On the third evening, Isobel arrived with the observations from both previous nights and very little interest in the programme she had originally come to complete.
She had spent the afternoon measuring the faint object’s position against the surrounding stars. At first, the work had been a way of deciding whether to devote any more time to it. By the time she stopped, she had checked several measurements twice and asked another astronomer to look at them without telling him what she thought.
He had found no obvious mistake. That had been reassuring for approximately a minute. Ernesto Fuentes was waiting beside the controls when she entered.
“I haven’t touched anything.”
“Thank you.”
“I thought we might be past the stage where that was a criticism.”
She put her papers on the desk and showed him the field she wanted. For the first time since she had arrived, it was the one the telescope had been choosing for itself.
He looked at her.
“This one?”
“Yes.”
He entered the position. The telescope moved, settled and reported that it had arrived.
The first image appeared exactly where it should.
Isobel pulled out her chair.
They worked for more than an hour before she explained what was troubling her.
The new measurements fitted the earlier ones. She had hoped for a discrepancy large enough to send her back through the calculations, something she could blame on the equipment or her own fatigue. Instead, each exposure made the motion easier to follow.
The object had not appeared where she expected a known one to be. Nor had the preliminary calculations given her an explanation she liked.
She spread two pages beside the keyboard and showed Ernesto the range of paths she was examining. There was still too little information to settle on a reliable orbit, but some of the possibilities brought the object uncomfortably close to Earth.
He studied the pages for a while.
“How close?”
“I don’t know yet.”
She disliked the answer, but it was the only honest one. They could not establish a collision from what they had, or even say that the most worrying possibilities were the most likely. They had enough to ask other people to look, and enough to make further observations urgent.
He glanced towards the current image.
“That little point?”
“Yes.”
It seemed inadequate to both of them.
There was another page she had not yet shown him. Isobel placed it beside the orbital calculations. She had used the measured brightness to examine a range of possible sizes, allowing for the uncertainties in distance and how much sunlight the object might reflect. She had expected the assumptions to matter. What troubled her was how little comfort even the more favourable ones offered.
Ernesto followed her pencil down the figures.
“How big are we talking about?”
She had avoided giving the answer a name while she worked. It had been easier to keep it among the numbers.
“If these are right, it’s a planet killer.”
He looked at her, waiting for something that would make the words less absolute.
“That doesn’t mean it will hit us,” she said. “We haven’t established that. But if it did, we wouldn’t be talking about damage to one country.”
He turned back to the image. The point remained small and faint, unchanged by anything she had told him.
Isobel gathered the measurements into order. She would send the positions and exposure times for independent checking, together with an account of the telescope fault. The images were usable, but she wanted another instrument on the object as soon as possible.
For two nights she had resented the work she was being prevented from doing. Now she looked at the familiar field and wondered what they would have missed if the telescope had behaved.
Ernesto began examining the control records while the next exposure ran.
Isobel had stopped asking him to fix the pointing problem. She wanted to understand it.
They compared the position they had requested with the one the instrument had actually held, working backwards through the previous nights. There were periods of ordinary behaviour between the unexplained movements, and no single incorrect instruction that accounted for all of them.
He opened the relevant control files.
Isobel drew her chair closer.
Most of what appeared on the screen meant little to her without his explanation. She recognised the fields containing positions and timing information, and could follow enough of the structure to see where one sequence ended and another began.
Farther down, a block of numbers caught her attention.
“Go back.”
He returned to the previous part of the file.
The entries were arranged in pairs. There were more of them than she would have expected for a short list of targets, and they lacked the descriptions that accompanied the observing instructions.
She pointed to the first few.
“What are those?”
He read through the lines above them, then scrolled down to where the block ended.
“I don’t know.”
“Positions?”
“They could be.”
He searched for a reference to the list elsewhere in the file. While he worked, Isobel copied several pairs into her notebook. At first she thought they might describe another field, perhaps one that had been entered during an earlier observing run and somehow retained.
But the repetitions bothered her. Several values returned at regular intervals, and groups of points occupied almost the same small areas.
She asked him to print the block.
Her first plot looked like a star field she did not recognise.
There was a central group and several smaller groups around it, with more points scattered beyond them. She checked the scale, then the order in which she had copied the numbers. Nothing obvious emerged.
Ernesto left her to it while he checked the latest exposure.
Isobel continued adding points. As the page filled, the scattered marks began to form an outer boundary. Within it, the smaller groups resolved into shapes that were too regular to be accidental.
She reached for a clean sheet.
