Overview:There are amazing astronomical objects to see in the winter night sky, and Sir Patrick Moore chose a few of them for his last Moore Winter Marathon. To find out how everyone got on, Chris Lintott and Lucie Green travel to the Kielder observatory in Northumberland to enjoy some of the darkest skies in Britain. Jon Culshaw joins them to take part in Patrick's final challenge, and the rest of the team set up their telescopes to try to catch an asteroid which is about to whizz past the Earth, closer than any before.