Trouble in Elysium

A short story for Dr. Freeman's
SPAC 253, "Space Colonies"


"Strange that the home of the gods should look like a tin can in space," Nathan Loomis mused from his acceleration couch as the shuttle began its final matching acceleration with his destination.

"But it isn't the home of the gods, sir," replied the stewardess as she crept down the aisle, her Velcro sandals and the slight acceleration barely keeping her on the floor. "Olympus was the home of the gods in ancient Greek mythology. Elysium was the area in the afterlife where great heroes went to stay in peace and happiness for eternity. Elysium Station is the same way: after great industrial tycoons have made their fortunes and set up their companies, they can move here and just let the profits roll in, just putting a hand in when they're needed."

"Who built it? Surely it wasn't designed as a retirement home?"

"Not a retirement home -- more like a year-round resort. In the first flush of profits from organized asteroid mining made possible by the Harrison fusion drive, Ad Astra, Inc. built a huge research and development station, housing 100,000 people, both scientists and their families. The company planned to use the mining profits to expand into other fields in space manufacturing and development. But they miscalculated their opposition and went bankrupt. A group of corporate magnates took over the station, renamed it Elysium, remodelled the entire residential system into villas instead of apartments, and made it their home. From its site here in Earth geosynchronous orbit they can communicate with their corporate offices on Earth but still live in relative seclusion, closer to their actual interests in space."

The orbit-shuttle had turned off its fusion rockets, since interplanetary law prohibited the pilot from firing those fountains of radiation and hot plasma near any inhabited planet or space station. Instead it was igniting its small chemical reaction rockets (which just reacted the liquid hydrogen with oxygen instead of fusing it), lining up the hatch in its nose with the corresponding opening on the near axis of the station and spinning itself up to match Elysium's rotation rate of five degrees per second. Loomis was in a small compartment, holding couches for only about twenty people, with a hatch to the cargo holds beneath him, a door to the side opening to the cockpit, and an airlock iris valve at the bow above him. Loomis was the only passenger in the cabin other than some elderly matron on the other side of the compartment, slowly and meticulously filling out a crossword puzzle. Undoubtedly she had done this hundreds of times before, Loomis thought. She was just returning home, while Loomis was on his first trip outside near Earth orbit. His elderly grandmother, widow of an interplanetary freight magnate, had summoned him to Elysium after he graduated from law school so that she could look him over and perhaps "help him find a place in life."

He looked up at the viewscreen over their heads, its picture computer-corrected to eliminate the growing rotation of the shuttle that would have produced instant vertigo if the passengers had seen it directly. The pilot himself probably had his eyes averted, looking only at his instruments. The viewscreen was displaying a view from the bow camera as they approached Elysium. In space one lost all sense of scale, Nathan thought. In the screen one got no idea that the spinning cylinder of treated, reinforced mooncrete and glass was two and a half kilometers across and a little less than that long. As it spun he could see the huge window sections rotate by. Swung out from each was a large aluminum and mylar mirror that sent sunlight reflected from the large mirror on the other side of the station right into the station, where mirrors mounted on the central core would reflect it back to the living areas on the skin of the cylinder. That central core was one of the unusual facets of Elysium. The original designers had made the station a cylinder rather than a torus, yet to keep from wasting space in the middle they had mounted on the rotation axis a huge tube, running end to end in the station, housing low-g manufacturing apparatus, maintenance machinery, and so on, mostly run by industrial robots. The core also served as further radiation shielding for what cosmic rays slipped in past the mirrors and thick glass windows. Yet now it was unused, since costs prohibited removing it and the heavy equipment it contained. It was indeed as useless as if it had been air to the new owners.

