Multiples

by Robert Silverberg

  The military people were about evenly divided between the two factions. A couple of them, the hair-splitting career-minded ones, wanted to play it absolutely safe and clear out of here fast, and the others, the up-and-away hero types, spoke out in favor of forging ahead with contact and to hell with the risks.

  I could see there wasn’t going to be any consensus. It was going to come down to me to decide.

  By nature I am cautious. I might have voted with Nakamura in favor of immediate withdrawal; however that would have made my ancient cold-eyed Sioux forebears howl. Yet in the end what swayed me was an argument that came from Bryce-Williamson, one of the fiercest of the military sorts. He said that we didn’t dare turn tail and run for home without making contact, because the aliens would take that either as a hostile act or a stupid one, and either way they might just slap some kind of tracer on us that ultimately would enable them to discover the location of our home world. True caution, he said, required us to try to find out what these people were all about before we made any move to leave the scene. We couldn’t just run and we couldn’t simply ignore them.

  I sat quietly for a long time, weighing everything.

  “Well?” Bjornsen asked. “What do you want to do, Tom?”

  “Send them a broadcast,” I said. “Give them greetings in the name of Earth and all its peoples. Extend to them the benevolent warm wishes of the board of directors of IBM/Toshiba. And then we’ll wait and see.”

  We waited. But for a long while we didn’t see.

  Two days, and then some. We went round and round the neutron star, and they went round and round the neutron star, and no further communication came from them. We beamed them all sorts of messages at all sorts of frequencies along the spectrum, both in the radio band and via infra-red and ultraviolet as well, so that they’d have plenty of material to work with. Perhaps their translator gadget wasn’t all that good, I told myself hopefully. Perhaps it was stripping its gears trying to fathom the pleasant little packets of semantic data that we had sent them.

  On the third day of silence I began feeling restless. There was no way we could begin the work we had been sent here to do, not with aliens watching. The Toshiba people—the Ultra Cautious faction—got more and more nervous. Even the IBM representatives began to act a little twitchy. I started to question the wisdom of having overruled the advocates of a no-contact policy. Although the parent companies hadn’t seriously expected us to run into aliens, they had covered that eventuality in our instructions, and we were under orders to do minimum tipping of our hands if we found ourselves observed by strangers. But it was too late to call back our messages and I was still eager to find out what would happen next. So we watched and waited, and then we waited and watched. Round and round the neutron star.

  We had been parked in orbit for ten days now around the neutron star, an orbit calculated to bring us no closer to its surface than 9000 kilometers at the closest skim. That was close enough for us to carry out our work, but not so close that we would be subjected to troublesome and dangerous tidal effects.

  The neutron star had been formed in the supernova explosion that had destroyed the smaller of the two suns in what had once been a binary star system here. At the moment of the cataclysmic collapse of the stellar sphere, all its matter had come rushing inward with such force that electrons and protons were driven into each other to become a soup of pure neutrons. Which then were squeezed so tightly that they were forced virtually into contact with one another, creating a smooth globe of the strange stuff that we call neutronium, a billion billion times denser than steel and a hundred billion billion times more incompressible.

  That tiny ball of neutronium glowing dimly in our screens was the neutron star. It was just eighteen kilometers in diameter but its mass was greater than that of Earth’s sun. That gave it a gravitational field a quarter of a billion billion times as strong as that of the surface of Earth. If we could somehow set foot on it, we wouldn’t just be squashed flat, we’d be instantly reduced to fine powder by the colossal tidal effects—the difference in gravitational pull between the soles of our feet and the tops of our heads, stretching us towards and away from the neutron star’s center with a kick of eighteen billion kilograms.

  A ghostly halo of electromagnetic energy surrounded the neutron star: X-rays, radio waves, gammas, and an oily, crackling flicker of violet light. The neutron star was rotating on its axis some 550 times a second, and powerful jets of electrons were spouting from its magnetic poles at each sweep, sending forth a beacon-like pulsar broadcast of the familiar type that we have been able to detect since the middle of the twentieth century.

  Behind that zone of fiercely outflung radiation lay the neutron star’s atmosphere: an envelope of gaseous iron a few centimeters thick. Below that, our scan had told us, was a two-kilometers-thick crust of normal matter, heavy elements only, ranging from molybdenum on up to transuranics with atomic numbers as high as 140. And within that was the neutronium zone, the stripped nuclei of iron packed unimaginably close together, an ocean of strangeness nine kilometers deep. What lay at the heart of that, we could only guess.

  We had come here to plunge a probe into the neutronium zone and carry off a spoonful of star-stuff that weighed 100 billion tons per cubic centimeter.

  No sort of conventional landing on the neutron star was possible or even conceivable. Not only was the gravitational pull beyond our comprehension—anything that was capable of withstanding the tidal effects would still have to cope with an escape velocity requirement of 200,000 kilometers per second when it tried to take off, two thirds the speed of light—but the neutron star’s surface temperature was something like 3.5 million degrees. The surface temperature of our own sun is six thousand degrees and we don’t try to make landings there. Even at this distance, our heat and radiation shields were straining to the limits to keep us from being cooked. We didn’t intend to go any closer.

