Earthlight (Arthur C. Clarke Collection)

by Arthur C. Clarke

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  best description of modern man would be a paper-wasting ani­mal.

  Below the headings "Director and "Deputy Director" the chart split three ways under the captions administration, technical services, and observatory. Sadler looked for Dr. Molton; yes, there he was, in the observatory section, directly beneath the chief scientist and heading the short col­umn of names labeled "Spectroscopy." He seemed to have six assistants: two of them—Jamieson and Wheeler—were men to whom Sadler had just been introduced. The other traveler in the monocab, he discovered, was not really a scientist at all. He had a little box of his own on the chart, and was responsible to no one but the director. Sadler suspected that Secretary Wagnall was probably quite a power in the land, and would be well worth cultivating.

  He had been studying the chart for half an hour, and had completely lost himself in its ramifications, when someone switched on the radio. Sadler had no objection to the soft music that filled the car; his powers of concentration could deal with worse interference than this. Then the music stopped; there was a brief pause, the six beeps of a time signal, and a suave voice began:

  "This is Earth, Channel Two, Interplanetary Network. The signal you have just heard was twenty-one hundred hours G.M.T. Here is the news,"

  There was no trace of interference. The words were as clear as if they were coming from a local station. Yet Sadler had noticed the skyward tilting antenna system on the roof of the monocab, and knew that he was listening to a direct trans­mission. The words he was hearing had left Earth almost one and a half seconds ago. Already they would be heading past him to far more distant worlds. There would be men who would not hear them for minutes yet—perhaps for hours, if the ships that the Federation had beyond Saturn were listening in. And that voice from Earth would still go on, expanding and fading, far beyond the uttermost limits of man's explorations, until somewhere on the way to Alpha Centauri it was at last obliterated by the ceaseless radio whispering of the stars them­selves.

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  "Here is the news. It has just been announced from the Hague that the conference on planetary resources has broken down. The delegates of the Federation are leaving Earth to­morrow, and the following statement has been issued from the office of the President. . . ."

  There was nothing here that Sadler had not expected. But when a fear, however long anticipated, turns into a fact, there is always that same sinking of the heart. He glanced at his companions. Did they realize how serious this was ?

  They did. Secretary Wagnall had his chin cupped fiercely In his hands; Dr. Molton was leaning back in his chair, eyes closed; Jamieson and Wheeler were staring at the table in glum concentration. Yes, they understood. Their work and their remoteness from Earth had not isolated them from the main currents of human affairs.

  The impersonal voice, with its catalogue of disagreements and countercharges, of threats barely veiled by the euphemisms of diplomacy, seemed to bring the inhuman cold of the lunar night seeping through the walls. It was hard to face the bitter truth, and millions of men would still be living in a fool's para­dise. They would shrug their shoulders and say with forced cheerfulness, "Don't worry—it will all blow over."

  Sadler did not believe so. As he sat in that little, brightly illuminated cylinder racing north across the Sea of Rains, he knew that for the first time in two hundred years humanity was faced with the threat of war.

  Chapter II

  if war came, thought Sadler, it would be a tragedy of cir­cumstances rather than deliberate policy. Indeed, the stubborn fact that had brought Earth into conflict with her ex-colonies sometimes seemed to him like a bad joke on the part of Nature. Even before his unwelcome and unexpected assignment, Sadler had been well aware of the main facts behind the cur­rent crisis. It had been developing for more than a generation, and it arose from the peculiar position of the planet Earth.

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  The human race had been born on a world unique in the solar system, loaded with a mineral wealth unmatched else­where. This accident of fate had given a flying start to man's technology, but when he reached the other planets, he found to his surprise and disappointment that for many of his most vital needs he must still depend on the home world.

  Earth is the densest of all the planets, only Venus approach­ing it in this respect. But Venus has no satellite, and the Earth-Moon system forms a double world of a type found nowhere else among the planets. Its mode of formation is a mystery still, but it is known that when Earth was molten the Moon circled at only a fraction of its present distance, and raised gigantic tides in the plastic substance of its companion.

  As a result of these internal tides, the crust of the Earth is rich in heavy metals—far richer than that of any other of the planets: They hoard their wealth far down within their unreachable cores, protected by pressures and temperatures that guard them from man's depredations. So as human civilization spread outward from Earth, the drain on the mother world's dwindling resources steadily increased.

  The light elements existed on the other planets in unlimited amounts, but such essential metals as mercury, lead, uranium, platinum, thorium and tungsten were almost unobtainable. For many of them no substitutes existed; their large-scale synthesis was impractical, despite two centuries of effort—and modern technology could not survive without them.

