Observers now know there is water on the Moon, but how much? NASA's new LCROSS probe into the lunar surface will find out. Chris Lintott visits the Palomar observatory in California to witness the probe's impact, while Patrick Moore views it with friends from his home in Selsey. Can the Moon really support life?

Winter is approaching, and with longer nights, it is the perfect time to get outside and enjoy the wonders of the night sky. Sir Patrick Moore is joined by Dr Chris Lintott and Pete Lawrence, plus a host of stargazers, in a search for the best that the winter skies have to offer.