If you go to The Sky At Night TV programme website http://www.bbc.co.uk/programmes/b006mk7h and scroll down, you'll find the April Moore Marathon Observing guide. It lists 55 things to look for to celebrate 55 years of the programme. My telescope is not for stars but I took this photo of the Moon. 3/4 of the way up on the left hand side, there a small dark crater in a lighter band. This is the crater Plato, one of the 55 objects. The section around it is called the Alpine Valley, another of the objects.