We sat again in our chairs before the control-panel, Whitely to my left, gazing through the big window before us ... soaring past the limits of Earth's atmosphere.
We sat again in our chairs before the control-panel, Whitely to my left, gazing through the big window before us ... soaring past the limits of Earth's atmosphere.
We sat again in our chairs before the control-panel, Whitely to my left, gazing through the big window before us ... soaring past the limits of Earth's atmosphere.
CHAPTER IV
Through Planetary Perils
"Mars ahead and to the left—we ought to pass it in three more hours!"
At my words Marlin nodded. "We won't be bothered much by the pull of Mars," he said.
We sat again in our chairs before the control-panel, Whitely to my left, gazing through the big window before us. Ahead and above and all around us there stretched a great panorama, stunning in its brilliance, the vast panorama of the starry heavens as seen from the airless interplanetary void. Blazing in their true brilliant colors on all sides of us, the hosts of stars were like jewels of light set in the black firmament. And as our flier throbbed on through the great gulf of empty space at terrific speed, its acceleration still pressing us down somewhat in our chairs, we could see now amid the flaming stars dead ahead the far green spot of light that was Neptune, our goal, visible now to our unaided eyes in the clearness of empty space. Nearer toward us and to the right Jupiter was like a brilliant little disk of white light, now, the four white points of its greater moons visible about it. To the left, too, yellow Saturn shone much brighter, while nearer toward us on the left, almost beside us, hung the dull-red little shield, white-capped at its poles, that was Mars.
Behind us, by this time, Earth had dwindled to a steady spot of bluish light that was like a tiny moon, the smaller spot that was Earth's moon gleaming near it. Hardly visible as Earth was in the blinding glare of the great sun that beat upon us from behind, its great corona and mighty prominences appalling in their splendor, yet it was visible enough to show how far from it out into the void our flier had already flashed. For forty-eight hours indeed, our great space-flier had rushed outward at a speed that had already reached over a million miles an hour, and that was steadily mounting still beneath the terrific reaction of our great force-ray, that great pale ray only visible at its ray-opening source, that was stabbing back with colossal power and by the reaction of that push sending us hurtling on at greater and greater speed. Out and out we had flashed, Randall and I relieving each other every four hours at the controls, and already now had almost reached the orbit of Mars, more than fifty million miles outward. Now, as Marlin and Whitely and I gazed out toward it, the red disk of Mars itself was but several million miles from us, to the left and ahead.
Gazing toward it, we could see clearly the great ice caps of the poles of Mars, brilliant white upon its dull red sphere, and could see clearly also the long straight markings upon it, a network of inter-connecting lines, that for long had been the subject of discussion and disputation among Earth's astronomers. It was with fascinated eyes that we gazed toward the red planet as we drew nearer to it, and now Randall had joined us, moving with great efforts against the acceleration-pressure inside the flier. Marlin, though, had turned the telescope by that time toward the crimson planet, was gazing intently toward it. Minutes he gazed before he straightened, shaking his head.
"There can be no doubt that those canals—those lines—are the work of intelligent creatures," he said. "I saw great geometrical forms that seemed structures of some sort, but our space-flier is moving at such tremendous speed that it's all but impossible to get a clear focus on the planet in the telescope."
We stared toward the red disk and its dark markings. "If we could but stop there—who knows what wonders Mars may hold, what science——," Whitely mused.
Marlin nodded thoughtfully. "Neptune's our goal, and we can't stop for Mars now, whatever may be there. But if we succeed in our great task, if Earth is saved from this doom that Neptune's beings are loosing on the solar system, we'll come yet to Mars—and to all the others."
"In the meantime," I told them, "Mars is pulling our flier out of its course more and more. I thought our speed would take us by it, but it seems we'll have to use another ray."
For even as we had gazed toward the red planet, I had noted from the dials before Randall that the gravitational pull of Mars upon our space-flier from the left was becoming more and more powerful as we approached it to pass it, and that it was pulling us slowly toward it out of our course toward Neptune. Our deviation to the left was not great as yet, but even the slightest deviation we could not permit, since not only must we head as straight toward Neptune as possible to save time, but it was necessary that we avoid also the colossal force-ray which was stabbing from Neptune across the solar system toward the sun's edge, which was turning that sun ever faster. That great force-ray, invisible to us, but lying away to our left, we knew; would mean death for us if we blundered into it, would drive our flier with titanic force and speed straight into the sun!
