e03b.html