He could see how the station was arranged from where the windows were. About a fourth of the length, the portion they were approaching, had no windows: that would be more unused industrial and laboratory section, containing the parts that needed full gravity or, at least, more than could be provided by the kilometer-across central core. Beyond that was a section making up about half the length of the station, holding the residential areas. Three full length windows made up about half its surface area, letting light through for the inhabitants. At the other end of the station, the windows were staggered from where they were in the residential area: there what had been land was window, and vice versa. This was the agricultural area, closed off to allow a carefully controlled atmosphere and temperature which would be uncomfortable for humans, but was marvellous for plants. Its windows were staggered so that it could use a separate set of window mirrors: light could be supplied to the plants at times when the main windows were closed to provide "night" for those living on the station. Beyond that was only the immense mirror that turned to follow the Sun in the colony's orbit with the Earth. At its edges were large black solar panels to collect power, further in were the mirrors that reflected sunlight into the station, and in the center was a microwave antenna that sent power to the receiver at the end of the core shaft. There was Elysium -- a strange enough prospect at first. But what would await him when he arrived inside?

With the aid of guidance lasers mounted on the edges of the dock and timed pulses on the radio, the guidance computer on the shuttle, specially programmed to take account of the strange Coriolis accelerations that acted on moving, rotating bodies, managed to guide the shuttle to a smooth, painless juncture with the station's receiving dock. The iris valve above them dilated open, revealing two small airlock chambers and the empty receiving area beyond that. No ladder? thought Nathan to himself, but then saw the old woman across the compartment release her couch's acceleration harness and just kick herself up through the air toward the corridor leading to the station's axis. Blushing at his ignorance of the theory of rotationally simulated gravity, Nathan followed suit. Entering the foyer at the end of the passage, he saw a middle-aged gentleman waiting for him, dressed in an archaic butler's costume, his coat-tails ludicrously floating behind him in the zero-gravity of the central core.

"Mr. Loomis, I presume?" he asked, "I am Phelps, your grandmother's butler, sent here to meet you. Would you follow me please?" Pushing off from the wall, he took a radial corridor from the reception area to a pair of elevator doors. The well-kept, lighted lift took the two along the core cylinder and through the unused industrial segment, where they entered a second elevator that took them from the axis along the wall between the section of the station to the residential area. Within the living area of Elysium was an unusual sight. As with most stations, the ground curved up toward the horizon, but unlike the typical torus, with its blank, chevron-shielding ceiling above leading in sunlight, the ceiling here mirrored the empty space outside, with the sun floating in the sharp, clear, starry night sky outside Earth's atmosphere. Since each mirrored section of the core shaft reflected light to two ground segments, however, the observer could see two suns in the sky. Across the chamber and above and behind the observer the walls of the residential area were painted black with white spots of stars to match the reflected view. Far to the left and right high stone walls blocked off access to the large windows that made up three sixths of the chamber's surface area, and also stopped any stray radiation that slipped through the windows slantwise. Between the walls, however, lay the villas of the rich and powerful. An access road carried small electric cars along the walls of the area, while the rest of the area consisted of large, well-landscaped villas separated from each other by large, ivy-covered walls of sculpted lunar rock. Each land-owner could alter his area as he saw fit, as long as the patch-work landscape was still pleasing to those farther along the cylinder who could see it before the core shaft artificially cut off their horizon. Cheap lunar soil could be shaped in whatever patterns the owner desired -- hills, plains, plateaus, terrain like an insane golf-course -- whatever the person had money and mind to do.

Phelps took Nathan to a little electric car parked by the elevator and drove it along the accessway until a gate, activated by a tiny transponder under the car's hood, opened for them. The butler drove in along a long driveway, and finally parked the car before what seemed to be a large, English mansion. The building's pillared portico and high windows were surrounded by ivy, and it had obviously been designed so that the sunlight, always falling at the same angle from the reflective mirrors, would strike the house at the best angle to show it off. Phelps led Nathan into the house, through a richly furnished foyer, full of plush furniture and expensive, carved wood, up carpeted stairs to a second-floor bedroom, where Nathan's bags had already arrived by the pneumatic tubes used for parcel sending on Elysium. "This will be your room, sir," he said, "until your grandmother can find time from her numerous business dealings to see you. In the meantime, I will be taking you on tours of various portions of Elys ium. I hope you enjoy your stay."

