Up and down the country amateur astronomers are out in their back-garden observatories looking at stars, galaxies and nebulae. The team visits some astronomers on their own turf, to find out what keeps them up late at night.

Sir Patrick Moore selects celestial objects to observe in the winter night sky and challenges viewers to spot as many as possible. In the second part of the year's Moore Marathon, Sir Patrick has selected two lists to suit astronomers of all abilities - objects that can be seen with the naked eye or binoculars, and more remote ones observable only by telescope.