The truth may or may not be out there, but space is the place to look, and this fascinating guide takes it all in, from our own Moon to the furthest frontiers of the known universe – and then speculates about what lies beyond. To explore space is also to explore time: when we look at Andromeda – the nearest galaxy to our own Milky Way – what we see is light that left the galaxy two million years ago: we are literally looking back in time. The Rough Guide to the Universe is full of such nuggets, as well as being a practical resource for anyone who has ever looked in awe at the stars on a cloudless night.