On August 3, 2004, NASA launched a robotic spacecraft that will orbit the closest planet to the Sun and the eighth largest planet of the solar system, Mercury. Can you remember, what was the name of that space craft? It’s MESSENGER (an acronym of MErcury Surface, Space ENvironment, GEochemistry and Ranging). However, MESSENGER successfully entered Mercury’s orbit on March 18, 2011 and since then it has been studying the planet’s chemical composition, geology, and magnetic field. Recently, MESSENGER has revealed the chemical diversity on Mercury’s surface.