15 The Swarm
Dresden-Nord, April 2031; Geneva · October 2030 – Monday, 18 August 2031.
The trench ran two hundred meters along the east fence, between the chiller yard and the road, and Klaus Weber walked the length of it on his bad knee because Arndt wouldn’t come up.
“Supply’s ninety-one degrees,” Arndt said from the bottom. He had two clamp-on meters strapped to the new pipe, one each side of the tie-in, and a laptop balanced on a sandbag. “Return fifty-eight. That’s with us at sixty percent.”
“And at full load?”
“At full load we make three hundred megawatts of heat and throw it at the sky.” He tipped his chin at the cooling towers, steaming in the April cold. “In winter they can take nearly all of it.”
Hoffmann from the city utility stood on the far lip in a hi-vis vest over a good wool coat. She had the contract in a plastic sleeve under her arm and hadn’t looked at it once.
“Summer is another conversation,” she said. “But in January you’re heating half of Klotzsche.”
“You offered this to the other two.”
“All three fabs, the same terms. They took base load only.” She shrugged. “They don’t like being somebody’s boiler. If a line goes down in February, people are cold, and then it’s in the Sächsische Zeitung.”
“Our lines don’t go down.”
“That’s what I told my director.”
Weber had grown up near Pirna in a flat heated by a lignite plant upriver, and he could still smell it in the stairwell when he thought about it. Nobody in Klotzsche was going to smell this. He signed in the site trailer standing up, because the folding chairs were worse for the knee.
Back in his office the quarterly idle list was waiting, forty lines from finance on tools and floor space nobody was using. Near the bottom was the old radiation-hardened line, eight-inch, kept warm for satellite customers who came every three or four years and always in a hurry. Finance wanted the floor. He wrote leave it in the margin, initialed it, and moved on to the nitrogen contract.
By the second week of October the consultation had a lease, a building on the Route de Ferney with a cafeteria and a car park, and a name nobody used. The Standing Consultative Mechanism met in a room with the same nine flags it had had in Vienna and the same quiet Uruguayan chair, and by Christmas everyone called it the council.
Dana sat behind the American chairs again, with a laptop and a microphone she wasn’t supposed to need.
The second batch had left on 8 October. Lookout saw it the way it had seen the first. Forty-three of them. The first had been forty-one.
“Twenty-nine days,” the chair said when Dana gave the dates. “Is that the Moon?”
“No, ma’am. The Moon is 29.53. This is 29.0, to a few hours.”
The third batch on 6 November was forty-five. The fourth, 5 December, was forty-seven. They were all spheres, 3.85 m across, and every batch was a few spheres bigger than the one before. Dana ran the ratio after the fourth and got 1.05 each time, near enough. Five percent every twenty-nine days doubled in a little over a year.
Priya’s sheet came in a week before Christmas, from Goddard, with a two-line note asking whether Dana thought it was anything. Priya had taken her inbound movers, the ones braking in from the belt, and summed their counts in the month before each batch, scaled up by the one-in-eight she actually recovered. Then she had lined each month up against the batch that followed it. Four points. The months with the most traffic coming back from the belt came before the biggest batches, and the slope was clean. Four points was a slope a first-year could draw through anything. Dana wrote back that it was something, and asked her to keep it going.
On 3 January there were fifty. On the sheet the fifth point fell where the first four said it would.
Kessler put the sheet up in the January session, credited to Goddard, Priya’s name in the corner. He had been seconded from Darmstadt for the council and sat at the ESA chair in his reading glasses.
“The movers go out to the belt,” he said. “They come back heavier. A month later it sends out more spheres than the month before. It is spending what the movers bring back. On spheres, and on more movers.” He tapped the slope. “Every batch, a few more.”
In February Kessler’s heat curve went flat.
The last four months sat on a level line inside their error bars, and he showed it without a word of preamble, then put up a single number.
“To hold that surface there against what it radiates, something inside is making between ten and thirty gigawatts. Germany on a quiet Sunday night is perhaps forty.”
“Making things makes heat,” the general said.
He was a lieutenant general in the Russian delegation who always wore civilian suits, dark and well cut, and who had spoken perhaps four times since Vienna. He didn’t elaborate. The chair let it stand for a moment and called the next item.
Dana took the train north with Kessler on the last Friday of February, Geneva to Basel and then the ICE down the Rhine. He had a ticket to Darmstadt; she had a flight out of Frankfurt on Sunday and no reason to take the train except that he’d asked.
He talked about the carrier first, before Lausanne. “It is a protected band. Nobody is allowed to transmit there.” He had a paper cup of tea balanced on the fold-down tray and kept steadying it. “If it wanted to talk to governments, it would choose a frequency where governments have dishes. It chose one where astronomers have them.”
“Or it doesn’t care who listens.”
“Then it would choose a band with less noise in it, and that one is not so quiet.” He shrugged. “Green Bank hears a tone. I hear a tone.”
Somewhere after Basel she asked him about the batches, about the word he’d used in January.