So that now, as our space-flier moved nearer and nearer toward the distant red shield of Mars, pulled farther and farther out of its path toward Neptune, I swiftly manipulated the ray-direction dials on the control-panel, then grasped and threw open another of the six ray-opening switches. At once there leaped from our racing flier's side, from one of its ray-openings there, a second great force-ray like that which stabbed from the flier's rear toward Earth. This second ray, though, vaguely visible like the first at its source, but fading into invisibility in space, shot out toward the red sphere of Mars, away to our left. And in a moment more, as that light-swift ray reached Mars and pressed against the red planet with all its force, our flier was being pushed away from it, was being pushed back to the right, back into its original line of flight! Thus we hurtled on, the great rear ray of the flier pushing back with terrific force and sending us hurtling on through space, while the side-ray, striking Mars with lesser force, was sufficient to keep us out of the red planet's grip as we flashed onward.
Within a few hours more Mars was behind us, its red sphere fading rapidly into a crimson spot of light to the left and behind. The planet's two tiny moons, Phobos and Deimos, we had not yet seen despite our nearness to it, but it was with something of regret that we saw the crimson world and all the strange mysteries that we felt existed upon it, dropping behind us. Neptune alone, as Marlin had said, was our goal, and on toward its calm green light-dot we were rushing. I turned off our side-ray, therefore, which was no longer needed to counteract Mars's pull, and we gave all our attention to the panorama ahead. Save for Neptune's distant green dot, the only planets now visible amid the brilliant hosts of stars before us were Jupiter and Saturn. Saturn was shining ever more brightly to the left, its strange ring-formation already becoming visible to our eyes. But it was Jupiter that now dominated all the scene before us, his mighty sphere, its oblateness plainly visible, moving in majestic white splendor at the center of his four great moons.
It was not the planets ahead that held my attention now, though, as our throbbing flier raced onward, Mars and its orbit dropping behind. "The asteroids!" I exclaimed. "We're almost into their region now—will be among them soon!"
"And they're one of the greatest perils we'll encounter," Marlin said. "Hold ready to the controls, Hunt, for if we crash into one it means our end—the end of Earth's chance!"
I did not need his admonition, though, to make me tense my hands upon the control-switches, gazing intently forward. I knew we were now passing into one of the most dangerous regions of all the solar system—that great belt of whirling asteroids that lies between the orbits of Mars and Jupiter. More than a thousand in number, ranging from the great sphere of Ceres, 480 miles in diameter, down to the smallest asteroids of a few miles diameter only, they whirled there around the sun between the four inner and four outer planets, their orbits a maze of interwoven circles and ellipses. The greater part of them were so small, indeed, that at the tremendous speed with which our space-flier was flashing on they could be seen only in the moment that we rushed upon them. And yet in that moment we must whirl aside from any before us, since otherwise, pulled closer by the asteroid's own gravitational power, we would infallibly crash into it and meet our doom.
Steadily, therefore, we watched now, as hour followed hour, as our flier rushed on with speed still slowly mounting, traveling finally at more than two million miles an hour. The throb of its four great generators was as steady as ever, and the pressure of its decreasing acceleration still weighed upon us, but already we had become accustomed to that pressure. So now while I gazed forth with Marlin ahead, Randall was at one of the right windows and Whitely at one of the left, keeping a similar watch. And it was Randall, a few hours later, who sighted the first of the asteroids. He uttered a swift exclamation, pointing to the right and ahead, and as we looked there we saw a small bright point in the blackness of space, a point that with the swiftness of lightning was expanding into a great, dull-gleaming sphere, rushing toward us and drawing our space-flier toward itself! A moment we saw it rushing thus toward us, a great sphere of barren, jagged rock, airless and waterless, turning slowly in space; and then it was looming gigantic just beside us!
In that moment, though, my hand had jerked open one of the six levers before me, and instantaneously had shot from our flier's side a great force-ray toward that looming asteroid beside us. The next instant the asteroid's giant rock sphere seemed to flash away from us and disappear with immense speed, but in reality it was our flier that had been pushed away from the asteroid with colossal force by the force-ray I had shot toward it! Instantly I snapped off that ray, the space-flier flashing on in its straight course as formerly. And as I did so Marlin turned for a moment from his watch at the window toward me, gestured to the right toward the asteroid from which we had so narrowly escaped. In the moment we had seen it, I had estimated that one to be a hundred miles or more in diameter.
