The speakers clicked off.
Nobody moved. The control room was full of the small sounds it always made, the hum of the computers, the tick of a cooling fan, the wind against the walls, and underneath all of it, nothing. No lullaby. No voice. Just the room, holding its breath.
Mira stared at the monitor. The words were still there on the screen, the computer's calm type, as if nothing strange had happened at all.
SIGNAL 5 OF 2 RECEIVED. ORIGIN: VELA DEEP ARRAY.
"Play it again," she said.
Renata didn't move. "Mira. You heard it."
"Play it again."
Renata's hand hovered over the button. Then she pressed it, and the voice came back, her own voice, tired and awake and afraid, speaking words she had not said yet.
"Don't answer the next one. Whatever you do, don't answer the next one."
This time Mira listened the way she had listened to the four letters, not for the meaning but for the shape. There were breaths between the words. Small ones, uneven ones, the kind a person takes when they are trying not to panic. It was her voice. It was really her voice. Not the learning voice that had spelled her name. Not the older voice from 2049, worn smooth by twenty-three years. Her voice, right now, from a throat that had been awake for twenty hours and was running on coffee and fear.
"That's me," she said. "That's me right now. Not later. Not older. Me, tonight."
"Which means you say it soon," Renata said. "You haven't said it yet. You say it soon, and the relay carries it back to you, and you hear it before you say it. That's how this works. That's how all of it works."
Mira shook her head. "No. The other messages came from the Meridian, from far away, from people who had already spoken. This one came from here. From this room. From a transmission I haven't made yet. Which means at some point, I sit down at this console and I record that warning, and I send it, and the relay carries it back."
"So you do say it," Renata said. "You do warn yourself. Which means whatever happens next, you survive long enough to send it."
She stood up, holding the edge of the desk to steady herself. The sky outside the window was pale now, the first real light of morning coming up over the red rock.
"What is the next one?" Renata asked. "That's the question. The warning says don't answer the next one. The next one after what? After this one? After the five we've already had?"
Mira thought about the count. Nine, seven, five, three, one. The lullaby, burning down by twos with every message. Every message they sent, every message they answered.
"The lullaby counts our messages," she said slowly. "Every time we answer, it counts down. Nine, seven, five, three, one. And now it's at one. So the next message is zero."
"What's at zero?" Renata asked.
"I don't know. Maybe nothing. Maybe the relay goes quiet, like the log said. Maybe that's the end of it. The relay carries my voice until 2049, and then it stops, and then I stop, and that's the whole story."
"Or maybe zero is the thing the warning is about," Renata said. "Maybe when it hits zero, something answers instead of us. Something that isn't us."
Mira looked at the speakers. They were silent now, the little green light steady, waiting. The dishes overhead were still turning, tracking the satellite that should not have been there. They could shut down the uplink, pull the plug, go dark. But they could not stop listening. The dishes were built to listen. The relay was built to carry. And the next signal, whatever it was, was already on its way.
"We don't answer," she said. "That's the decision. We don't answer the next one. Whatever it is, whatever it says, whatever it sounds like, we don't answer it."
"And if it's Lian?" Renata asked.
The question hung in the room.
Lian. Her daughter, or her daughter-to-be, the girl who had spoken to her from the Meridian, from a ship that was coming home because Mira had answered. Lian, who had told her about the choice. Answer, and the Meridian comes home. Don't answer, and Lian is never born.
"I don't know," Mira said. "I don't know what the next one is. The warning didn't say. It just said don't answer. It didn't say who was sending it. It didn't say what it would cost."
"Then let's think about what it costs," Renata said, and her voice was steady now, the way it got steady when there was a problem to solve and feelings had to wait. "If the next signal is from the Meridian, and we don't answer, what happens? The ship is already on its way. It's already coming home. Does it need us to keep talking to it? Does it need the relay to keep carrying our voices? Or is it already on a course it can't change, and our silence doesn't matter?"
"I don't know," Mira said again. "The captain's log didn't say. Lian didn't say. My older self didn't say. Nobody told us how the ship works. They just told us to answer."
"And if the next signal isn't from the Meridian?" Renata said. "If it's from something else? If it's the thing that's been counting us down, and it wants us to answer because answering is how it gets in?"
Mira opened her mouth. Then she closed it. Because she didn't know. The voice had her breaths, her tiredness, her fear. It sounded like her. But the four letters had sounded like a voice learning, and the lullaby had sounded like a song, and both of those had turned out to be something else.
"The log," she said at last. "Check the log. If the relay carries everything, then the log should have an entry for this signal. Signal five. And it should have an entry for the next one, if the next one is already written."
