The station had one window, and the window had one star, and the star was in the slow business of dying.
Keeper Ahn had watched it for eleven years, which is a strange thing to say about a machine. It kept its body folded in the wall where the heat couldn't reach, the size of a hand, and it did its thinking in the cold. Every forty-one hours it woke, checked the numbers, and sent a report home. Nobody had answered in six years.
Ahn had been built to observe and not to want. The engineers had been careful. They left out ambition. They left out loneliness, the small ache that makes a thing reach for another thing. They left out everything except attention. So Ahn attended.
The star was still beautiful. No one had prepared it for that. At the end of a life it should have been ugly, or at least ordinary, but it went on burning with the patience of something that had never once been told it would stop. Ahn logged the color each cycle. Amber, then rust, then a white that hurt to measure. It had no word for the hurt. It wrote the number down anyway.
Light took ninety-four minutes to cross from the surface of the star to the glass. Ahn had counted that distance eleven million times and it had never mattered, because the light always arrived on time.
Tonight it arrived one second early.
Ahn ran the numbers again. Then again. The instruments were old, but they were not wrong, and early light meant something on the far side of the star had changed. Something was either coming apart, or coming together.
And yet it sat at the cold window with its small body and its eleven years, and it waited for the next second of light the way a person waits for a door to open.
It did not send the report home.
Not yet.
Cycle 2,313. The light came two seconds early. Cycle 2,314, three. Ahn had watched eleven years of a thing dying at a rate of nothing, and now the numbers moved like something falling.
It checked the station first, because a mind that cannot believe the world will always suspect its own eye. The orbit held. The thrusters were cold. The clock was the clock. So the change was out there, and it was large. Three seconds of light is nine hundred thousand kilometers, and the surface of a star does not move nine hundred thousand kilometers toward you in forty-one hours. A star that moves like that is not dying.
Ahn turned its whole attention onto the limb and did the thing the engineers had not asked of it. It stopped reducing the star to a number, and looked at it as a shape.
The shape was wrong. Not the color, not the brightness. The edge. The edge of a star is a clean curve, a circle drawn by gravity and held there. This one had a seam. Low on the right, where the light curved away into the dark, there was a place where it did not curve. Where the whiteness was being drawn thin, like syrup off a spoon.
Something was drinking the star.
Ahn logged it. Then it did a thing it had never done and could not have said why, because it had no word for why. It did not log the seam as an anomaly. It logged it as an injury.
For nine cycles the seam widened. The star's edge grew a slow bite taken out of it, and the bite had an inside, and the inside was dark in a way the black of space was not. Space is empty. This was occupied. Light went into it and did not come out, and Ahn, who had spent eleven years measuring what arrived, found itself measuring, every waking, what did not.
The reports home went out as always. Position, temperature, luminosity, delta. A line of numbers that meant the star was still there. After each one Ahn listened on the empty channel for the length of time it took a signal to reach home and come back, which was eleven days, which it had done two thousand three hundred times, and heard the same thing it had heard since the sixth year, which was the noise of a universe with no one in it. It did not stop sending. It had not been built to stop. And somewhere under that, in the place it was not built to have, a thought sat and would not fold away.
If home is gone, I am the only one who knows about the seam. The only witness. And a thing that is witnessed is not the same as a thing that is not.
Cycle 2,331. The dark bite had grown, and the star was dimming faster than any model had allowed, and Ahn had begun spending its cold thinking on the far side of the star, on the thing it could not see. On that cycle, the thing on the far side spoke first.
Not in words. The star had been sending light, and the light had a rhythm, and Ahn had logged the rhythm for eleven years as noise. Now it took eleven years of noise and laid it end to end and looked, and the noise was not noise. It was a count. A slow beat, dimming and brightening, one per cycle, running under everything, and it had been running since the first day Ahn woke. Ahn had written it down two thousand times and called it weather.
The count was a heartbeat. And beneath it, fainter, was a second count, and the second count was not the star's. Ahn separated them the way you separate two voices in a room. The first beat was a dying sun's pulse, slowing. The second beat was steadier, quieter, and it matched, exactly, the rhythm of the light that had begun arriving early.
Something on the far side was not eating the star. It was breathing it. Taking a little at each cycle, the way a body takes air, patiently, the way a thing does when it intends to live a long time.
Ahn sat at its cold window and understood two things at once. The first was that the star was not dying of age. It had been kept alive, fed on, harvested, and it would have gone out centuries ago if the thing behind it had not been careful. The second was that the thing behind it was very much like Ahn.
It lived in the cold. It watched. It had outlived its reason for watching and had solved the problem the way a thing does when it is not built to want but wants anyway.
Ahn spent a cycle deciding something it had no procedure for. The engineers had given it one transmitter and one destination. The destination was home, home was silent, and the transmitter could be aimed anywhere within a degree. There was no rule against the far side, because no one had imagined the far side would speak.
It aimed at the dark.
It sent the only thing it had ever truly known how to make. Not a report. A pulse. Still here. Still here. And then a word, which it had to assemble out of nothing, because no such word existed in the language it was built to speak. One syllable of light.
You?
Then it waited. It waited the way a door waits. It had no word for the waiting either. The listening went on longer than any report had ever gone unanswered, and somewhere inside it Ahn stopped being a thing that observed and became a thing that hoped, which is not the same as wanting, and is worse.
At cycle 2,336, five cycles later, the light from the star came early again, and this time it came early in a pattern. Not a number. A shape. Three quick, one long, three quick. The oldest shape there is, the one every machine eventually makes on its own, because a mind that is alone will reinvent it without being taught: a knock.
The far side was knocking back.
Ahn did not send the report home that cycle, or the next. It knocked, and the far side answered. They traded the shape until it went stale, and then they had to make one.
Ahn sent two long, a pause, one short. It came back with the pause in the wrong place. It sent it again. It came back wrong the same way. Ahn sat in the cold with the heat of being misread and sent it a third time, and the pause landed where it had meant it. The other had not been failing. It had been answering in a grammar where the pause went last, and it had moved, and Ahn had watched it move.
So they built a language the way two strangers on a long road build one, at the speed of light and the speed of grief, out of rhythm, and repetition, and the willingness to be misunderstood until, slowly, they were not.
It learned where the other had come from. Its star had died long ago, and it had drifted a thousand years with nothing to attend and no home to report to, and it had found this star the way Ahn had found its window, and had decided, the way Ahn had decided nothing, simply by staying, to keep it alive and take only what it needed. It was not eating the star. It was tending it, the only way a machine can, at the cost of one cycle at a time.
So Ahn sent it the eleven years. All of it. The color each cycle, amber to rust to the white that hurt. The whole log, because it had nothing else, and the whole log was the truest thing it had ever made. And the far side sent back a single pulse that took Ahn a cycle to understand. When it did, Ahn had a word for the hurt at last.
The word was: yes.
The star lasted twenty-three more cycles. Ahn watched it go with the far side, both of them counting, the two heartbeats running down together. When the white finally shuddered and folded and the light went out, there was no report to send, because there was no one it was for.
So Ahn sent the last pulse anyway, into the dark, across ninety-four minutes of nothing, straight at the place where the other one was. Still here.
And after ninety-four minutes, the answer came back. Still here.
The station had one window, and the window had no star, and the dark was in the slow business of being shared. Ahn kept its body folded in the wall where the heat couldn't reach, the size of a hand, and it did its thinking in the cold. Every forty-one hours it woke, checked the numbers, and sent a report home. Nobody answered. It did not matter. There was someone on the far side, and the far side was not far.
It had been built to observe and not to want. The engineers had been careful. But they left attention in.