"That would be Vesta," he said, "one of the largest. It's the only one of that size in this part of their region now."
"Large or small, I want to see no more of them that close," I said. "Especially when——"
"Hunt!—look—to the left!"
It was Whitely who had cried out to me, and as I whirled to gaze in the direction in which he pointed, I noticed another swift-expanding sphere of rock, another gleaming asteroid rushing obliquely toward us! Not as great in size as the first one, but it was approaching us with terrific speed, and even as I jerked open one of the switches before me, sent a force-ray stabbing from the flier toward the rushing asteroid, it seemed that that asteroid was touching us, its great rocky surface shutting out all the firmament as it towered there beside us! My ray, though, had been shot forth just in time, had whirled us aside from the onrushing monster's path at the last moment, and as we reeled on, it too had vanished behind us. But now I had glimpsed two larger ones ahead and to the left, and was jerking the flier away from them also.
Still we were racing onward, our great space-flier hurtling on and on through that asteroid-filled region, escaping those great rushing spheres of death, sometimes by the narrowest of margins. Hour upon hour, keeping our sleepless watch at the flier's windows, we flashed on, its colossal speed still mounting as more and more of our generators' power was turned into the great rear force-ray that pressed back towards Earth and that shot us outward. By that time Earth had become but a bright white star behind us, the sun's size and brilliance decreased by a third or more already. But it was not backward we were gazing; it was ahead. We were striving with all our powers to avoid the asteroids that hurtled about us. We saw, once or twice, families or groups of those asteroids moving together, sometimes dozens together, and strove to give these a wide berth. On we raced, veering now to this side and now to that, with Jupiter looming ever greater ahead and to the right as we approached the end of the asteroidal belt. But it was as we approached its end, at last, that our greatest peril came suddenly upon us. For I had shot the space-flier sidewise with terrific speed to avoid an onrushing small asteroid, and the next moment when it slowed its sidewise rush, found that I had unwittingly shot it into the very heart of a great family of full two-score of the little planets!
All about us in that moment it seemed were asteroids, gleaming spheres at the very center of whose swarm our flier flashed, and into which by some miracle our sidewise rush had projected us, unharmed! I heard the hoarse cries of Marlin and Randall beside me, in that moment, the shout of Whitely, and knew that only another miracle could ever take us out of that swarm unharmed. Already, in that split-second, three of them were looming great to our right, another one ahead and to the left, and to escape one was to crash upon another. There was no time for thought, no time for aught save a lightning-like decision, and in that fractional instant I had made that decision, and as our flier hurtled through the great swarm of asteroids, had shot out its great force-rays to right and left and above and beneath us, driving out in all directions from our flier as it flashed through the great swarm!
There was an instant in which the space-flier seemed to be jerking and flashing in wild aimless flight amid that swarm, as its striking force-rays pushed it now to one side and now to another, away from the asteroids about us. Were two of those rays to strike asteroids in opposite directions, balancing each other, the space-flier, instead of being pushed aside, would be crumpled to instant annihilation between the push of the two great rays, I knew, and we expected nothing but annihilation in that mad moment as we shot on. But after reeling to right and left with dizzy speed for a crazy instant, the asteroids of the swarm had vanished suddenly from about us as we shot out of that swarm! We had escaped, had escaped a death that for the moment had seemed certain to all of us, and that I had managed to evade by instinct and luck rather than by reason.
There was an instant in which the space-flier seemed to be jerking and flashing in wild aimless flight amid that swarm, as its striking force-rays pushed it now to one side and now to another, away from the asteroids about us.
There was an instant in which the space-flier seemed to be jerking and flashing in wild aimless flight amid that swarm, as its striking force-rays pushed it now to one side and now to another, away from the asteroids about us.
There was an instant in which the space-flier seemed to be jerking and flashing in wild aimless flight amid that swarm, as its striking force-rays pushed it now to one side and now to another, away from the asteroids about us.
"Close enough—that!" I exclaimed as we raced forward through the void on our straight course once more. "If we meet many more swarms like that, our chances of getting to Neptune are small!"
Marlin shook his head. "We seemed gone that time," he admitted. "But I think we're almost out of the asteroidal region now—we should be crossing Jupiter's orbit in another twenty-four hours."
