Moon crash

I'm not sure if you guys have been keeping up with space news but last month a lunar orbit satellite was deliberately crashed into the surface of the moon. It was at the end of its life expectancy and NASA wanted to monitor what would occur when it was slammed into the lunar surface.
In the past couple of days they've released some excellent footage from shortly before the crash landing showing the lunar surface in incredible detail at just above 9km from the surface.

Make sure you watch it in HD:

The actual GRAIL designs and mission spec is some interesting reading as well.