  It was an unfortunate situation, and a very galling one for the independent republics on Mars, Venus and the larger satel­lites, which had now united to form the Federation. It kept them dependent upon Earth, and prevented their expansion toward the frontiers of the solar system. Though they had searched among the asteroids and moons, among the rubble left over when the worlds were formed, they had found little but worth­less rock and ice. They must go cap in hand to the mother planet for almost every gram of a dozen metals that were more precious than gold.

  That in itself might not have been serious, had not Earth grown steadily more jealous of its offspring during the two hundred years since the dawn of space travel. It was, thought

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  Sadler, an old, old story, perhaps its classic example being the case of England and the American colonies. It has been truly said that history never repeats itself, but historical situations recur. The men who governed Earth were far more intelligent than George the Third; nevertheless, they were beginning to show the same reactions as that unfortunate monarch.

  There were excuses on both sides; there always are. Earth was tired; it had spent itself, sending out its best blood to the stars. It saw power slipping from its hands, and knew that it had already lost the future. Why should it speed the process by giving to its rivals the tools they needed ?

  The Federation, on the other hand, looked back with a kind of affectionate contempt upon the world from which it had sprung. It had lured to Mars, Venus and the satellites of the giant planets some of the finest intellects and the most adven­turous spirits of the human race. Here was the new frontier, one that would expand forever toward the stars. It was the great­est physical challenge mankind had ever faced, it could be met only by supreme scientific skill and unyielding determination. These were virtues no longer essential on Earth; the fact that Earth was well aware of it did nothing to ease the situation.

  All this might lead to discord and interplanetary invective, but it could never lead to violence. Some other factor was need­ed to produce that, some final spark which would set off an explosion echoing round the solar system.

  That spark had now been struck. The world did not know it yet, and Sadler himself had been equally ignorant a short six months ago. Central Intelligence, the shadowy organization of which he was now a reluctant member, had been working night and day to neutralize the damage. A mathematical thesis entitled "A Quantitative Theory of the Formation of the Lunar Surface Features" did not look like the sort of thing that could start a war—but an equally theoretical paper by a certain Albert Einstein had once ended one.

  The paper had been written about two years ago by Profes
­sor Roland Phillips, a peaceable Oxford cosmologist with no interest in politics. He had submitted it to the Royal Astro­nomical Society, and it was now becoming a little difficult to give him a satisfactory explanation of the delay in publication.

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  Unfortunately—and this was the fact that caused great dis­tress to Central Intelligence—Professor Phillips had innocently sent copies to his colleagues on Mars and Venus. Desperate at­tempts had been made to intercept them, but in vain. By now, the Federation must know that the Moon was not as im­poverished a world as had been believed for two hundred years.

  There was no way of calling back knowledge that had leaked out, but there were other things about the Moon which it was now equally important that the Federation should not learn. Yet somehow it was learning them; somehow, information was leaking across space from Earth to Moon, and then out to the planets.

  When there's a leak in the house, thought Sadler, you send for the plumber. But how do you deal with a leak which you can't see—and which may be anywhere on the surface of a world as large as Africa?

  He still knew very little about the scope, size and methods of Central Intelligence—and still resented, futile though that was, the way in which his private life had been disrupted. By training, he was precisely what he pretended to be—an ac­countant. Six months ago, for reasons which had not been explained and which he probably never would discover, he had been interviewed and offered an unspecified job. His acceptance was quite voluntary; it was merely made clear to him that he had better not refuse. Since then he had spent most of his time under hypnosis, being pumped full of the most various kinds of information and living a monastic life in an obscure corner of Canada. (At least, he thought it was Canada, but it might equally well have been Greenland or Siberia.) Now he was here on the Moon, a minor pawn in a game of interplanetary chess. He would be very glad when the whole frustrating ex­perience was over. It seemed quite incredible to him that anyone would ever voluntarily become a secret agent. Only very im­mature and unbalanced individuals could get any satisfaction from such frankly uncivilized behavior.

  There were a few compensations. In the ordinary way, he would never have had a chance of going to the Moon, and the experience he was gathering now might be a real asset in later years. Sadler always tried to take the long view, particularly

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  when he was depressed by the current situation. And the situa­tion, both on the personal and interplanetary levels, was de­pressing enough.

  The safety of Earth was quite a responsibility, but it was really too big for one man to worry about. Whatever reason said, the vast imponderables of planetary politics were less of a burden than the little cares of everyday life. To a cosmic ob­server, it might have seemed very quaint that Sadler's greatest worry concerned one solitary human being. Would Jeannette ever forgive him, he wondered, for being away on their wed­ding anniversary? At least she would expect him to call her, and that was the one thing he dared not do. As far as his wife and his friends were concerned, he was still on Earth. There was no way of calling from the Moon without revealing his location, for the two-and-a-half-second time-lag would betray him at once.

  Central Intelligence could fix many things, but it could hardly speed up radio waves. It could deliver his anniversary present on time, as it had promised—but it couldn't tell Jeannette when he would be home again.

