The farside of the Moon has always been a mystery and is only accessible by spacecraft. New compositional information from the Moon Mineralogy Mapper (M3) onboard Chandrayaan‐1 has identified a suite of highly unusual rock types exposed at small areas within the farside Moscoviense Basin. M3 is a state‐of‐the art visible and near‐infrared imaging spectrometer that was a guest instrument on Chandrayaan‐1, the Indian Space Research Organization’s (ISRO) first mission to the Moon. The instrument is designed to measure accurately the diagnostic mineral absorption bands of solar radiation reflected from the lunar surface.
Only about 59 percent of the moon's surface is visible to us here on earth.