  What IBM/Toshiba wanted us to do was to put a miniature hyperspace ship into orbit around the neutron star: an astonishing little vessel no bigger than your clenched fist, powered by a fantastically scaled-down version of the drive that had carried us through the space-time manifold across a span of a thousand light-years in a dozen weeks. The little ship was a slave-drone; we would operate it from the Ben-wah Maru. Or, rather, Brain Central would. In a maneuver that had taken fifty computer-years to program, we would send the miniature into hyperspace and bring it out again right inside the neutron star. And keep it there a billionth of a second, long enough for it to gulp the spoonful of neutronium we had been sent here to collect. Then we’d head for home, with the miniature ship following us along the same hyperpath.

  We’d head for home, that is, unless the slave-drone’s brief intrusion into the neutron star released disruptive forces that splattered us all over this end of the galaxy. IBM/Toshiba didn’t really think that was going to happen. In theory a neutron star is one of the most stable things there is in the universe, and the math didn’t indicate that taking a nip from its interior would cause real problems. This neighborhood had already had its full quota of giant explosions, anyway.

  Still, the possibility existed. Especially since there was a black hole just thirty light-minutes away, a souvenir of the second and much larger supernova bang that had happened here in the recent past. Having a black hole nearby is a little like playing with an extra wild card whose existence isn’t made known to the players until some randomly chosen moment midway through the game. If we destabilized the neutron star in some way not anticipated by the scientists back on Earth, we might just find ourselves going for a visit to the event horizon instead of getting to go home. Or we might not. There was only one way of finding out.

  I didn’t know, by the way, what use the parent companies planned to make of the neutronium we had been hired to bring them. I hoped it was a good one.

  But obviously we weren’t going to tackle any of this while there was an alien ship in the vicinity. So all we could do was
wait. And see. Right now we were doing a lot of waiting, and no seeing at all.

  Two days later Cal Bjornsen said, “We’re getting a message back from them now. Audio only. In English.”

  We had wanted that, we had even hoped for that. And yet it shook me to learn that it was happening.

  “Let’s hear it,” I said.

  “The relay’s coming over ship channel seven.”

  I tuned in. What I heard was an obviously synthetic voice, no undertones or overtones, not much inflection. They were trying to mimic the speech rhythms of what we had sent them, and I suppose they were actually doing a fair job of it, but the result was still unmistakably mechanical-sounding. Of course there might be nothing on board that ship but a computer, I thought, or maybe robots. I wish now that they had been robots.

  It had the absolute and utter familiarity of a recurring dream. In stiff, halting, but weirdly comprehensible English came the first greetings of an alien race to the people of the planet of Earth. “This who speak be First of Nine Sparg,” the voice said. Nine Sparg, we soon realized from context, was the name of their planet. First might have been the speaker’s name, or his—hers, its?—title; that was unclear, and stayed that way. In an awkward pidgin-English that we nevertheless had little trouble understanding, First expressed gratitude for our transmission and asked us to send more words. To send a dictionary, in fact: now that they had the algorithm for our speech they needed more content to jam in behind it, so that we could go on to exchange more complex statements than Hello and How are you.

  Bjornsen queried me on the override. “We’ve got an English program that we could start feeding them,” he said. “Thirty thousand words: that should give them plenty. You want me to put it on for them?”

  “Not so fast,” I said. “We need to edit it first.”

  “For what?”

  “Anything that might help them find the location of Earth. That’s in our orders, under Eventuality of Contact with Extraterrestrials. Remember, I have Nakamura and Nagy-Szabo breathing down my neck, telling me that there’s a ship full of boogiemen out there and we mustn’t have anything to do with them. I don’t believe that myself. But right now we don’t know how friendly these Spargs are and we aren’t supposed to bring strangers home with us.”

  “But how could a dictionary entry—”

  “Suppose the sun—our sun—is defined as a yellow G2 type star,” I said. “That gives them a pretty good beginning. Or something about the constellations as seen from Earth. I don’t know, Cal. I just want to make sure we don’t accidentally hand these beings a road-map to our home planet before we find out what sort of critters they are.”

  Three of us spent half a day screening the dictionary, and we put Brain Central to work on it too. In the end we pulled seven words—you’d laugh if you knew which they were, but we wanted to be careful—and sent the rest across to the Spargs. They were silent for nine or ten hours. When they came back on the air their command of English was immensely more fluent. Frighteningly more fluent. Yesterday First had sounded like a tourist using a Fifty Handy Phrases program. A day later, First’s command of English was as good as that of an intelligent Japanese who has been living in the United States for ten or fifteen years.

  It was a tense, wary conversation. Or so it seemed to me, the way it began to seem that First was male and that his way of speaking was brusque and bluntly probing. I may have been wrong on every count.

