Raindrop Read online

  Bresnahan thought for a moment.

  “All right,” he said. “I’m in no position to make either a decent collection or a decent report, as things stand. Let’s go back to the station, tell him what’s what, and let him decide what he does want. Maybe it’s just a case of a new boss not knowing the ropes and trying to find out.”

  “I’d question that, somehow, but can’t think of anything better to do. Come on.”

  Silbert swam back toward the lock from which they had emerged only a few minutes before. They had drifted far enough from it in that time so that its details had faded to a greenish blur, but there was no trouble locating the big cylinder. The door they had used was still open.

  Silbert pulled himself through, lent Bresnahan a hand in doing likewise, closed the portal, and started a small pump. The pressure head was only the quarter atmosphere maintained by the tension of the alga skin, and emptying the chamber of water did not take long. The principal delay was caused by Bresnahan’s failure to stand perfectly still; with gravity only a little over one five-thousandths Earth normal, it didn’t take much disturbance to slosh some water away from the bottom of the lock where the pump intake was located.

  Silbert waited for some of it to settle, but lacked the patience to wait for it all. When he opened the door into the larger lock chamber the men were accompanied through it by several large globules of boiling liquid.

  “Wasteful, but helps a bit,” remarked the spaceman as he opened the outside portal and the two were wafted through it by the escaping vapor. “Watch out—hang on there. You don’t have escape velocity, but you’d be quite a while getting back to the surface if you let yourself blow away.” He seized a convenient limb of Bresnahan’s space armor as the younger man drifted by, and since he was well anchored himself to the top rung of the ladder was able to arrest the other’s flight. Carefully they stepped away from the hatch, Silbert touching the closing button with one toe as he passed it, and looked for the orbiting station.

  This, of course, was directly overhead. The same temptation which Bresnahan had felt earlier to make a jump for it came back with some force; but Silbert had a safer technique.

  He took a small tube equipped with peep-sights from the equipment clip at his side and aimed it very carefully at the projecting hub of the wheel-shaped station—the only part of the hub visible, since the station’s equator was parallel to that of Raindrop and the structure was therefore edge-on to them. A bright yellow glow from the target produced a grunt of satisfaction from Silbert, and he fingered a button on the tube. The laser beam, invisible in the surrounding vacuum, flicked on and of! in a precisely timed signal pattern which was reported faithfully by the source-return mirror at the target. Another response was almost as quick.

  III

  A faintly glowing object emerged from the hub and drifted rapidly toward Raindrop, though not quite toward the men. Its details were not clear at first, but as it approached it began to look more and more like a luminous cobweb.

  “Just a lattice of thin rods, doped with luminous paint for spotting and launched from the station by a spring gun,” explained Silbert. “The line connecting it with the station isn’t painted, and is just long enough to stop the grid about fifty feet from the water. It’s launched with a small backward component relative to the station’s orbit, and when the line stops it it will drift toward us. Jump for it when I give the word; you can’t miss.”

  Bresnahan was not as certain about the last statement as his companion seemed to be, but braced himself anyway. As the glowing spiderweb approached, however, he saw it was over a hundred feet across and realized that even he could jump straight enough to make contact. When Silbert gave the word, he sprang without hesitation.

  He had the usual moment of nausea and disorientation as he crossed the few yards to his target. Lacking experience, he had not “balanced” his jump perfectly and as a result made a couple of somersaults en route. This caused him to lose track of his visual reference points, and with gravity already lacking he suffered the moment of near-panic which so many student pilots had experienced before him. Contact with one of the thin rods restored him, however; he gripped it frantically and was himself again.

  Silbert arrived a split second later and took charge of the remaining maneuvers. These consisted of collapsing the “spiderweb”—a matter of half a minute, in spite of its apparent complexity, because of the ingenuity of its jointing—and then starting his companion hand-over-hand along the nearly invisible cord leading back to the station. The climb called for more coordination than was at first evident; the spaceman had to catch his less experienced companion twice as the latter missed his grip for the line.

  Had Silbert been going first the situation might have been serious. As it was, an extra tug on the rope enabled him to catch up each time with the helpless victim of basic physics. After the second accident, the guide spoke.

  “All right, don’t climb any more. We’re going a little too fast as it is. Just hold onto the rope now and to me when I give the word. The closing maneuver is a bit tricky, and it wouldn’t be practical to try to teach you the tricks on the spot and first time around.”

  Silbert did have quite a problem. The initial velocities of the two men in their jumps for the spiderweb had not, of course, been the correct ones to intercept the station—if it had been practical to count on their being so, the web would have been superfluous. The web’s own mass was less than fifty pounds, which had not done much to the sum of those vectors as it absorbed its share of the men’s momentum. Consequently, the men had an angular velocity with respect to the station, and they were approaching the latter.

  To a seventeenth century mathematician, conservation of angular momentum may have been an abstract concept, but to Silbert it was an item of very real, practical, everyday experience—just as the orbit of a comet is little more than a set of numbers to an astronomer while the orbit of a baseball is something quite different to an outfielder. The problem this time was even worse than usual, partly because of Bresnahan’s mass and still more because of his inexperience.