This time she worked through the entire list, keeping the scale consistent. She drew lightly between neighbouring points where the spacing suggested a continuous edge. The outline was irregular but deliberate, enclosing one shape in the centre and five arranged around it.
She stopped halfway through joining the last group. Ernesto noticed the silence and turned. Isobel moved the page towards him.
He looked at it, then at the columns of numbers beside her hand.
“You got that from the file?”
She nodded.
He took the printout and began comparing the entries with the drawing. She watched him find the central group, then one of the smaller ones. When he looked back at the page, she knew he had reached the same difficulty.
These were not positions in the sky.
Someone had put a picture into the telescope’s control files.
Isobel finished the last edge. It resembled a small ornament or a piece of jewellery, with a larger stone at its centre and five smaller ones around it. She could not remember seeing anything like it, but the shape had a precision that made her own tentative pencil lines seem inadequate.
Ernesto returned to the screen.
Below the number block was a short section they had passed over while looking for an explanation of the coordinates. He brought it into view, and Isobel leaned forward.
Among the surrounding notation were two sentences.
Connection requires the six, bearing their own. Creation strongest at this site.
Neither spoke for some time.
Isobel read the line again. It remained on the screen with the same ordinary appearance as the instructions above it.
Ernesto went back through the file, looking for anything that might identify who had added the material. He found no explanation he trusted.
“Could it have been here before?” she asked.
“I’ll need to compare the copies.”
He began doing so. Isobel sat with the plotted image in front of her, trying to separate what they knew from what she was beginning to suspect.
The telescope had repeatedly brought them back to a faint object she would otherwise never have recorded. It had held that object within a usable field while accepting instructions that should have taken it elsewhere. Now, in the files involved in controlling those movements, they had found an image and a request.
She thought of the remark she had made the previous night.
A ghost in the system.
It no longer seemed a particularly good joke.
She drew the observing log towards her and turned back to the first night. Every failure had been recorded as lost time or an incorrect movement. She could trace them in her own handwriting.
Perhaps she had been recording something else.
Ernesto returned to her side.
“I can’t tell you who put it there.”
“Keep everything.”
He nodded.
“The files, the old copies, the printouts. I don’t want us trying to remember which version we looked at.”
He had already begun setting them aside.
Isobel looked once more at the message. Six what? The drawing contained six stones, but “bearing their own” seemed to refer to something beyond the image. And creation was an odd word to find in a telescope’s control file. She could not tell whether it described a process, a capability or something she had misunderstood entirely.
“This site,” Ernesto said quietly.
She glanced around the room. The familiar equipment offered no explanation. She put the page beside the measurements. Those, at least, she knew how to send.
By the time the next exposure was complete, she had prepared a brief account of the observations.
She kept the language restrained. The object required prompt follow-up. The preliminary results needed checking. She gave the dates, positions and times, included her estimated range of sizes and the assumptions behind it, and described the instrument’s unusual behaviour without trying to explain its cause. She left the phrase she had used with Ernesto out of the account. The calculations were alarming enough without it.
The additional pages were more difficult.
She attached the plotted image and the relevant extract from the control file, explaining how they had found them. It felt absurd to include a drawing that resembled jewellery with material intended for an astronomer, but leaving it out would mean deciding, without evidence, that it had nothing to do with the rest.
She read the whole account before sending it.
Ernesto checked the exposure times against the log. Then he stood beside her while she transmitted the material to Professor Alejandro Valdés at the Institute of Astronomy, University of Cambridge. She knew him through previous research correspondence; he was careful with uncertain results and had agreed to arrange an independent examination. Tonight, she needed someone who would check every assumption before accepting her conclusions.
When it was done, Isobel remained at the desk.
She had come to La Silla with three nights to complete a programme she understood. Her final night was nearly over, and the most important work lay on pages she had never expected to write.
On the screen, the faint point had moved again.
She asked for another exposure.
The material reached Professor Valdés in Cambridge later that morning.
He began with the measurements. The request was unusual, but the observations were clear enough to warrant follow-up. He made a note to contact Isobel, then continued through the account of the pointing fault.
At the final pages, he stopped.
The drawing was imperfect. Some edges had been traced more confidently than others, and one of the smaller shapes had been corrected. Yet the arrangement was unmistakable.
He had seen it before.
He moved the scientific pages into one pile and kept the image beside its accompanying extract. For several minutes, he studied them without making another note.
Then he telephoned a number he had not used for some time.
The conversation was brief. He confirmed where the material had come from and asked where he should send a copy.
Before returning to the orbital measurements, he faxed the pages to Istanbul.
Isobel’s name and La Silla’s address remained at the top.