  And it couldn't change the fact that, to conceal his where­abouts, he had had to lie to his wife in the sacred name of Security.

  Chapter III

  when conrad wheeler had finished comparing the tapes, he got up from his chair and walked three times round the room. From the way he moved, an old hand could have told that Wheeler was a relative newcomer to the Moon. He had been with the Observatory staff for just six months, and still overcompensated for the fractional gravity in which he now lived. There was a jerkiness about his movements that contrasted with the smooth, almost slow-motion gait of his colleagues. Some of this abruptness was due to his own temperament, his lack of discipline, and quickness at jumping

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  to conclusions. It was that temperament he was now trying to guard against.

  He had made mistakes before—but this time, surely, there could be no doubt. The facts were undisputed, the calculation trivial—the answer awe-inspiring. Far out in the depths of space, a star had exploded with unimaginable violence. Wheeler looked at the figures he had jotted down, checked them for the tenth time, and reached for the phone.

  Sid Jamieson was not pleased at the interruption. "Is it really important?" he queried. "I'm in the darkroom, doing some stuff for Old Mole. I'll have to wait until these plates are washing, anyway."

  "How long will that take?"

  "Oh, maybe five minutes. Then I've got some more to do."

  "I think this is important. It'll only take a moment. I'm up in Instrumentation 5."

  Jamieson was still wiping developer from his hands when he arrived. After more than three hundred years, certain aspects of photography were quite unchanged. Wheeler, who thought that everything could be done by electronics, regarded many of his older friend's activities as survivals from the age of alchemy.

  "Well?" said Jamieson, as usual wasting no words.

  Wheeler pointed to the punched tape lying on the desk.

  "I was doing the routine check of the magnitude integrator. It's found something."

  "It's always doing that," snorted Jamieson. "Every time anyone sneezes in the Observatory, it thinks it's discovered a new planet."

  There were solid grounds for Jamieson's skepticism. The integrator was a tricky instrument, easily misled, and many astronomers thought it more trouble than it was worth. But it happened to be one of the director's pet projects, so there was no hope of doing anything about it until there was a change of administration. Maclaurin had invented it himself, back in the days when he had had time to do some practical astronomy. An automatic watchdog of the skies, it would wait patiently for years until a new star—a "nova"—blazed in the heavens. Then it would ring a bell and start calling for attention.

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  "Look," said Wheeler, "there's the record. Don't just take my word for it."

  Jamieson ran the tape through the converter, copied down the figures and did a quick calculation. Wheeler smiled in satisfaction and relief as his friend's jaw dropped.

  "Thirteen magnitudes in twenty-four hours! Wow!"

  "I made it thirteen point four, but that's good enough. For my money, it's a supernova. And a close one."

  The two young astronomers looked at each other in thought­ful silence. Then Jamieson remarked:

  "This is too good to be true. Don't start telling everybody about it until we're quite sure. Let's get its spectrum first, and treat it as an ordinary nova until then."

  There was a dreamy look in Wheeler's eyes.

  "When was the last supernova in our galaxy?"

  "That was Tycho's star—no it wasn't—there was one a bit later, round about 1600."

  "Anyway, it's been a long time. This ought to get me on good terms with the director again."

  "Perhaps," said Jamieson dryly. "It would just about take a supernova to do that. I'll go and get the spectrograph ready while you put out the report. We mustn't be greedy; the other observatories will want to get into the act." He looked at the integrator, which had returned to its patient searching of the sky. "I guess you've paid for yourself," he added, "even if you never find anything again except spaceship navigation lights."

  Sadler heard the news without particular excitement in the Common Room an hour later. He was too preoccupied with his own problems and the mountain of work which faced him to take much notice of the Observatory's routine program, even when he fully understood it. Secretary Wagnall, however, quickly made it clear that this was very far from being a routine matter.

  "Here's something to put on your balance sheet," he said cheerfully. "It's the biggest astronomical discovery for years. Come
up to the roof."

  Sadler dropped the trenchant editorial in Time Interplane­tary which he had been reading with growing annoyance. The magazine fell with that dreamlike slowness he had not yet

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  grown accustomed to, and he followed Wagnall to the elevator.

  They rose past the residential level, past Administration, past Power and Transport, and emerged into one of the small ob­servation domes. The plastic bubble was scarcely ten meters across, and the awnings that shielded it during the lunar day had been rolled back. Wagnall switched off the internal lights, and they stood looking up at the stars and the waxing Earth. Sadler had been here several times before; he knew no better cure for mental fatigue.

  A quarter of a kilometer away the great framework of the largest telescope ever built by man was pointing steadily toward a spot in the southern sky. Sadler knew that it was looking at no stars that his eyes could see—at no stars, indeed, that be­longed to this universe. It would be probing the limits of space, a billion light-years from home.