The Moon Mineralogy Mapper, or M3 (pronounced M-cube), is one of eleven instruments that flew on board Chandrayaan-1, India's first deep space mission. A project of the Indian Space Research Organisation (ISRO), the goals of the mission were to expand scientific knowledge of the Moon, upgrade India's technological capability, and provide challenging opportunities for planetary research for the younger generation. M3 was funded by NASA as a Discovery Mission of Opportunity.
Chandrayaan-1 was designed to provide high resolution remote sensing of the Moon in the visible, near infrared, low energy X-ray and high-energy X-ray regions to be used in preparing a three-dimensional atlas and for chemical mapping of the entire lunar surface. The M3 instrument provided the finest detail over the broadest spectral range among all of the instruments that have ever flown to the Moon.