The Last Shift

On the night the station was to be shut down, Aris Tomlin was alone with it, the way the station had always preferred to be. Listening Post Cygnet-9 had been built at a time when the species still believed it would be answered. It hung at the cold outer fringe of the system, far past the last useful planet, a dish four kilometres wide and a habitat ring barely large enough to keep two technicians sane. For forty-one years it had pointed its enormous patient ear at the dark and recorded, with perfect fidelity, the sound of nothing whatsoever. The decision to close it had not been cruel. Aris understood that, and said so, often, to the empty corridors. The instruments aboard Cygnet-9 were four decades old. Better arrays existed now, closer in, cheaper to crew. The dark had been listened to and the dark had not replied, and a species with finite money does not keep a four-kilometre ear pressed to a silent wall forever out of sentiment. In eleven hours a relief tug would dock, Aris would be aboard it, and the station would be powered down to a cold beacon — not destroyed, just allowed, at last, to stop listening. Aris had volunteered for the final shift. The others had thought this was sad of him, and had said so, gently, in the way people are gentle with someone they have decided to feel sorry for. They were not entirely wrong. Aris was sixty, and the station was the longest relationship of his life, and he had wanted to be the one who turned off its light. He did not expect the universe to mark the occasion. The universe, in his professional experience of forty years, marked nothing. He spent the last shift the way he had spent ten thousand others. He walked the ring. He checked the seals. He ate a poor meal alone in a galley built for two and listened to the habitat make its small structural complaints, the ticks and sighs of metal that had been cold for a very long time. And at the eighth hour he went, as he always went, to the listening room, to read the feed one final time before the relief tug came. The feed was nothing. It was always nothing. Aris had a fondness for the nothing by now; forty years had taught him to read its texture, the soft hiss of the universe's background warmth, the occasional clean note of a distant dying star, the long grey static that was, in its way, the most honest sound there was. He sat down in the worn chair that had held the bodies of every technician before him and he watched the nothing scroll, and he prepared, without ceremony, to say goodbye to it. At the eighth hour and nineteen minutes, the nothing stopped. It did not become a voice. Aris would be precise about this later, to the people who asked him, and a great many people would ask him. It did not become music or language or any of the things four decades of hopeful crews had imagined into the static. It became a pulse. A single clean tone, perfectly regular, arriving from a point in the sky that the catalogue listed as empty — and between each pulse, a silence, and the silences were getting shorter. Aris sat very still. He had read every false alarm in the station's history; he had filed two of his own as a younger man. He knew the discipline. He checked the instrument against itself. He checked it against the beacon. He checked, with hands that he noticed were not quite steady, whether the signal was an echo of the station's own systems, and it was not, and could not be, because the station's systems did not count. That was the word that arrived in him and would not leave. The pulses were not repeating. They were counting. The interval between them was shrinking by a fixed, deliberate fraction each time, the way a number falls toward zero, and Aris Tomlin sat alone in a four-kilometre ear at the edge of everything, three hours before the species intended to stop listening forever, and understood that something in the dark had waited for exactly this moment to finally, precisely, begin.