The ice appears to be buried about half a meter beneath the lunar surface. There may be as much as three billion tonnes of water at each of the lunar poles. There may be slightly more at the north than the south pole. When they presented their initial results in March, the scientists said that the water was likely in the form of a fine frost spread through the lunar soil. Further data analysis suggests the exciting possibility that their may be shallow deposits of ice.
Scientists assume that comets carried the water ice to the moon.
We have got beautiful science from two or three of our instruments. The third, we just have not had time to analyse the data yet. We have not begun to touch on the many ramifications for the origin and evolution of the moon. Something special happened around Mare Imbrium - you do not see this sort of chemistry anywhere else on the moon.