We now know there are other solar systems far away in space, but are they like ours and is there life on these strange worlds? Sir Patrick Moore goes on the quest for little green men.

Amateur astronomers are scanning the night skies looking for asteroids, comets and supernovae, and making vital discoveries in our quest for knowledge. Meanwhile space missions produce millions of images, but who is to say which ones are truly unusual and interesting? It is a job that computers struggle with, but one in which humans excel. This, more than ever, is the age of the amateur astronomer and Sir Patrick Moore explains how everybody can play a part whilst also enjoying the beautiful cosmos.