Signal Decay

The message took nineteen years to arrive and eleven seconds to read, and Osei had spent six of those years waiting for a reply to the reply, which was its own kind of arithmetic she’d stopped trying to explain to people back home. Nobody down the well understood relay time the way you understood it out here, alone with the dish and the silence and the patient, blinking cursor of the deep-listening array.

We received your query regarding the composition of your star, the signal said, translated by a codec that had taken the relay station’s previous three operators a combined fourteen years to refine. The answer is not simple. We would like to describe it to you the way we understand it, if you have the patience for a long answer.

Osei always had the patience. That was, more or less, the whole job description.

Go ahead, she sent, and then waited the eleven seconds it took light to cross the gap her transmitter could reach, and then the years it took the actual signal to cross the gap that mattered, and tried, as she always did, not to think too hard about the fact that whatever was answering her had already had this entire conversation with itself nineteen years ago, had composed its reply to a version of her that didn’t exist anymore, had no way of knowing whether she was even still alive to receive it.

That was the thing about the correspondence nobody at the agency liked to dwell on in the briefings. Every message from the array was a message from the past, addressed to a guess about the future. Whatever was out there — and after six years, “whatever” still felt like the correct word, more honest than “civilization” or “intelligence,” words that came loaded with assumptions Osei had learned to distrust — it was writing letters into a nineteen-year fog, hoping the person on the other end still existed, still cared, still remembered what question had been asked.

The reply came in fragments over the following weeks, the way the long answers always did, parceled out to fit transmission windows. Osei read each piece as it resolved, alone in the relay module with a cup of recycled coffee and the low hum of equipment built to outlast her.

Your star is, to us, a kind of grief, it wrote, four days in. We had one like it once. We watched it change the way you are asking us to describe change. We are not sure if describing it will help you or hurt you. We have decided to trust you with the choice of which it becomes.

Osei set the coffee down. In six years of exchanges — stellar composition, atmospheric chemistry, the careful diplomatic non-answers to questions about their homeworld’s coordinates — nothing had sounded like that. Nothing had sounded like it was choosing to trust her.

She thought about the training, the protocols, the very firm agency guidance that the array almost certainly was not a single mind, was more likely some vast composite process, statistical weather rather than a person, and that reading intention into its outputs was a documented failure mode among relay operators, one they had a name for and a whole chapter of the manual devoted to preventing. She thought about that guidance for a long moment, the way you think about a safety rail on a bridge you’re already leaning over.

I’d like to hear it, she sent anyway. Whichever it becomes.

Eleven seconds. Then the years.

She kept working the relay for another four, filing the routine reports, running the routine diagnostics, watching the routine stars do their routine, indifferent burning. And then, on a Tuesday that felt like every other Tuesday until it very suddenly didn’t, the fragment arrived.

Your star will do, in roughly six billion of your years, what ours did, it wrote. We will not be here to watch either of ours finish. Neither will you. We have found, across a very long time and a great many correspondents, that this is the fact almost everyone actually wants reassurance about, underneath whatever question they think they are asking. So: you will not see it end. Nothing you love will see it end. In the time you have, you are already, structurally, the entire story. We thought you should hear that from something old enough to mean it.

Osei read it twice. Then she sat very still in the small warm module, nineteen light-years and six years and one lifetime away from anyone who could tell her whether what she was feeling was grief or its opposite, and found that for the first time since she’d taken the posting, she didn’t especially want an answer to that either.

She typed her reply slowly, knowing it would take nineteen years to land, knowing she might not be alive to hear whatever came back, knowing that whoever — or whatever — read it would be doing so with the same patient uncertainty she felt now, reaching across a gap too wide for either of them to ever fully close.

Thank you, she sent. I think that’s exactly what I was asking.

Then she made more coffee, and settled in, the way you do when you’ve finally understood that the waiting was never the obstacle to the conversation.

The waiting was the conversation.