Over the years, millions of school children must have written out their address in the same way – their house number and street, their town, their country, their continent, planet Earth, the universe… Following this simplest of patterns, taking each line of the address as a starting point, Tim Radford explores our place in the scheme of things – why we are attached to a particular geographical place and what significance do we have when faced with the realms of astronomy and astrophysics. ...