Pandora's Star

ONE

The star vanished from the center of the telescope’s image in less time than a single human heartbeat. There was no mistake, Dudley Bose was looking right at it when it happened. He blinked in surprise, drawing back from the eyepiece. “That’s not right,” he muttered.

He shivered slightly in reaction to the cold air around him, slapping gloved hands against his arms. His wife, Wendy, had insisted he wrap up well against the night, and he’d dutifully left the house in a thick woolen coat and sturdy hiking trousers. As always when the sun fell below Gralmond’s horizon, any warmth in the planet’s thinner-than-average atmosphere dissipated almost immediately. With the telescope housing open to the elements at two o’clock in the morning, the temperature had dropped enough to turn his every breath into a stream of gray mist.

Dudley shook the fatigue from his head, and leaned back into the eyepiece. The starfield pattern was the same—there had been no slippage in the telescope’s alignment—but Dyson Alpha was still missing. “It couldn’t be that fast,” he said.

He’d been observing the Dyson Pair for fourteen months now, searching for the first clues of the envelopment that would so dramatically alter the emission spectrum. Until tonight there had been no change to the tiny yellow speck of light twelve hundred forty light-years away from Gralmond that was Dyson Alpha.

He’d known there would be a change; it was the astronomy department at Oxford University back on Earth that had first noticed the anomoly during a routine sky scan back in 2170, two hundred and ten years ago. Since the previous scan twenty years earlier, two stars, a K-type and an M-type three years apart, had changed their emission spectrum completely to nonvisible infrared. For a few brief months the discovery had caused some excited debate among the remnants of the astronomy fraternity about how they could decay into red giants so quickly, and the extraordinary coincidence of two stellar neighbors doing so simultaneously. Then a newly settled planet fifty light-years farther out from Earth reported that the pair were still visible in their original spectrum. Working back across the distance, checking the spectrum at various distances from Earth, allowed astronomers to work out that the change to both stars had occurred over a period of approximately seven or eight years.

Given that amount of time, the nature of the change ceased to become a question of astronomy; stars of that category took a great deal longer to transform into red giants. Their emission hadn’t changed due to any natural stellar process; it was the direct result of technological intervention on the grandest possible scale.

Somebody had built a solid shell around each star. It was a feat whose scale was rivaled only by its time frame. Eight years was astonishingly swift to fabricate such a gigantic structure, and this advanced civilization had apparently built two at the same time. Even so, the concept wasn’t entirely new to the human race.

In the twenty-first century, a physicist named Freeman Dyson had postulated that the artifacts of a technologically advanced civilization would ultimately surround their star in order to utilize all of its energy. Now someone had turned his ancient hypothesis into reality. It was inevitable that the two stars would be formally christened the Dyson Pair.

Speculative papers were written after the Oxford announcement, and theoretical studies performed into how to dismantle Jovian-size planets to produce such a shell. But there was no real urgency connected to the discovery. The human race had already encountered several sentient alien species, all of them reassuringly harmless; and the Intersolar Commonwealth was expanding steadily. It would be a matter of only a few centuries until a wormhole was opened to the Dyson Pair. Any lingering questions about their construction could be answered then by the aliens themselves.

Now he’d seen that the envelopment was instantaneous, Dudley was left with a whole new set of very uncomfortable questions about the composition of the shell structure. An eight-year construction period for any solid shell that size had been assessed as remarkable, but obviously achievable. When he’d begun the observation he’d expected to note a year-by-year eclipse of the star’s light as more and more segments were produced and locked into place. This changed everything. To appear so abruptly, the shell couldn’t be solid. It had to be some kind of force field. Why would anyone surround a star with a force field?

“Are we recording?” he asked his e-butler.

“We are not,” the e-butler replied. “No electronic sensors are currently active at the telescope focus.” The voice was slightly thin, treble-boosted; a tone that had been getting worse over the last few years. Dudley suspected the OCtattoo on his ear was starting to degenerate; organic circuitry was always susceptible to antibody attack, and his was over twenty-five years old. Not that the glittery scarlet and turquoise spiral on his skin had changed. A classic spree of youthful dynamism after his last rejuvenation had made him choose a visible pattern, stylish and chic in those days. Now it was rather embarrassing for a middle-aged professor to sport around the campus. He should have had the old pattern erased and replaced it with something more discreet; but somehow he’d never gotten around to it, despite his wife’s repeated requests.

“Damnit,” Dudley grunted bitterly. But the idea of his e-butler taking the initiative had been a pretty forlorn hope. Dyson Alpha had risen only forty minutes earlier. Dudley had been setting up the observation, performing his standard final verification—an essential task, thanks to the poorly maintained mechanical systems that orientated the telescope. He never ordered the sensor activation until the checks were complete. That prissy routine might have just cost him the entire observation project.

Dudley went back for another look. The little star was still stubbornly absent in the visual spectrum. “Bring the sensors on-line now, will you please. I need to have some sort of record of tonight.”

“Recording now,” his e-butler said. “The sensors could benefit from recalibrating, the entire image is considerably short of optimum.”

“Yeah, I’ll get on to it,” Dudley replied absently. The state of the sensors was a hardware problem; one that he ought to assign to his students (all three of them). Along with a hundred other tasks, he thought wearily.

He pushed back from the telescope, and used his feet to propel the black leather office chair across the bare concrete floor of the observatory. The rattling noise from its old castors echoed thinly around the cavernous interior. There was enough vacant space for a host of sophisticated ancillary systems, which could bring the observatory up to near-professional standards; it could even house a larger telescope. But the Gralmond university lacked the funds for such an upgrade, and had so far failed to secure any commercial sponsorship from CST—Compression Space Transport, the only company truly interested in such matters. The astronomy department survived on a collection of meager government grants, and a few endowments from pure-science foundations. Even an Earth-based educational charity made an annual donation.

