MUMBAI: With India’s second lunar mission Chandrayaan-2 set to be launched in early January 2019, nearly 70 scientists from different colleges, research organisations and Isro centres across the country gathered on Thursday at the space agency’s headquarters in Bengaluru for a lunar science meet.The meet focused on areas like water and volatiles on the moon, its surface and sub-surface composition, studies on near-surface plasma environment, lunar ionosphere and the potential scientific advancements arising out of Chandrayaan-2 observations from pre and post landing data.The participants also identified sectors which called for further strengthening and new areas of lunar science which can be initiated. Isro chairman K Sivan has been quoted as saying that many technological issues have to be tackled before the launch. Among the major challenges are the integration of the fifth liquid engine to manage the additional load of the lander.