  First wanted to know who we were and why we were here. Jumping right in, getting down to the heart of the matter. I felt a little like a butterfly collector who has wandered onto the grounds of a fusion plant and is being interrogated by a security guard. But I kept my tone and phrasing as neutral as I could, and told him that our planet was called Earth and that we had come on a mission of exploration and investigation.

  So had they, he told me. Where is Earth?

  Pretty straightforward of him, I thought. I answered that I lacked at this point a means of explaining galactic positions to him in terms that he would understand. I did volunteer the information that Earth was not anywhere close at hand.

  He was willing to drop that line of inquiry for the time being. He shifted to the other obvious one:

  What were we investigating?

  Certain properties of collapsed stars, I said, after a bit of hesitation.

  And which properties were those?

  I told him that we didn’t have enough vocabulary in common for me to try to explain that either.

  The Nine Sparg captain seemed to accept that evasion too. And provided me with a pause that indicated that it was my turn. Fair enough.

  When I asked him what he was doing here, he replied without any apparent trace of evasiveness that he had come on a mission of historical inquiry. I pressed for details. It has to do with the ancestry of our race, he said. We used to live in this part of the galaxy, before the great explosion. No hesitation at all about telling me that. It struck me that First was being less reticent about dealing with my queries than I was with his; but of course I had no way of judging whether I was hearing the truth from him.

  “I’d like to know more,” I said, as much as a test as anything else. “How long ago did your people flee this great explosion? And how far from here is your present home world?”

  A long silence: several minutes. I wondered uncomfortably if I had overplayed my hand. If they were as edgy about our finding their home world as I was about their finding ours, I had to be careful not to push them into an overreaction. They might just think that the safest thing to do would be to blow us out of the sky as soon as they had learned all they could from us.

  But when First spoke again it was only to say, “Are you willing to establish contact in the visual band?”

  “Is such a thing possible?”

  “We think so,” he said.

  I thought about it. Would letting them see what we looked like give them any sort of clue to the location of Earth? Perhaps, but it seemed far-fetched. Maybe they’d be able to guess that we were carbon-based oxygen-breathers, but the risk of allowing them to know that seemed relatively small. And in any case we’d find out what they looked like. An even trade, right?

  I had my doubts that their video transmission system could be made compatible with our receiving equipment. But I gave First the go-ahead and turned the microphone over to the communications staff. Who struggled with the problem for a day and a half. Sending the signal back and forth was no big deal, but breaking it down into information that would paint a picture on a cathode-ray tube was a different matter. The communications people at both ends talked and talked and talked, while I fretted about how much technical information about us we were revealing to the Spargs. The tinkering went on and on and nothing appeared on screen except occasional strings of horizontal lines. We sent them more data about how our television system worked. They made further adjustments in their transmission devices. This time we got spots instead of lines. We sent even more data. Were they leading us on? And were we telling them too much? I came finally to the position that trying to make the video link work had been a bad idea, and started to tell Communications that. But then the haze of drifting spots on my screen abruptly cleared and I found myself looking into the face of an alien being.

  An alien face, yes. Extremely alien. Suddenly this whole interchange was kicked up to a new level of reality.

  A hairless wedge-shaped head, flat and broad on top, tapering to a sharp point below. Corrugated skin that looked as thick as heavy rubber. Two chilly eyes in the center of that wide forehead and two more at its extreme edges. Three mouths, vertical slits, side by side: one for speaking and the other two, maybe for separate intake of fluids and solids. The whole business supported by three long columnar necks as thick as a man’s wrist, separated by open spaces two or three centimeters wide. What was below the neck we never got to see. But the head alone was plenty.

  They probably thought we were just as strange.

  With video es
tablished, First and I picked up our conversation right where we had broken it off the day before. Once more he was not in the least shy about telling me things.

  He had been able to calculate in our units of time the date of the great explosion that had driven his people far from home world: it had taken place 387 years ago. He didn’t use the word “supernova,” because it hadn’t been included in the 30,000-word vocabulary we had sent them, but that was obviously what he meant by “the great explosion.” The 387-year figure squared pretty well with our own calculations, which were based on an analysis of the surface temperature and rate of rotation of the neutron star.

  The Nine Sparg people had had plenty of warning that their sun was behaving oddly—the first signs of instability had become apparent more than a century before the blow-up—and they had devoted all their energy for several generations to the job of packing up and clearing out. It had taken many years, it seemed, for them to accomplish their migration to the distant new world they had chosen for their new home. Did that mean, I asked myself, that their method of interstellar travel was much slower than ours, and that they had needed decades or even a century to cover fifty or a hundred light-years? Earth had less to worry about, then. Even if they wanted to make trouble for us, they wouldn’t be able easily to reach us, a thousand light-years from here. Or was First saying that their new world was really distant—all the way across the galaxy, perhaps, seventy or eighty thousand light-years away, or even in some other galaxy altogether? If that was the case, we were up against truly superior beings. But there was no easy way for me to question him about such things without telling him things about our own hyperdrive and our distance from this system that I didn’t care to have him know.