That night, as the Heart of Gold was busy putting a few light-years between itself and the Horsehead Nebula, Zaphod lounged under the small palm tree on the bridge trying to bang his brain into shape with massive Pan Galactic Gargle Blasters; Ford and Trillian sat in a corner discussing life and matters arising from it; and Arthur took to his bed to flip through Ford’s copy of The Hitchhiker’s Guide to the Galaxy.