What is that sound? Emptiness? Despair? The beauty of looking out a window and seeing only an endless horizon of nothingness? Maybe it's all those things at once, emanating out of the last ship of humans in the universe as it blindly searches space for safety. At its simplest, the sound is no more than the groan of the original Battlestar Galactica's engine, churning on and on and on, never ceasing for those onboard. So click play, and keep Galactica's engine running for the next 12 hours — it's your first step toward feeling what it's like to be way up there, alone and without hope in deep space.