Beside the door was the long wooden bench that served as a de facto office for the whole department. It was covered with banks of aging, secondhand electronic equipment and hi-rez display portals. Dudley’s briefcase was also there, containing his late-night snacks and a flask of tea.

He opened the case and started munching on a chocolate cookie as the sensor images swam up into the display portals. “Put the infrared on the primary display,” he told the e-butler.

Holographic speckles in the large main portal shoaled into a false color image of the starfield, centered around the Dyson Pair. Dyson Alpha was now emitting a faint infrared signature. Slightly to one side and two light-years farther away, Dyson Beta continued to shine normally in its M-type spectrum.

“So that really was the envelopment event,” Dudley mused. It would be two years before anyone could prove whether the same thing had happened simultaneously at Dyson Beta. At least people would have to acknowledge that the Dyson Alpha event occurred in under twenty-three hours—the time since his last recorded observation. It was a start, but a bad one. After all, he’d just witnessed something utterly astounding. But without a recording to back him up, his report was likely to generate only disbelief, and a mountainous struggle to maintain his already none-too-high reputation.

Dudley was ninety-two, in his second life, and fast approaching time for another rejuvenation. Despite his body having the physical age of a standard fifty-year-old, the prospect of a long, degrading campaign within academia was one he regarded with dread. For a supposedly advanced civilization, the Intersolar Commonwealth could be appallingly backward at times, not to mention cruel.

Maybe it won’t be that bad, he told himself. The lie was comforting enough to get him through the rest of the night’s shift.

The Carlton AllLander drove Dudley home just after dawn. Like the astronomer, the vehicle was old and worn, but perfectly capable of doing its job. It had a cheap diesel engine, common enough on a semifrontier world like Gralmond, although its drive array was a thoroughly modern photo- neural processor. With its high suspension and deep-tread tires it could plow along the dirt track to the observatory in all weather and seasons, including the meter-deep snow of Gralmond’s winters.

This morning all it had to surmount was a light drizzle and a thin slick of mud on the track. The observatory was situated on the high moorland ninety kilometers to the east of Leonida City, the planet’s capital. Not exactly a mountaintop perch, but it was the highest land within any reasonable distance, and unlikely ever to suffer from light pollution. It was forty minutes before the Carlton started to descend into the lower valleys where the main highway meandered along the base of the slopes. Only then were there any signs of human activity. A few farmsteads had been built in sheltered folds of the land where dense stretches of dark native evergreen cynomel trees occupied the ground above every stream and river. Grazing meadows had been established on the bleak hillsides, where animals shivered in the cold winds blowing down off the moorland.

All the while as the Carlton bobbed cautiously along the track, Dudley pondered how he could realistically break the news. Even a twenty-three-hour envelopment was a concept that the Commonwealth’s small fraternity of professional astronomers would dismiss out of hand. To claim it had happened in a split second would open him to complete ridicule, and invariably to an in-house status review from the university. As to the physicists and engineers who heard his claim . . . they’d gleefully contribute to the case against him.

Had he been at the start of his career he might have done it, achieving a degree of notoriety before finally proving himself right. The little man overcoming formidable odds, a semiheroic, or at least romantically poetic, figure. But now, taking such risks was too great. He needed another eight years of uninterrupted employment, even on the university’s demeaningly low salary, before his R&R pension was full; without that money there was no way he could pay for a rejuvenation. And who in the last decades of the twenty-fourth century was going to employ a discredited astronomer?

He stared out at the landscape beyond the vehicle’s windows, unconsciously stroking the OCtattoo on his ear. A wan light was illuminating the low undulating landscape of drab, damp cordgrass, revealing miserable-looking terrestrial cows and herds of the local bovine nygine. There must have been a horizon out there, but the bleak, gray sky made it hard to tell where it began. As vistas went, this had to be one of the most depressing of all the inhabited worlds.

Dudley closed his eyes and sighed. “And yet it moves,” he whispered.

As rebellions went, Dudley’s was fairly pitiful. He knew he couldn’t ignore what he’d seen out there among the eternal, unchanging constellations. Somewhat thankfully, he realized, he still had enough dignity left to make sure he didn’t take the easy burial option. Yet announcing the envelopment to the public would be the end of his own particular world. What others regarded as his essential meekness, he liked to think of as a caution that went with age. Similar to wisdom, really.

Old habits die hard, so he broke the problem down into stages, the way he always taught his students, and set about solving each one with as much logic as he could apply. Very simply, his overwhelming priority was to confirm the speed of envelopment. A wavefront of proof that was currently receding from Gralmond at the speed of light. And Gralmond was almost the farthest extent of the Commonwealth in this section of space. Almost, but not quite.

The Intersolar Commonwealth occupied a roughly spherical volume of space with Earth at the center, measuring four hundred light-years across. Gralmond was two hundred forty light-years from Earth, among the last of the second expansion phase planets to be settled. It didn’t require a great deal of calculation for Dudley to find that the next planet to witness the envelopment would be Tanyata, right on the edge of phase two space. Tanyata was even less developed than Gralmond—there was certainly no university yet—but a unisphere datasearch did find him a list of local amateur astronomers. There was one name on it.

Five months and three days after the evening he’d seen Dyson Alpha vanish, Dudley nervously waved good-bye to his wife as the Carlton pulled out of their driveway. She thought his trip to Tanyata was legitimate, sanctioned by the university. Even after eleven years of marriage, he didn’t have the courage to tell her the absolute truth. Or maybe it was that after five marriages he knew what to keep quiet about.