Renata turned back to the keyboard. Her fingers moved fast, too fast, the way they did when she was trying not to think about what she was doing. The log unfolded on the screen again, the long list of entries, her name running down the years, and Renata scrolled to the bottom, past 2049, past the final transmission, past the note that said she had done well.
There was a new entry. It had not been there an hour ago. Mira was sure of it. She had read the bottom of the list herself, and there had been nothing below the final transmission except the note about the lullaby.
The new entry was stamped with tomorrow's date.
VELA DEEP ARRAY — MIRA SOLBERG — CARRIED.
And beneath it, in the small type, a note in the Meridian cant.
Renata read it out loud, and her voice shook. "It says, she answered."
Mira stared at the screen. "She answered," she repeated. "That's what it says? She answered?"
"That's what it says."
"She answered what?"
"I don't know. It doesn't say. It just says she answered."
The log was writing her future, and her future said she answered. Not that she didn't. Not that she stayed silent. She answered.
"Unless the warning is about the next signal, not this one," Renata said. "Listen to the words. Don't answer the next one. Not this one. The next one. The one after this. Which means this warning is the last one that's safe. This is the line."
"Here's what we do," she said at last, and her voice sounded steadier than she felt. "We shut down the uplink. Not the dishes, not the listening. Just the transmitting. We don't send anything. Not a reply, not a warning, not a single word. We listen, and we log, and we don't answer. And if the next signal comes, and it's Lian, and she's asking for us, we listen to it, and we don't answer it, and we live with that."
"And the Meridian?" Renata asked. "Four thousand people, coming home. They need the relay. If we go silent, does the relay go silent? Does the ship lose its way?"
"The relay doesn't need us to talk," Mira said. "It needs us to listen. It's been carrying voices for years without us knowing. It carried the captain's log. It carried Lian. It carried my older self. It doesn't need my permission. It just needs the dishes pointed at the sky. And we can do that without speaking."
Renata nodded, slowly. "Okay. We shut down the uplink. But Mira, if the log is right, if it says you answered, then shutting down the uplink doesn't stop it. The log says it happened. Tomorrow's date. She answered. So either the log is wrong, or we turn the uplink back on, or —"
"Or the relay answers for us," Mira said.
The words came out before she had finished thinking them, and as soon as she said them, she knew they were true, or true enough to be afraid of. The relay carried voices. It didn't care whose. And if the next signal arrived, and the dishes were listening, and the relay was awake, what was to stop it from taking the voice it had learned, her voice, and speaking back, in her name, without her ever opening her mouth?
"We need to check the transmitter," Renata said, and she was already moving, already reaching for the panel on the far wall, the one that controlled the uplink. "We need to make sure it's actually off. Not on standby. Off."
She hit the switch. The panel lights went dark, one by one, and the hum in the room changed, very slightly, the way a room changes when something that has always been running stops running.
"Off," Renata said. "The uplink is off. We can't transmit. Nobody can transmit. Not us, not the relay, not anybody. The dishes can only listen now."
Mira nodded. She felt something loosen in her chest, just a little, the way you feel when you've done the one thing you could do, even if it isn't enough.
They sat down. They waited. The computers hummed. The dishes turned overhead. The morning light grew stronger, and the desert outside went from pale to gold, and the control room was quiet, and the speakers were silent, and for a while, for almost an hour, nothing happened at all.
And then the monitor flashed, and a new line appeared on the screen, in the computer's calm, unhurried type.
SIGNAL 6 OF 2 RECEIVED. ORIGIN: VELA DEEP ARRAY. AWAITING PLAYBACK.
Renata's hand went to her mouth. "That's us. That's our station. Again. But we didn't send anything. The uplink is off. We didn't send anything."
"I know," Mira said. "I know we didn't."
"Then who sent it?"
Mira looked at the speakers. The little green light was steady. The waveform on the monitor was flat. And then, very slowly, the flat line began to move, the way a line moves when a voice is about to speak.
The lullaby came first. Not underneath the voice this time. On its own. Clear and close, the low line like a tide, and above it the high line, starting the same phrase over and over.
Mira counted. She couldn't help it. She counted the way you count something you are afraid of.
One. That was all. One repeat. And then it stopped.
And then the transmitter panel, the one Renata had just switched off, lit up on its own. The lights came back, one by one, warm and amber, and the hum in the room changed again, and the speakers clicked, and a voice came out of them.
Her voice. Her own voice, exactly as she sounded right now, tired and awake and afraid.
And it was answering.