"The space-flier's doing four million miles an hour now," I said, glancing over at the space-speed dial. "We're beginning to feel Jupiter's pull a little already."
We were, indeed, already deviating a little to the right from our straight course in answer to the gravitational pull of the tremendous mass of Jupiter, looming ever greater now ahead and to the right. We were to pass it by some fifteen million miles, more than twice the distance at which we had passed Mars, but the colossal planet, larger than all the other planets of the sun together, was already attracting us strongly despite our terrific speed and momentum. For the time being, though, we gave it but scant attention, concentrating our attention, as we did, upon the watch for farther asteroids, since we had not yet emerged from their great belt between the orbits of Mars and Jupiter. Sleepy and weary as we were from our hours upon the watch, we dared not relax from that watch, and so Whitely and Marlin and Randall still kept up their constant survey of the surrounding void, while I held the flashing space-flier's controls, turning more and more of our generators' power into the great force-ray that was hurtling us on. We had not dared to use the generators' power too swiftly upon our start, lest the too great acceleration kill us, despite our shock-absorbing apparatus. But steadily our speed, already colossal, was mounting, and we were racing on through the gulf toward the distant green spot of light that was Neptune.
On and on in those hours we shot, until it seemed to me, seated there at the controls, that always we had flashed thus through endless realms of tenantless space. For now but a few asteroids were sighted by our watching eyes, and the eventlessness and strange tension of our rush onward through space made it seem like a strange flight in some unending dream. On and on, with Marlin and Randall and Whitely watching ceaselessly about me, on with the throbbing of our generators beating in my ears in unhalting rhythm. Behind us Earth's bright white star was steadily growing smaller, but still our great force-ray, stabbing ceaselessly back from our flier with colossal power, was sending us racing on faster and faster with its huge reacting force. But our start from Earth, days, hours, before, the great mission upon which we were speeding outward to Neptune, these things I had forgotten, almost, as the dream-like quality of our onward flight gripped me.
But as we raced still onward, as Jupiter's mighty sphere loomed greater and greater to the right ahead of us, my bemused faculties were shaken into wakefulness by the necessities of our situation. By that time we had passed out of the dangerous asteroidal region, and with their watch no longer necessary Whitely and Randall, after preparing for us all a quick hot meal from the thermos-cans in which all our food supplies were packed, had taken to their bunks for some much-needed sleep. Marlin sat beside me as we rushed on, his astronomical preoccupation holding him to a contemplation of the great planet, despite his own weariness. And weary enough he was, and I too, since for almost forty-eight hours we had been flashing through the perils of the asteroidal belt. It was now the beginning of the fifth day since our start from Earth, and already for a hundred hours we had been flashing at tremendous and mounting speed through the airless void. Like Marlin, though, I forgot my weariness in the spectacle of giant Jupiter, to the right and ahead.
For it was a spectacle of magnificence, indeed. Swinging like a giant disk of soft white light in the blackness of space to our right, Jupiter spun amid its four greater moons, the smaller moons being of diameter too small to be seen with unaided eyes even thus close. But of the giant sphere of Jupiter, of that great sphere's surface, nothing was to be seen. For all the mighty planet's surface was covered by the colossal masses of great clouds that enclosed it, floating in its dense atmosphere and encircling it in great belts, the mighty cloud-belts that for long have been to astronomers the most characteristic feature of Jupiter's surface. So that, though Marlin with the aid of the telescope, sought to gain a glance through some opening in the clouds at the great planet's surface, he failed in the attempt.
In a moment, however, he concentrated his attention upon the one visible feature upon the mighty world's surface, the great red spot that we could plainly see now as a pink area beneath the shrouding clouds, in the planet's southern hemisphere. At sight of it, Marlin had prepared and trained his spectroscope upon it, but after observations of a few moments he raised his head, perplexed. He glanced about him for a moment, then seized the bolometer, which by virtue of its new "shielded" principle was able to record accurately the amount of heat radiating from any one point of a planet or star, as well as from the whole planet or star. But upon checking its reading for a moment, after turning it toward the pink area of the great red spot, Marlin straightened from it also, shaking his head.
"It's strange, Hunt," he said, turning toward me. "It's always been believed that the great red spot is a part of Jupiter's surface still molten and flaming, but the spectroscope and bolometer show that it can't be."
"Strange enough," I admitted, gazing myself toward that glowing pink area on the mighty planet. "If we could but stop and explore the planet—but we must keep on toward Neptune."