In the next few days, Phelps took Nathan around the wheel of the residential area, showing him its general layout. They drove by the closed-off and carefully guarded water and sewage treatment areas, manned entirely by robots to prevent any possibility of harm to the wealthy inhabitants of Elysium. Another day they passed by the equally well-protected control areas for performing such routine but dangerous and important tasks as remotely maneuvering the mirror outside to always reflect sunlight towards the station or distributing the power caught by the microwave antenna. Then, a few days after Nathan's arrival, Phelps informed the hopeful young law-school graduate that in the afternoon they would be visiting the home of Mr. Duncan "Donuts" Hart, owner of a large toroidal space station construction firm which, incidentally, had a large legal department. The villa grounds were done like Scottish moors, with low flat, fog-filled areas filled with heather and bracken. The house looked like a long, low castle, complete with portcullis and battlements. A robot servant, more common in this day and age than human servitors like Phelps, opened the door and remarked in almost human-sounding speech from the voder behind its simulated armored visor, "Good evening, sirrahs. Mr. Hart is awaiting you in his chambers. Follow me, please." The knight-like robot clanked away down the stone, torch-lit passage and up a set of cirular stairs to where a large, carved oaken door opened into the hall. Stopping in front of the door, he knocked and then said "You may go in now."

Nathan opened the door. The first thing he noticed was that Mr. Hart was not sitting at his desk, but rather was in the middle of the floor, sprawled on the floor in a pool of his own blood. Red stains spread out across his chest from a large, angry, ragged bullet hole, just as a crazy network of cracks emanated from a jagged hole in the middle of the window across the room. The robot and Phelps both stood still in shock, but Nathan strode across the room to look out the window. Nothing but the normal view of walls and villas beneath a sunny, starry sky presented itself.

"I don't see where the killer could have fired from!" Nathan complained bitterly, looking far and wide over the landscape.

"Ah, Mr. Loomis," Phelps hoarsely whispered, trying hard not to look at the corpse, "you have obviously not paid any attention to life on space stations. Moving objects in a rotating station do not seem to move in straight lines, or even normal gravitational trajectories. Coriolis accelerations affect them, and they move in strange, complex curves, dependent on their speed and the station's rotation. We probably have no chance of seeing where the, ah, assassin was standing." He glanced again at the dead body and turned his head away, wincing.

"Well then, we can tell the bullet's speed from its caliber and mass. We know the station's rotation speed. And we can tell its general direction from these two holes," Nathan exclaimed, counting off each point on his fingers. "Why can't we still plot its trajectory back to the firing point?"

Excitedly, the two sent the robot to fetch them polar graph paper for scratchwork and sat down at Hart's desk computer to work out a solution. Phelps constantly looked on the point of being sick, but after a few minutes they had arrived at a solution and pulled out a map of Elysium to find the murderer's location. Because of the large size of the villas on the station, only one was under suspicion, and because of their exclusivity, someone from that villa must have done the deed rather than a stranger who just wandered in. "You'd need sophisticated measuring and sighting devices to get this done," Nathan pointed out, "so this is obviously a case of premeditated murder. Who represents the police here?"

"We don't really have any," Phelps explained, "the Orbit Guard takes care of major affairs, and minor events are generally handled within the households. But by the time we got word to the Guard headquarters and it went through their bureaucracy, tomorrow afternoon's shuttle might have left with the murderer on board. It looks like you may need to make a citizen's arrest."

"All right, we'll just have to see who we're up against. Robot, tell us about Mrs. Rosamond Varley, 112 Segment Three."

The dry voice, almost human but not quite, emanated patiently from behind the mechanism's closed visor as it linked with the household's main computer and searched for references. "Rosamond Elaine Varley.... Widow of Hans Roderic Varley, former regional head of Hart Astro-Engineering, fired for unknown reasons and then worked for the competing firm of Varley and Jacobs.... Her husband committed suicide five years, three months, and twenty-six days ago.... Ever since she has lived in seclusion in her home on Elysium, visited seldom even by her son, who lives in the next villa.... End of references."

"Well, sounds like a possible motive there," Nathan said, smiling, "Can we call up a picture from the computer?" He searched through a few databases and, finally a digitized picture built up on the screen of Hart, his dead wife, Varley, and his wife standing and smiling at the camera. He recognized Mrs. Varley as the person who had been the only other passenger in his shuttle. "She just doesn't seem the murdering type..." he said.