  As the two approached the station their sidewise motion became evident even to Bresnahan. He judged that they would strike near the rim of the spinning structure, if they hit it at all, but Silbert had other ideas.

  Changing the direction of the spin axis by landing at the hub was one thing—a very minor one. Changing the rate of spin by meeting the edge could be a major nuisance, since much of the apparatus inside was built on and for Earth and had Earth’s gravity taken for granted in its operation. Silbert therefore had no intention of making contact anywhere but at one of the “poles” of station. He was rather in the situation of a yo-yo whose string is winding up on the operator’s finger; but he could exercise a little control by climbing as rapidly as possible “up” the cord toward the structure or allowing himself to slide “down” away from it.

  He had had plenty of experience, but he was several minutes playing them into a final collision with the entry valve, so close to the center of mass of the station that the impact could produce only a tiny precession effect. Most of its result was a change in the wheel’s orbit about Raindrop, and the whole maneuver had taken such a small fraction of an orbital period that this effect nearly offset that produced when they had started up the rope.

  “Every so often,” remarked the spaceman as he opened the air lock, “we have to make a small correction in the station orbit; the disturbances set up by entering and leaving get it out of step with Raindrop’s rotation. Sometimes I wonder whether it’s worth the trouble to keep the two synchronized.”

  “If the station drifted very far from the lock below, you’d have to jump from the liquid surface, which might be awkward,” pointed out the younger man as the closing hatch cut off the starlight.

  “That’s true,” admitted the other as he snapped a switch and air started hissing into the small lock chamber. “I suppose there’s something to be said for tradition at that. There’
s the safety light”—as a green spot suddenly glowed on the wall—“so you can open up your suit whenever you like. Lockers are in the next room. But you arrived through this lock, didn’t you?”

  “Right. I know my way from here.”

  Five minutes later the two men, divested of spacesuits, had “descended” to the rim of the station where weight was normal. Most of this part of the structure was devoted to living space which had never been used, though there were laboratory and communication rooms as well. The living space had been explained to Bresnahan, when he first saw it, why Silbert was willing to spend three quarters of his time alone at a rather boring job a hundred thousand miles from the nearest company. Earth was badly crowded; not one man in a million had either as much space or as much privacy.

  Weisanen and his wife had taken over a set of equally sumptuous rooms on the opposite side of the rim, and had been in the process of setting up housekeeping when the two employees had descended to Raindrop’s surface a short time before. This had been less than an hour after their arrival with Bresnahan on the shuttle from Earth; Weisanen had wasted no time in issuing his first orders. The two men were prepared to find every sign of disorder when the door to the “headquarters” section opened in response to Silbert’s touch on the annunciator, but they had reckoned without Mrs. Weisanen.

  At their employer’s invitation, they entered a room which might have been lived in for a year instead of an hour. The furniture was good, comfortable, well arranged, and present in quantity which would have meant a visible bulge in a nation’s space research budget just for the fuel to lift it away from the earth in the chemical fuel days.

  Either the Weisanens felt strongly about maintaining the home atmosphere even when visiting, or they planned to stay on the station for quite a while.

  The official himself was surprisingly young, according to both Bresnahan’s and Silbert’s preconceived notions of a magnate. He could hardly have been thirty, and might have been five years younger. He matched Bresnahan’s five feet ten of height and looked about the same weight; but while the computerman regarded himself as being in good physical shape, he had to admit the other was far more muscular. Even Silbert’s six feet five of height and far from insignificant frame seemed somehow inadequate beside Weisanen’s.

  “Come in, gentlemen. We felt your return a few minutes ago! I take it you have something to report, Mr. Bresnahan. We did not expect you back quite so soon.” Weisanen drew further back from the door and waved the others past him. “What can you tell us?” He closed the door and indicated armchairs. Bresnahan remained on his feet, uneasy at the incompleteness of his report; Silbert sank into the nearest chair. The official also remained standing. “Well, Mr. Bresnahan?”

  “I have little—practically nothing—to report, as far as detailed, quantitative information is concerned,” the computerman took the plunge.

  “We stayed inside the Raindrop only a few minutes, and it was evident that most of the detailed search for life specimens would have to be made with a microscope. I hadn’t planned the trip at all effectively. I now understand that there is plankton-collecting apparatus here which Mr. Silbert uses regularly and which should have been taken along if I were to get anything worth showing to you.”

  Weisanen’s face showed no change in its expression of courteous interest. “That is quite all right,” he said. “I should have made clear that I wanted, not a detailed biological report, but a physical description by a non-specialist of what it is like subjectively down there. I should imagine that you received an adequate impression even during your short stay. Can you give such a description?”

  Bresnahan’s worried expression disappeared, and he nodded affirmatively.

  “Yes, sir. I’m not a literary expert, but I can tell what I saw.”

  “Good. One moment, please,” Weisanen turned toward another door and raised his voice. “Brenda, will you come in here, please? You should hear this.”