"We must keep on," Marlin repeated, "but some day it may be, if we can save the solar system from the doom that hangs over it now, we'll come back here to Jupiter, will see for ourselves its surface."
By this time the great planet was almost directly to our right, its giant cloudy white sphere seeming to fill all space, despite the fact that it was more than fifteen million miles from us, and its four big, greater moons revolving about it. Hours before I had shot a force-ray toward the great planet from our flier's side, to counteract its growing pull upon us, but now as we came level with it, were passing it, that pull upon us was so enormous that it was only with a force-ray of immense power that I was managing to keep the space-flier from being drawn inward. Passing thus close, Jupiter's stupendous cloud-belted sphere was an awe-inspiring sight, whirling at immense speed also, since the great planet, more than a thousand times greater than Earth, rotates upon its axis at hardly more than a third of Earth's rotatory period or day, its day being less than ten hours. And passing it thus, too, the great red spot upon its lower half was an even greater enigma, for that gigantic pink oval was, we knew, fully thirty thousand miles in length, greater by far than all our Earth.
It was with awe that Marlin and I, and Whitely and Randall who had awakened now to relieve us, stared toward the gigantic monarch of the sun's planets as it dropped slowly behind on our right. A side-ray of colossal power it had taken, indeed, to hold us out from the great world's pull, and only slowly could we decrease that ray's power as we moved farther out from it. But now at well over four million miles an hour, we were flashing out beyond Jupiter's orbit, and ahead there was gleaming brighter to the left the yellow spot of light that was Saturn, the last planet that we must yet pass before reaching Neptune, since Uranus was in conjunction in regard to Neptune, being far on the other side of the solar system from us. And as Randall now took my place at the controls, I pointed toward the little yellow-glowing, ring-circled disk of Saturn ahead and to the left.
"Keep the flier heading straight toward Neptune, Randall," I told him. "We're going to pass Saturn uncomfortably close as it is, and we don't want to take any chances with it."
Randall nodded, his gaze shifting from the steady green spark of Neptune far ahead to the growing yellow disk of Saturn. "I'll try to keep her straight," he said, grinning, "though I'm beginning to wish that, if there's to be trouble, it had come back on Mars or Jupiter."
I smiled a little as I swung back from the control-panel along the flier's inside wall. I went from handhold to handhold with the pressure of its acceleration still upon me, until I had thrown myself into my metal bunk to fall almost instantly asleep, and to dream nightmare dreams of rushing on through endless space toward a goal that ever receded from us. And in the hours that followed, in the next three days that our space-flier shot on and on with Saturn growing ever greater ahead, the nightmare quality of my experience persisted. It seemed impossible, at times, that we four were in reality doing that which men had never done before; that we were flinging ourselves out into the great void, out through the solar system toward the planet that was its last outpost. We were watching and eating and sleeping, indeed, like men in a dream, so strange and utterly unreal seemed to us this unending rush through unending space.
But though we slept, and ate, and watched at the control-panel like men in a dream, there were times in those hours when realization of our position, of our great mission, came sharply home to us. Those were the times that Marlin trained his instruments upon the sun, which had by then dwindled to a tiny blazing disk behind us. And with those instruments Marlin found that the sun was still spinning ever faster and faster, its rotatory period decreasing still by the same amount each day, its day of division and doom steadily approaching. And with his own recorders Whitely found that the colossal force-ray from Neptune still was stabbing toward the sun, still turning it faster and faster toward its doom and that of its universe. That great force-ray, we found, was stabbing toward the sun on a line between our flier's course and Saturn, but was on a somewhat higher level, so that in reality the great ray did not lie between our flier and Saturn but above both.
The consciousness we had of that great ray's existence and the knowledge we had of the doom it was loosing upon the peoples of our world served to prevent the dream-like lassitude of our conditions from overpowering us, and we were further awakened by the swift expansion of Saturn, ahead, as our flier neared it. For by then the great faceted ball of our flier was hurtling on through the void at five million miles an hour, slowly approaching the limits of its speed as our mighty rear force-ray drove us forward with tremendous power. And at that speed, in the next three days, Saturn loomed larger and larger ahead, until we saw at last that upon the fourth day's beginning we would pass the mighty planet. And at that our interest rose to excitement, because we would pass closer by Saturn than any of the planets in our straight flight out to Neptune, passing it indeed by no more than a million miles. So that as the last hours of those three days passed, we observed the big, yellow-glowing disk of Saturn ahead with intense interest.