"Maybe that's why we've found her so easily," Phelps quickly rejoindered. "This is a clever crime at first, but we solved it easily enough."

"I still don't know. Let's pay Mrs. Varley a visit." After carefully instructing the robot to call the Orbit Guard and arrange for the preservation of the body until burial, the two new investigators leapt into their car. They raced along the access road, crossed a bridge over a window segment, and found themselves on Segment Three, where most of the smaller and less elaborate villas were to be found. They stopped at the gate marked 112 and rang for admittance. "Varley residence. Who's there?" asked a computerized voice.

"Nathan Loomis and Phillip Phelps, here to pay a call on Mrs. Varley," Phelps interjected, "We'd like to see her about an urgent matter."

"You are registered as occupants of Elysium.... Mrs. Varley is unoccupied at the moment.... You may be admitted." The gate swung open with a click. The two drove their car up a driveway somewhat shorter than the others they had seen to a New England style house, looking as though it had been transplanted right out of suburban Massachusetts on Earth (for a richer client, it might very easily have been). A somewhat unkempt, unadorned robot met them at the front door. "This way, please," it said, with something of an uncorrected rasp in its voice. The mechanical servitor, gleaming dully in the sunlight, led the two in the front door and over to a small study where old Mrs. Varley was waiting for them.

"I don't believe I've ever met you two," Mrs. Varley began.

"Did you murder Duncan Hart?" Nathan asked.

A look of shock spread across Mrs. Varley's face. "No, no!" she said. "He's dead? How? I wouldn't have killed him!" She seemed to visibly slump in her chair, not with the weight of guilt, but with that of grief and surprise.

"Where were you today?" Nathan asked further.

"Here -- here in my house," the old woman stammered.

Did anyone see you here? Any servants? Anyone?"

"No, no, my household is all robots and I stay by myself. I haven't been anywhere today."

"Why did Hart fire your husband from his company?"

"I don't know. He didn't say, though I asked him, but it did hurt him terribly, and he always went downhill after that until he died. But I wouldn't kill Hart for that, I swear I wouldn't!"

"Can anyone vouch for you? A neighbor, a relative?":

"Y-yes, my son James lives next door. He doesn't come over, but I talk to him on the phone all the time."

"Tell us about him."

"He's a nice boy, makes his living on stocks. He stays rather quiet and by himself too. Runs in the family, I suppose...." Her voice trailed off. "I didn't kill him. Really I didn't! Please believe me!" Her hands were visibly shaking.

"All right, Mrs. Varley. You just stay around the house here for the next few days, and we'll be back soon to clear things up. Do you mind if we look around the house before we leave, though?"

"Go ahead, go ahead, I have nothing to hide," she pleaded.

As the ill-repaired robot showed them out after their tour of the elegant yet slowly declining home, Phelps spoke for the first time. "Why did you let her off like that? She has the motive and the opportunity."

"Yes, but I don't believe she did it! She just doesn't seem right for a killer! And you saw the grounds: the kind of brackets you would need for the rifle and the sighting equipment should have left some trace, but none of the weeds or plants had been disturbed. And do you think in a disrepaired household like this she would have a high-precision rifle?"

"All I can say is that trajectories don't lie. Newton wasn't wrong, so I say I'm not. She's just putting up a good front to disguise her revenge of her husband."

"Can we check her baggage from the shuttle? See if she brought any weaponry or had any delivered? She certainly didn't have any in that house or on the grounds. How about looking into her garbage? How about questioning her robots?"

"Robots' memories can easily be changed merely by ordering them to forget things. Both baggage and mail for Elysium residents are inviolable. Garbage is all disposed of by being incinerated in the supplemental fusion reactor, since orbital littering is a capital crime. The only piece of evidence we have or are likely to get is that bullet and its plotted trajectory, and that leads right back to Mrs. Varley."

"Well, I still think she's innocent. Let's wait for a while -- take me on that tour of the agricultural area you had promised. I want to think for a while."

"All right, but I don't think you'll meet with any success."

Phelps drove the car to one of the walls of the residential area, where they parked the car and walked to an air-lock door in the wall. The immense black partition stretched above them, white spots flecking its surface to resemble stars. Phelps opened the door and they entered a small air-lock chamber. Then the butler gave Nathan a small air tank with an attached mask which covered the wearer's nose and mouth. "What's this for?" asked Nathan.

"The agricultural area is kept at a high partial pressure of CO2 and a carefully controlled temperature to encourage plant growth. We have an air lock to maintain those special conditions, and air-masks to let people function at their normal level instead of being inhibited by the excess carbon dioxide. Under controlled conditions we can get about 225 kilograms of food per hectare per day."

Together the two cycled the air lock and passed through. Nathan felt heavy, hot, humid air enfold him like a blanket. The two investigators had emerged from the airlock on a walkway near a window, so directly in front of them was another of the stone walls that blocked out slanting cosmic radiation. "Why do windows in the residential section correspond to land in the agricultural section, and vice versa?" Nathan asked.

"So that the reflecting panels for the residential section won't block sunlight from reaching the agricultural section's mirrors," Phelps responded. "Instead the windows are staggered so that both can receive sunlight at the same time." As they emerged from the shelter of the wall, Nathan could see around him a chamber resembling the residential area, but only about half as deep and covered with plants and enclosures rather than villas. Phelps pointed out the areas where food-crops were grown and where luxury crops, originally not planned for in the station but now possible because of the reduced population, were cultivated. Here and there they saw pressurized shelters containing normal atmosphere and temperature for cattle and other livestock which provide meat to the population. Explained Phelps, "The plastic windows of the enclosures contain chemicals that become opaque when we run an electric current through them so we can provide a night period for the livestock."

"Why not just close the windows like you do for the residential section?" asked Nathan.

"The plants grow faster and better in continuous, twenty-four hour sunlight, so the windows are fixed in an open position."

"So why not put all the livestock on one land segment and just close the windows reflecting sunlight to them?"

"You can't just close some of the windows: it has to be all or none, or you'll give the station an off-center rotation."

"Wait, hold on!" Nathan stopped short in the middle of the walkway. "Get me to a computer, quickly!"

The two raced back down the walkway and through the airlock, leaped in the car and swiftly drove back to Nathan's grandmother's house. Nathan worked furiously over the desk computer terminal in his room, and eventually emerged triumphantly. "Take me to 111 Segment Three!" he shouted to Phelps. The butler looked puzzled but obeyed the command, and within a few minutes the two were outside the gate to the villa adjoining Mrs. Varley's. Nathan rang the bell, and a cool mechanical voice said "Varley residence. Who is calling please?"

"Nathan Loomis and Phillip Phelps calling on an urgent matter," Nathan answered while Phelps looked on in puzzlement.

"You are refused admittance," the voice responded, "please call back some other time." But Nathan was already walking along the base of the stone wall, looking closely at it. He stopped and jumped upwards, catching hold of a small crack midway up, and began struggling upwards. Phelps ran up and gave him a boost, and from the top of the wall Nathan pulled his companion up beside him. The young lawyer leapt down from the wall into the inside of the villa enclosure and began making his way through the shrubbery towards the house, Phelps following at his heels. Nathan circled around as they approached the residence itself, and as they came up on the porch a surprising sight met their eyes. A young man was on the porch, disassembling a tripod on which was mounted a sleek-looking rifle, connected by a cable to a computer and a complicated-looking sighting device.

"Stop, police!" Nathan cried, perhaps taking on more responsiblity than his job as lawyer granted him. The young man jumped up, seized the rifle, and fired a shot into the shrubbery. Then he turned and ran into the building, with the two companions in close pursuit. The building was furnished in rather low class as far as Elysium was concerned, but this would have been rather posh anywhere else. However, the pursuers had little time to critique the furniture as they chased the culprit to the garage, where he leapt into a small electric car and went roaring down the driveway. "This way!" Nathan shouted, and ran towards the wall. The two climbed a tree and vaulted over to their own car, soon speeding along in pursuit of their quarry.

In the chase, their prey had no chance to dip behind the horizon or disappear behind a hill, because a space-station has neither. But Nathan and Phelps had no chance to gain on the murderer either, since all cars on Elysium had roughly equal performance. They pursued him all along the access road and over a few bridges joining segments, until finally he stopped some distance ahead. By the time they caught up, the two saw that he had torn open a hatch in the wall leading into some dark space beyond. Beside the hatch the rifle lay twisted, obviously misused as a crowbar on the recalcitrant entrance. "Quick, what's through here?" Nathan asked urgently.

"Nothing but the full-g industrial section," Phelps answered, "nothing but unused labs, offices, and machinery. It's been vacant for years. No-one ever goes there."

"That's exactly why he's gone there. You stay here in case he comes back," Nathan ordered, and plunged into the blackness with a flashlight from the tool kit in the back of the car. As he entered, dust sprang up before his feet and his steps re-echoed from the walls up and down the corridor. Yet his flashlight picked up the only other disturbances in the dust of years of disuse: the footprints of his adversary. The air is rather stale in here too, Nathan thought: they must have had the ventilation shut off for years along with the power. As his breath rasped in his throat he followed the tracks, tramping up and down through vacant offices, conference rooms, and laboratories of dusty and broken equipment, tombs and mausoleums of science slaughtered for pleasure's sake. Suddenly the walls opened up around him into an immense shaft, some sort of air-circulation space with corroded bulletin boards mounted in the middle and staircases circling the walls. Suddenly, with a fierce, hoarse shout, a dark shape launched itself from high on the stairwell directly towards Nathan. Stunned, the young man could do l ittle but stand, frozen, as his enemy descended towards him in the dark. Yet even as he watched, the murderer's trajectory seemed to go slightly awry, and the killer crashed to the ground some five feet from his intended landing-place -- Nathan. As the crumpled body gave a moan, Nathan gave it one sharp rap on the head for safety and set himself to dragging it back to the open air of the residential section.

The Orbit Guard tended to respond swiftly when given a murderer to seize rather than a mystery to solve, so by the next day James Varley had been arrested and incarcerated, and Nathan and Phelps were relaxing together in Nathan's grandmother's house to hash out the last details of the case. "But how did you figure out it was James who was the killer?" Phelps asked, hoping, now that peace was restored, to at last get an answer.

"When you were showing me the agricultural station, your comment on off-center spins suddenly reminded me that the extendable mirrors can change the spin rate. The residential section is longer than the agricultural section, so its reflecting panels extend out farther when they're open. When the mirrors are extended in the day, the station's radius effectively increases, increasing its rotational inertia, so its spin rate slows down. But the radius and spin rate given in the references is for the station with all the windows closed. We used the wrong spin rate in our calculations and ended up with the wrong suspect. I went back and refigured the calculations and found the change in trajectory was just enough to put the assassin in James Varley's villa. I did some research and found he owned major stock in the two companies his father had worked for, and stood to acquire a great deal more as an inheritance when his mother died. He counted on our miscalculation, and reasoned that if Hart died and his mother were executed for murder, he would acquire large amounts of stock in both companies and be able to buy up even more of Hart's company's stock at a reduced price in the shock of his death. He had always blamed Hart for firing his father and his mother for driving him to death with guilt, so here was his chance to gain revenge on both counts and make a great deal of money at the same time, all with seemingly little risk to himself. When we went to his villa and found the murder weapon itself, our case was complete, except for the formal necessities like the ballistics tests the Orbit Guard just finished. All we had to do was hunt him down and chase him."

"Yes," interjected Phelps, "you were certainly lucky there. Though Varley had an intellectual feel for Coriolis acceleration and used it to cover up his crime, he didn't have an emotional, instinctive feel for it. I don't think any human ever can. When he jumped off that stairwell to crush you, he didn't think that the station and you would rotate beneath him enough that he'd miss the human cushion he'd planned on. The medics say he's all right except for a few strained ligaments and bad bruises -- certainly fit enough to stand trial."

"It certainly was an interesting first case," Nathan answered. "I think I'll always remember my experiences here on Elysium, and certainly the refresher in physics I've had. Varley used Coriolis acceleration to accomplish a crime, yet it also proved his downfall. I guess I could say that, no matter how strange my future cases may be, this first one certainly had a lot of unexpected twists to it."