  Silbert got to his feet just as the woman entered, and both men acknowledged her greeting.

  Brenda Weisanen was a full head shorter than her husband.

  She was wearing a robe of the sort which might have been seen on any housewife expecting company; neither man was competent to guess whether it was worth fifty dollars or ten times that. The garment tended to focus attention on her face, which would have received it anyway. Her hair and eyebrows were jet black, the eyes themselves gray, and rounded cheeks and chin made the features look almost childish, though she was actually little younger than her husband. She seated herself promptly, saying no more than convention demanded, and the men followed suit.

  “Please go on, Mr. Bresnahan,” Weisanen said. “My wife and I are both greatly interested, for reasons which will be clear shortly.”

  Bresnahan had a good visual memory, and it was easy for him to comply. He gave a good verbal picture of the greenish, sunlit haze that had surrounded him—sunlight differing from that seen under an Earthly lake, which ripples and dances as the waves above refract it. He spoke of the silence, which had moved him to keep talking because it was the “quietest” silence he had known, and “didn’t sound right.”

  He was interrupted by Silbert at this point; the spaceman explained that Raindrop was not always that quiet. Even a grain-of-dust meteoroid striking the skin set up a shock wave audible throughout the great sphere; and if one were close enough to the site of collision, the hiss of water boiling out through the hole for the minute or two needed for the skin to heal could also be heard. It was rather unusual to be able to spend even the short time they had just had inside the satellite without hearing either of these sounds.

  Bresnahan nodded thanks as the other fell silent, and took up the thread of his own description once more. He closed with the only real feature he had seen to describe—the weed-grown cylinder of the water-to-space lock, hanging in greenish emptiness above the dead-black void which reached down to Raindrop’s core. He was almost poetical in spots.

  The Weisanens listened in flattering silence until he had done, and remained silent for some seconds thereafter. Then the man spoke.

  “Thank you, Mr. Bresnahan. That was just what we wanted.” He turned to his wife. “How does that sound to you, dear?”

  The dark head nodded slowly, its gray eyes fastened on some point far beyond the metal walls.

  “It’s fascinating,” she said slowly. “Not just the way we pictured it, of course, and there will be changes anyway, but certainly worth seeing. Of course they didn’t go down to the core, and wouldn’t have seen much if they had. I suppose there is no life, and certainly no natural light, down there.”

  “There is life,” replied Silbert. “Non-photosynthetic, of course, but bacteria and larger fungi which live on organic matter swept there from the sunlit parts. I don’t know whether anything is actually growing on the core, since I’ve never gone in that far, but free-floating varieties get carried up to my nets. A good many of those have gone to Earth, along with their descriptions, in my regular reports.”

  “I know. I’ve read those reports very carefully, Mr. Silbert,” replied Weisanen.

  “Just the same, one of our first jobs must be to survey that core,” his wife said thoughtfully. “Much of what has to be done will depend on conditions down there.”

  “Right.” Her husband stood up. “We thank you gentlemen for your word pictures; they have helped a lot. I’m not yet sure of the relation between your station time and that of the Terrestrial time zones, but I have the impression that it’s quite late in the working day. Tomorrow we will all visit Raindrop and make a very thorough and more technical examination—my wife and I doing the work, Mr. Bresnahan assisting us, and Mr. Silbert guiding. Until then—it has been a pleasure, gentlemen.”

  Bresnahan took the hint and got to his feet, but Silbert hesitated. There was a troubled expression on his face, but he seemed unable or unwilling to speak. Weisanen noticed it.

  “What’s the matter, Mr. Silbert? Is there some
reason why Raindrop’s owners, or their representatives, shouldn’t look it over closely? I realize that you are virtually the only person to visit it in the last three years, but I assure you that your job is in no danger.”

  Silbert’s face cleared a trifle.

  “It isn’t that,” he said slowly. “I know you’re the boss, and I wasn’t worried about my job anyway. There’s just one point—of course you may know all about it, but I’d rather be safe, and embarrassed, than responsible for something unfortunate later on. I don’t mean to butt into anyone’s private business, but Raindrop is essentially weightless.”

  “I know that.”

  “Do you also know that unless you are quite certain that Mrs. Weisanen is not pregnant, she should not expose herself to weightlessness for more than a few minutes at a time?”

  Both Weisanens smiled.

  “We know, thank you, Mr. Silbert. We will see you tomorrow, in spacesuits, at the big cargo lock. There is much equipment to be taken down to Raindrop.”

  IV

  That closing remark proved to be no exaggeration.

  As the four began moving articles through the lock the next morning, Silbert decided at first that the Weisanen’s furniture had been a very minor item in the load brought up from Earth the day before, and wondered why it had been brought into the station at all if it were to be transferred to Raindrop so soon. Then he began to realize that most of the material he was moving had been around much longer. It had come up bit by bit on the regular supply shuttle over a period of several months. Evidently whatever was going on represented long and careful planning—and furthermore, whatever was going on represented a major change from the original plans for Raindrop.