After the Impact: the "Plume"

Da "NASA - Picture of the Day" del giorno 18 Novembre 2009:"In October 2009, the LCROSS Mission crashed a large impactor into a permanently shadowed crater near the Lunar South Pole and a "Plume" (---> pennacchio) of dust rose enough to be visible by the LRO, although hard to discern from Earth.

The Plume in question is now shown in this frame - taken in Visible Light.

The results of a preliminary chemical analysis gave a clear indication that such a Dust Plume contained water, and water is of high importance not only for understanding the history of the Moon, but also as a possible reservoir for future astronauts trying to live on the Moon for long periods.
The source of the Lunar Water is still a topic of debate (water could have been carried by many small meteorites, or a comet, or - maybe - it was an inborn component of the Primordial Moon Soil").