Water is likely to have accumulated on the Moon over billions of years, rather than during a single big event. Data from ISRO's Chandrayaan 1 mission was also used for the research. Water is likely to have accumulated on the Moon over billions of years, rather than during a single big event. Data from ISRO's Chandrayaan 1 mission was also used for the research. New Delhi: Previous observations by lunar spacecraft has revealed ta... [1232 chars]