“I said spending. That was wrong.” He turned his cup a quarter turn. “Spending is when you have a fortune and it goes down. Here nothing goes down. The movers bring back mass, it sends out spheres and more movers, the movers bring back more. It is trading.”
“With whom?”
“With the belt. With itself.” He looked out at the river, gray and wide and full of barges. “Your Priya’s slope says that.”
She asked about the heat, and he was more careful.
“It is a good curve,” he said, “if the surface is the same surface.”
She had the Hubble numbers in her head, two percent a month at first and fainter ever since, and a cooling metal face that didn’t darken. She looked at the barges. He didn’t ask.
At Darmstadt he stood up and got his bag down and stood in the aisle a moment with it.
“Next month,” he said.
“Twenty-nine days.”
The first batch came in out of the evening twilight in the second week of April, the way JPL had said it would in September. The ground networks’ tracks said it was braking, hard and evenly, and it would go on braking for weeks. From the ground it was nothing, a scatter of points too faint for most telescopes low in the west after sunset, except that every few minutes one of the spheres turned its polished face to the Sun at the right angle and flashed for tens of seconds, bright enough for a backyard camera.
The forty-three of the second batch were a month behind them, fainter, higher in the dark.
Earl Voss had the first count on his forum before anyone official said a number.
By the weekend the press had settled on the Swarm. Half the replies under Earl’s post said he was faking it, and some of those were from people with telescopes.
On Tuesday, 22 July, the council met at ten. By then the first four batches were in.
They hadn’t come down. They had braked into long, eccentric orbits around Earth, perigees near 30,000 km, apogees out near 100,000, and they hung there on a shell that was filling up from the bottom. The count depended on whose network you believed. Space Force said 176, ESA 181, the Russians 183. Dana’s own number, from the public tracks, was 178 with a handful she couldn’t separate. The sum of the first four batches was 176.
The man with the legal pad had come out from Washington for the session. He sat in the American chair this time, and when the chair gave him the floor he spoke for five minutes without looking at it.
“Whatever its purpose,” he said, “we now have approximately one hundred and eighty objects of roughly 235 tonnes each, iron, in orbits around this planet, delivered by a party that has not communicated with anyone. A new delivery arrives every month, each larger than the last. My government regards this as a stockpile, and it will plan on that basis.”
Dana pressed her button before she’d decided to. The red light came on at her seat. The chair looked over her glasses at it, and at the American chair in front of it, and gave her the floor anyway.
“A stockpile is a pile,” Dana said. “This is spaced out.”
Somebody behind her stopped typing.
“I’ve fit every orbit we have. The perigees are all within a few thousand kilometers of each other, and the orientations are spread evenly, like slots. When a new sphere brakes in, it doesn’t go near the ones already there. It goes into a gap. Every one of the second batch went into a gap the first batch left.” She heard her own voice through the room speakers and kept going. “You don’t get that by dumping things in orbit. Somebody is placing them.”
He didn’t turn round.
Kessler had his light on next. “Each of them has one face that is polished. We see it only when it flashes, when the face is between the Sun and us at the right angle.” He took off his glasses. “A polished face is not decoration. It is something you point.”
“Point at what?” the Japanese delegate said.
“At us. At the Sun. At each other. I do not know.”
“A thing you place and point is a thing you aim,” the general said. “In my profession that is not a difficult word.”
“In mine it isn’t either,” the man from Washington said.
“They spent seven months braking so they wouldn’t come down,” Dana said. The chair hadn’t given her the floor again, and nobody stopped her. “If you wanted to drop iron on someone, you wouldn’t stop first.”
“235 tonnes at 11 kilometers a second is three kilotons,” the general said. “Each. It does not have to be dropped today.”
“Or it’s a telescope,” the Japanese delegate said. “A hundred and eighty mirrors around one planet. Who builds that to attack someone? You build that to look.”
“Dr. Kessler, in Vienna you said it was parked to see,” the chair said.
“I said that,” Kessler agreed. “I did not say what it would do with what it saw.”
Lin Wen, at the Chinese chair, hadn’t pressed her button all morning and didn’t now. The chair took the item off the public summary, to be revisited in September, and moved on to the budget for the building.
At the break the American stood, collected his pad, and went out by the far aisle, so he never had to pass behind her.
Late in July the Ontario amateurs who had counted the second batch posted a few small, faint objects near the geostationary belt that didn’t glint and didn’t tumble, and the trackers filed them as debris.
On Monday, 18 August, they posted another plot. Dana had it on her phone before the morning session: a single sphere on its long orbit, and a few kilometers behind it, faint, a second track, matched to a Chinese object launched in June and catalogued as a rocket body. For seven nights the gap between them hadn’t changed. Over the weekend Beijing had said it was debris.
She found Lin by the coffee machines on the ground floor and held out the phone without saying anything.
Lin took it, enlarged the plot with two fingers, looked at the gap between the tracks, and handed it back.
“Your briefing is at two,” she said. “You should eat something first.”