Moon is the heavenly body to which dozens of spacecraft, both manned and unmanned, have been launched. Many of them have explored the Moon successfully. Men have walked on the Moon and brought soil and rock samples from there.
Then, why new spacecraft like Chandrayaan-1 were launched towards the Moon? Don't we already know a lot about the Moon, thanks to many spacecraft that have already explored it in the past?
Of course, there are valid reasons for launching spacecraft towards Moon even today. It is true that earlier spacecraft have provided valuable information about the Moon in large amounts.
But still, there are many exciting things associated with the Moon about which we do not know for sure. The questions that confront humanity in this regard include: