Manifold: Space

by Stephen Baxter

  Malenfant and Nemoto, by comparison, had gone straight on the talk shows.

  Playfully, Maura slapped Malenfant's wrist. "Naughty, naughty. All those commissions you skipped. You made a lot of enemies there."

  "But," he said, "I did get to sleep in the Lincoln Bedroom at the White House. You know, this guy makes it sound as if he'd rather we hadn't made the discovery at all, rather than make it the wrong way."

  "Human nature, Malenfant. You took away his toy."

  Now the speaker opened the floor for comments.

  The discussion soon turned to how the situation should be managed from here. There were plenty of calls for behavioral scientists to study ways in which the public response to the news could be somehow anticipated and controlled – for research into popular public images of ETs, discussion of analogies with the response to missions like Apollo to the Moon and Viking to Mars, and suggestions that SETI proponents should make use of media like webcasts, games, and music to present SETI and ET themes "responsibly."

  Maura pulled an elaborate face. "Don't these people realize the cat is already out of the bag? You can't control the public's access to information anymore – and you certainly can't control their response. Nor should you try, in my opinion."

  At last the speaker cleared off the stage, and Malenfant's spirits lifted a little. As an engineer, he knew that a bucket-load of philosophical principles wasn't worth a grain of good hard fact. And that was why the next item, by Frank Paulis, was a breath of fresh air. After all, it was Paulis, with his money and his initiative, who was actually going out there to look.

  Paulis's images of his en-route spacecraft, the Bruno, showed a gangly, glittering dragonfly of solar-cell panels and gauzy antennae and sensors mounted on long booms, surrounded by a swarm of microsats devoted to fly-around inspections and repairs.

  The launch had been uneventful, the first years of the long flight enlivened only by the usual hardware glitches and nail-biting techie dramas. It struck Malenfant as remarkable how little space technology seemed to have progressed in seventy years since the first Sputnik; the design of the Bruno would probably have been recognizable, give or take a few sapphire-based quantum chips, to Wernher von Braun. But flying in space had always been a conservative business; if you had only one shot, you wanted your ship to work, not to serve as the test bed for new gadgets and ideas.

  Anyhow, the Bruno had survived its man-made crises. The ship was still a year away from its rendezvous with what appeared to be the primary construction site – or colony, or nest – of the Gaijin. The asteroid belt was a broad lane of rubble; already the probe had encountered a number of those dusty wanderers, never visited before or seen in close-up. But, Paulis promised, standing before slide after slide of coal-dark, anonymous rocks, the best was yet to come. For in the darkness, the Gaijin awaited.

  After a morning of such thin gruel, Malenfant retreated to his hotel room.

  He traveled light these days: just bathroom stuff, a couple of self-cleaning suits and sets of underwear, a softscreen that was all he needed to connect him to the rest of the species, and a single ornament – a piece of unbelievably ancient rock from the far side of the Moon, carved into an exquisite Fox God. He had become minimal. The time he had spent on the Japanese Moon, he supposed, had changed him, no doubt for the better.

  He spent a half hour watching heavily filtered and interpreted news on his softscreen. He needed to know what was going on, but he was too old to have any patience with the evanescent buzz of instant commentaries.

  A corner of his softscreen rippled with light: an incoming message.

  It was Nemoto. It was the first time she'd contacted Malenfant in years.

  "Nemoto! Where are you?"

  There was a delay of a few seconds before her reply came back, her face creasing into a thin smile. That could place her on the Moon. But the delay could be a fake...

  "You should know better than to ask me that, Malenfant."

  "Yeah. Sorry."

  She was still under forty, but she wasn't aging well, he thought. Her hair remained thick and jet black, but her oval face had shed its prettiness: grown angular, the bones showing, her eyes dark and sunken with suspicion. Her voice, from the softscreen's tiny speakers, was an insect whisper. "You are enjoying the conference?"

  "Not much." He shared with her his gripe over too many philosophers.

  "But there are worse fools. Here is some more philosophy for you: 'This is the way I think the world will end – with general giggling by all the witty heads, who think it is a joke.' Kierkegaard."

  "He got it right." Whoever he was.

  "And philosophy can sometimes guide us, Malenfant."

  "For instance – "

  "For instance, the notion of equilibrium..."

  It was like resuming a conversation they had pursued, on and off, for nine years; a slow teasing-out of the koan.

  After their notoriety following the announcement of the aliens in the belt, Nemoto had recoiled completely. She'd refused all offers of public appearances, had quit her job, had turned down offers of research positions from a dozen of the world's most prestigious universities and corporations, and had effectively disappeared. All this while Malenfant had slogged around the public circuit with diminishing enthusiasm, enduring the brickbats and bouquets that came from his sliver of fame. She had been an Armstrong, he sometimes thought wryly, to his own Aldrin.

  But she was continuing her researches – though what her purpose was, and where her money was coming from, he couldn't have said.

  She didn't like the Gaijin, though. That much was obvious.

  "We imagined only two possible equilibrium states: no aliens, or aliens everywhere," she said softly. "We have diagnosed this moment, the moment of first contact, as a transition between equilibriums, brief and therefore unlikely for us to be living through. But what if that's wrong? What if this is the true state of equilibrium?"

  Malenfant frowned. "I don't get it. Contact changes everything. How can a change be described as an equilibrium?"

  "If it happens more than once. Over and over and over. In that case it's no coincidence that I happen to be alive, here and now, to witness this. It's no coincidence that we happen to have a technical culture capable of detecting the signals, even initiating contact, of a sort, just at this moment. Because this isn't unique."

  "You're saying this happened before? That others have been here? Then where did they go?"

  "I can't think of any answers that don't scare me, Malenfant."

  He studied her. Her eyes were almost invisible, her face an expressionless mask. The background was dark, anonymous, no doubt scrambled beyond the reach of image-enhancement routines.

  He considered what to say. You're spending too much time alone. You need to get out more. But he was scarcely a friend to this strange, obsessive woman. "You've spent a lot of time thinking about this, haven't you?"

  She seemed offended. "This is the destiny of the species."

  He sighed. "What is it you called me about, Nemoto?"

  "To warn you," she said. "It isn't quite true that we are waiting on Frank Paulis and his space probe for new data. There are two items of interest. First, a fresh interpretation. I've been able to deduce patterns from the infrared signature of the Gaijin's activity in the belt. I believe I have determined their pattern of propagation."

  Her face disappeared, to be replaced by the virtual display of the type she'd first shown him in the silence of the Moon. It was a ring of glistening crimson droplets, slowly orbiting: the asteroid belt, complete with dark Kirkwood gaps. And there was the gap with the one-to-three resonance with Jupiter, with its string of rubies, enigmatic, brilliant.

  "Watch, Malenfant..."

  Malenfant bent close to the screen and studied the little beads of light. The images cycled with small vector arrows, which showed velocity and acceleration. The rubies weren't in simple orbits about the Sun, he saw; they seemed to be spreading around the belt, some of them
actually moving retrograde, against the motion of the rest of the belt.

  The motion was intriguing.

  "Imagine the arrows projected backwards," Nemoto said.

  "Ah," Malenfant said. "Yes. They might converge."

  Nemoto cut in a routine to extrapolate back from the Gaijin sites' velocity vectors. "This is rough and ready," she admitted. "I had to make a lot of assumptions about how the objects' trajectories had deviated from simple orbits through the Sun's gravitational field. But it did not take long before I found an answer."

  The projected paths arced out of the asteroid belt – out, away from the Sun, into the deeper darkness, before converging.

  Malenfant tapped the screen. "You found it. The prime radiant. Where these probes, or factories, or whatever the hell they are, are emanating from."

  "It is one point four times ten to power fourteen meters from the Sun," Nemoto said. "That is – "

  "About a thousand astronomical units out." A thousand times as far as Earth from the Sun. "Somewhere in the direction of Virgo... But why there?"

  "I do not know. I need more data, more work."

  "And your second item?"

  She eyed him. "You are meeting Maura Della. Ask her about Rigil Kent."

  Rigil Kent. Also known as Alpha Centauri, nearest star system to the Sun, four light-years away.

  "Nemoto – "

  But the softscreen had already filled up with the everyday froth of the online news channels; Nemoto had receded into darkness.

  He was taken to lunch by former congresswoman Della.

  After lunch they strolled around the conference hall, glancing at poster presentations and the fringe sessions. Malenfant felt uncomfortable being out in public like this.

  "I wouldn't be too concerned," Maura said. "Not here; you have to be afraid of the ones who stay at home polishing the telescope sights on their rifles."

  "Not funny, Maura."

  "Perhaps not. Sorry."

  She hadn't said a significant word during lunch; now he couldn't contain himself any more. "Rigil Kent," he said.

  She slowed to a halt. Her voice low, she said, "You spoiled my surprise. I should have known you'd find out."

  "What's going on, Maura?"

  For answer she took him to a small, overpriced coffee bar. On a handheld softscreen she showed him images of the great radio telescope at Arecibo, various microwave satellites, activity in the Main Bay at JPL: arcs of consoles, young, excited engineers on roller chairs, information flickering over screens before them.

  "Malenfant, we've picked up a signal. From Alpha Centauri."

  "What? How – ?"

  She pressed a finger to his lips.

  As it turned out – though this bit of news had been Maura's true motive for inviting him here – there was little more to tell. Maura had gotten the news from her contacts in the government. The signal was faint, first picked up by an orbital microwave satellite. But it was nothing like the neatly structured Lincos signals humans had been sending to the asteroid belt. It was heavily compressed, a mush of apparently incoherent noise, with only evanescent hints of structure – much what Earth might have sounded like, from four light-years away.

  "Or it may be an efficient signal," Malenfant said hoarsely. "It can't be cheap to signal between the stars. You'd take out as much redundancy – repetitive structure – as possible. If you don't know how to decode it, such a signal must look like noise..." Either way the implication was clear. This wasn't a signal meant for humans.

  But whoever was there, at Alpha Centauri, had only just started to broadcast – or rather, only four years in the past, given the time it took for signals to crawl to Earth.

  In fact the signal's existence and nature was still being verified. "This time we're following the protocols, Malenfant..."

  "Is it the Gaijin? Or somebody else?"

  "We don't know."

  "Keep me informed."

  "Oh, yes," she said. "But keep it to yourself."

  Malenfant stayed in his hotel room the rest of the night, unable to relax, pacing back and forth until Nemoto called again.

  He was furious Nemoto had known all about Centauri. But he controlled his irritation.

  "At least," he said, "this discovery demolishes theories that the Gaijin might be native to our Solar System. If they came from Centauri –"

  "Of course they don't come from Centauri," Nemoto said. "Why would they suddenly start making such a radio clatter if that was so? No, Malenfant. They only just arrived in the Centauri system. Just as they only just arrived here. Apparently we are watching the vanguard of a wave of colonization, Malenfant, extending far from our system."

  "But –"

  Nemoto waved a delicate hand before her face. "But that isn't important, Malenfant. None of this is. Not even the activity in the asteroids."

  "Then what is?"

  "I have determined the nature of the Gaijin's prime radiant, here in the Solar System."

  "The nature? You said it is a thousand AU out. What's out there to have a nature at all?"

  "A solar focus," Nemoto said.

  "A what?"

  "That far out is where you will find the focal points of the Sun's gravitational field. Images of remote stars, magnified by gravitational lensing. And the star that is focused at the Gaijin prime radiant is –"

  "Alpha Centauri?" The stubbly hairs on the back of his neck stood on end.

  "You see, Malenfant?" she said grimly. "Any number of probes to the belt won't answer the fundamental questions."

  "No." Malenfant shook his head, mind racing. "We've got to send somebody out there. Through a thousand AU; out to the solar focus... But that's impossible."

  "Nevertheless that is the challenge, Malenfant. There – at the solar focus – is where the answers will be found. That is where we must go."

  Chapter 4

  Ellis Island

  Maura was flying around an asteroid.

  The asteroid – whimsically christened Ellis Island by the Bootstrap flight controllers at JPL – was three kilometers wide, twelve long. The compound body looked like two lumpy baked potatoes stuck end to end, dark and dusty. Maura could see extensions of the Bruno's equipment ahead of her: elaborate claws and grapples, lines that coiled out across space to where rocket-driven pitons had already dug themselves into the asteroid's soft, friable surface.

  With an effort she turned her head. Her viewpoint swiveled. The asteroid shifted out to the left; the image, heavily enhanced and extrapolated from the feed returned by Bruno, blurred slightly as the processors struggled to keep up with her willfulness.

  She was suspended in a darkness that was broken only by pinpoints of light. There were stars all around her: above, below, behind. Here she was in the middle of the asteroid belt, but there was not a single body, save for Ellis itself, large enough to show a disc. Even the Sun had shrunk to a yellow dot, casting long shadows, and she knew that it shed on this lonely rock only a few percent of the heat and light it vouchsafed Earth.

  The asteroid belt had turned out to be surprisingly empty: a cold, excessively roomy place. And yet it was here the Gaijin had chosen to come.

  Xenia Makarova, Bootstrap's VIP host for the day, whispered in her ear. "Ms. Della, are you enjoying the show?"

  She suppressed a sigh. "Yes, dear. Of course I am. Very impressive."

  And so it was. In her time as part of the president's science advisory team, she'd put in a lot of hours on spaceflight stunts like this, manned and unmanned. She had to admit that being able to share the experience vicariously – to be able to sit in her own apartment wearing her VR headband, and yet to ride down to the asteroid with the probe itself – was a vast improvement on what had been on offer before: those cramped visitors' booths behind Mission Control at the Johnson Space Center, that noisy auditorium at JPL.

  And yet she felt restless, here in the dark and cold. She longed to cut her VR link to the Bruno feed, to drink in the sunlight that washed over the Baltimore
harbor area, visible from her apartment window just a meter away.

  "It's just that space operations are always so darn slow," she said to Xenia.

  "But we have to take it slow," Xenia said. "Encountering an asteroid is more like docking with another spacecraft than landing; the gravity here is so feeble the main challenge is not to bounce off and fly away.

  "We're coming down at the asteroid's north pole. The main Gaijin site appears to be at the other rotation pole, the south pole. What we intend is to land out of sight of the Gaijin – assuming we haven't been spotted already – and work our way around the surface to the aliens. That way we may be able to keep a measure of control over events..."

  "This is a terribly dark and dusty place, isn't it?"

  "That's because this is a C-type asteroid, Ms. Della. Ice, volatiles, and organic compounds: just the kind of rock we might have chosen to mine for ourselves, for life support, propellant."

  Yes, Maura thought with a flicker of dark anger. This is our belt, our asteroid. Our treasure, a legacy of the Solar System's violent origins for our future. And yet there are Gaijin here – strangers, taking our birthright.

  Her anger surprised her; she hadn't suspected she was so territorial. It's not as if they landed in Antarctica, she told herself. The asteroids aren't yet ours; we have no claim here, and therefore shouldn't feel threatened by the Gaijin's appropriation.