As a science writer, I'm always trying to find ways to make science more approachable. When I recently interviewed teacher and science communicator Alom Shaha, he suggested that being brought up in a family and with teachers who had a positive attitude to science - and who considered it fun, not a chore - had a significant impact. Inevitably this means that the old C. P. Snow 'two cultures' thing rears its head. I brought the two cultures into an article for the Royal Literary Fund on why I thought science fiction is considered not to be in the first rank of writing by many of those in the literary world. And it was writing this that inspired me to attempt to use a touch of science fiction as a bridge to make popular science more approachable in my latest book, Interstellar Tours . This is a book on the science of what's in our galaxy, from black holes and supernovae to planets and nebulae. There have been plenty of such books, but often they feel rather detached from