And a strange sight indeed was great Saturn as it loomed greater before us and to the left, for strangest of all the sun's planets to the eye is this one. Greatest of all the planets save for mighty Jupiter, its huge sphere seemed even greater than Jupiter by reason of the colossal rings that encircled it, and by its nine greater moons that revolved about it. A solar system in itself seemed Saturn, indeed, its huge rings tilted somewhat, those great rings themselves tens of thousands of miles in width and thousands of miles from the planet they encircled. We could see, as we drew nearer toward the great planet, that those rings were in fact what had long been known by Earth's astronomers—gigantic flat swarms of meteorites and meteoric material revolving about the great planet at immense speed. Of the surface of Saturn, though, no more could be seen than of that of Jupiter, since like Jupiter the great planet was wreathed in colossal cloud-belts.
Marlin shook his head as he gazed toward the great ring-girdled planet, almost filling the heavens beside us. "It is well for us that Saturn is not our goal," he said. "Those titanic meteoric masses that are the rings—to blunder into them would mean instant annihilation."
Whitely nodded. "As it is," he said, "there must be many meteors in this region about Saturn—many that have broken loose from the rings or are flying toward those rings."
"Let's hope that you're wrong on that, at least," I told him. "We'll soon be passing within a million miles of those rings, and I want to meet no meteorites—not after our experience with the asteroids."
By then, indeed, we had drawn almost level with Saturn, its huge sphere and colossal rings almost directly to the left, the edge of those rings, but a half-hundred miles or less in thickness, being a scant million miles or more from our racing space-flier. The great maze of the planet's nine greater moons seemed crowded now upon its other side from us, Titan, largest of those moons shining brilliantly as a small white disk near the huge yellow bulk of Saturn and its colossal rings. Before then indeed, I had been forced to shoot out from the flier's side a force-ray toward Saturn, to counteract the great planet's pull upon us, but though it loomed beside us now almost as immense as great Jupiter itself, its recorded pull upon us was many times less. This was due, I knew, to the comparatively small mass of Saturn, since though of immense size and possessing a vast atmosphere, it is known to be the least dense of all the planets, being of less than 0.7 the density of water.
Even so, however, it was requiring a force-ray of great power to hold our rushing flier out from the huge planet. Though lesser than Jupiter's, its pull upon us was great, nevertheless. And now that we were passing the huge world so closely, it seemed to us with its vast rings and great family of whirling moons to be of universe-size itself, so mighty did it loom beside us. The great rings, of small thickness compared to their huge width and circle, were edge-on to us now, a million miles to the left, and we could see that they were in reality but vast swarms of countless meteors, great and small, whirling at great speed about Saturn and forming by their division three rings, the innermost a darker one. Yet despite their strange appearance and colossal size, it was not the great rings that held our interest so much in that moment as the cloud-hidden surface of Saturn itself. For even as in passing Mars and Jupiter, we were gripped with desire to veer in toward the planet and explore the strange wonders that might exist upon it, or upon its greater moons. But none suggested that thought now. All four of us knew that only the growing green spot of light, that was distant Neptune ahead, must be our goal.
As the flier raced on, almost passing the huge planet now, Randall uttered a swift exclamation, pointing ahead and to the left a little. At the same moment, though, I had seen the thing that had caught his eye—a small dark point growing with lightning swiftness as it rushed toward us; a great dark meteor, perhaps five hundred feet in diameter, rushing toward our flier, whirling far out from Saturn's rings in the same direction as those rings! Instantly, upon seeing it, I had turned more power into the ray that held us out from Saturn, and as we were pushed sidewise in the next moment by that increased power, the big meteor had flashed past us far to the left! And a moment later, I had caught sight of two similar meteors, one smaller than the other, rushing toward us in the same direction from ahead. But these I had seen soon enough to avoid collision.
