Astrophotography is probably one of the most difficult and specialized types of photography to try your hand at, but if you manage to get it right the rewards are some of the most astonishingly breathtaking images you are ever likely to see. The Royal Observatory Greenwich has just revealed the winners of its annual Astronomy Photographer of the Year competition, and the quality of the entrants was nothing short of spectacular. This year the competition attracted 4,602 entries from 90 different countries across the world, all presenting the universe in a new light and vying for the coveted prize of...