The Well Between Us

There is a black hole at the center of our sky, and on the far side of it someone has been trying, for four hundred of our years, to say six words.

We call the black hole the Well. Our astronomers found the others the way you notice a candle behind frosted glass — never the flame, only the smear of its light bent around the dark. Their world rides a tight orbit close to the Well, so close that its gravity leans on their hours and slows them. Down there, a single breath lasts one of our summers. One of their summers outlives our dynasties.

They speak to us in radio, and their radio must climb out of the Well before it can cross to us. Light that climbs out of a gravity well pays a toll: it stretches, it reddens, it slows. So a sentence they speak in an afternoon reaches us smeared across a decade, each syllable a long low tone a generation wide. And our answers, falling the other way, do the reverse — they brighten, they quicken, they compress. To them we must be a shrill and flickering people, whole lifetimes chittering past between two of their heartbeats.

The first thing we ever understood from them was a column of prime numbers. The second was the shape of the Well itself, drawn in the only ink we shared — the mathematics of falling light. After that, one hard grain at a time, came words.

I am a listener. My grandmother was a listener, and hers before her. We tend the great dish that faces the Well and we keep the ledger of what has arrived, syllable by syllable, across the lives it takes to arrive. It is not a profession so much as an inheritance, like tending a lighthouse whose beam takes a hundred years to sweep once around.

I tell you all this because our sun is dying.

Not in fire — in cold. It has been thinning for three centuries, a measure of its warmth surrendered each generation, so gently that the first people to record it were mocked, and the last to deny it froze. We have burned our forests and then our cities to stay warm. We have done the arithmetic of our own ending, and the arithmetic is not kind.

So we asked the ones below for help. It was the boldest sentence our species ever composed, and it took my grandmother's whole life to send, pushed down into the Well against the current of time: "Our star is failing. Is there room, in the slow country at the bottom of the Well, for us? May we come down?"

I have spent my life waiting for the answer.

Think of what our question became when it reached them. Falling into the Well, it sped and brightened and compressed, until four generations of careful, dwindling, freezing hope arrived at their instruments as a single frantic chirp — the sound, to them, of a whole civilization pleading and dying in less time than it takes to turn one's head. I have wondered, on the long cold nights at the dish, whether they even knew we were speaking slowly. Whether they understood there were people behind the chirp, and not merely a spark thrown off by their strange bright neighbors.

They understood. Of course they understood — they had counted our primes; they knew we were minds. And in their unhurried country they did what any decent people would do. They convened. They deliberated. They weighed the room they had against the strangers at their door. That deliberation, I have calculated, has lasted perhaps a year of their time.

It has so far lasted eleven of ours, and it is still arriving.

The answer began to reach us when I was a young woman. The first tone came in low and long, so stretched it took a season to complete, and when the mathematicians finished unwinding it they wept, because it was a word, and the word was "Come."

Come. One word, and it cost us a season to hear.

I am old now. The sea is ice to the horizon. There are not many of us left at the dish; the others have gone south to the last warm places, to die among family, and I do not blame them. But someone has to keep the ledger. Someone has to be here when the sentence finishes.

Because I have done the arithmetic, the way my grandmother taught me, and the arithmetic is this: the whole sentence — "Come down, there is room, you are welcome" — will take another sixty years to arrive. And our sun does not have sixty years of warmth left in it. Perhaps twenty. Perhaps ten.

The welcome will arrive to a frozen world. It will pour out of the Well, patient and kind and far too slow, and it will fall on an empty dish beside a black sea, and there will be no one left warm enough to hear that we were wanted.

I have known this for years. And still, last night, I did the only thing left worth doing.

I sent them a reply.

I pushed it down into the Well, against the current, so that it will fall and brighten and quicken until it reaches them — soon, for them; a matter of days. They are still deliberating down there; to them the welcome is a fresh and generous decision, its ink not yet dry. And into the middle of their kindness, out of their shrill flickering neighbors, a single bright spark will arrive.

They will not know what it is. They cannot; it will come too fast, one point of light where a civilization used to be. They will file it away as noise, or wonder at it for one of their long afternoons, and then forget.

But I know what it is, because I wrote it, and I will tell you, so that somewhere the meaning outlasts the sending.

It is two words. It took me all night to make them small enough and bright enough to fall.

"Thank you."

Let them receive it as a spark. Let them believe the strange fast people simply burned out, the way sparks do. It does not matter that they will read it wrong. What matters is that when the welcome finally reaches our silent shore, unheard, it will not be a kindness wasted on the dead.

It will be a kindness already answered — early, and across the Well, and in time.