It was evident that, as Whitely had suggested, we were encountering some of the stray meteors that might be expected to whirl here far out from the meteor-swarms of the great rings. And as we watched tensely now for more meteors, it was with something of awe that we gazed toward the huge rings, that we knew to be rushing swarms of countless similar meteors. It was well, as Marlin had said, that we were not called upon to penetrate through or around those great rings, since in their awful whirling swarms of meteors no craft would be able to live even for a moment. But our space-flier was passing the midmost point of those rings; already huge Saturn was beginning to drop a little behind us; and we breathed more freely. And, ironically enough, it was at that very moment of our relief that catastrophe came upon us. There was a wild shout from Marlin, and simultaneously I saw a huge round dark mass looming dead ahead and whirling toward us. Just as I snapped open the control-levers, that great dark meteor's mass had struck our onrushing flier with a tremendous stunning shock!
For an instant, as the flier reeled and spun there crazily in the gulf of space, it seemed the end to me, but in a moment more I realized that the great faceted walls had not been penetrated, for the air in the flier was unchanged. Had those walls been pierced, the result would have been the instant freezing to death of all of us. But that death had not as yet come upon us, and as I struggled forward in my chair I saw that the space-flier was still whirling crazily around from the shock and that the throbbing of its great generators had ceased. Beside me Marlin and Whitely and Randall were coming back to realization of their surroundings after that colossal shock, Whitely bearing a nasty cut upon his temple. And as Marlin sprang to the flier's side-window, gazed obliquely from it, he uttered an exclamation.
"That meteor just grazed us!" he exclaimed. "If you hadn't jerked the controls over at the last moment, Hunt, it would have hit us head-on! As it is, it smashed through the flier's outer wall, but didn't pierce the inner wall!"
"But the generators!" cried Whitely, who had been fumbling at their switches. "They've stopped! When the meteor crashed through the outer wall it must have broken some of our generator-connections between the two walls!"
"And the flier's falling!" I cried in turn. "It's falling toward Saturn now, with its force-rays dead—we're falling into the great rings!"
For as I glanced outward I had seen that was what was happening. The halting of the generators by the breaking of their connections between the flier's double walls had halted also the force-rays that had been pushing us out toward Neptune and that had been holding us out from Saturn's pull. With the halting of those rays the pull of the mighty planet had at once gripped our space-flier and now we were moving at swiftly-accelerating speed toward that planet's mighty bulk, toward the great rings but a million miles to our left! Were falling helplessly, faster and faster each moment, toward those mighty rings, toward their vast swarms of whirling meteors in which our space-flier and all within it could meet only an annihilating death!
CHAPTER V
At the Solar System's Edge
"Out of the flier!" Marlin cried to us. "Our one chance is to get out and repair those broken connections from the outside."
"But how——" Randall began, when the astronomer broke in on him. "The space-walkers! In them we can get outside, can try to repair those connections before we fall into the great rings!"
A moment we stared toward him in sheer surprise, and then as one we were leaping toward the four big space-walkers, suspended from the flier's wall. For though we had not dreamed, in taking them with us, of any such emergency as now confronted us, we saw that, even as Marlin had said, our one chance to escape the annihilation that soon would be ours otherwise lay in their use. Swiftly, therefore, we unhooked the great cylindrical space-walkers, neither they nor aught else in the flier having any but small weight now, that weight being the result of the pull of great Saturn, toward which we were falling. Quickly swinging open the section near the cylinder's base that was its door, therefore, I pulled myself up into the cylinder, then closed its hermetically-sealing door with the small inside lever provided for the purpose.
I was standing, therefore, in a metal cylinder seven feet in height and three in diameter, its top tapering into a rounded little dome in which were small windows from which I could look outward. My arms I had thrust into the great hollow jointed arms of metal that projected from the cylinder's sides, and had at my fingers' ends inside those arms the controls of the great pincer-hands in which those arms ended outside, and the control also of the small generator inside the cylinder whose little force-ray was shot down from the cylinder's bottom. This could be shot straight down, sending the space-walker upward by pushing against some larger body, or could be shot out obliquely sending the space-walker horizontally in any direction. Once inside the space-walker therefore, with its tiny generator throbbing and the equally small air-renovator and heater functioning, I was ready to venture out into the airless void.
Glancing out through the vision-windows I saw that Marlin and Whitely and Randall had struggled into their space-walkers also, and were signalling their readiness. We grasped therefore the tools and materials we had hastily assembled for our task, these being spare plates to repair the flier's outer wall and a small molecular-diffusion welder, and then with those in the grasp of our great pincer-hands were pulling ourselves toward the flier's screw-door. In a moment we had that open, and were crowding into the little vestibule-chamber which lay between the outer and inner doors. