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The Chandrayaan-1 mission was launched in October 2008 and was terminated in late August 2009 due to a major failure on the spacecraft. Despite C1XS being hampered by an incredibly quiet Sun, C1XS was able to build on the initial work of D-CIXS. In addition to detecting Ca in many flares, C1XS also confirmed that Ti could be detected on the Moon with very weak C1 class flares and C1XS even detected iron with a modest C3 class flare (solar scientist established a scale for solar X-ray emission many years ago. The scale is A, B, C, M, and X. A to B is a factor of 10 increase in X-ray brightness of the Sun, and x10 to get to C and x10 again to get to M [“medium”] and another x10 to reach X [“extraordinary”]. So, A -> X is a factor of 10,000 increase in X-ray brightness! C3 is just x3 brighter than C1). Before C1XS flew it was believed that M5 flares (and above) would be needed to be capable of detecting iron on the lunar surface. These types of flares are significantly rarer than C3 flares. Therefore, the ability to detect iron with such weak solar flares means that instruments like C1XS could map iron over a much greater fraction of the Moon than previously thought. C1XS was also able to add the volatile elements sodium and potassium to the list of elements detected by X-ray instruments on the lunar surface. Read more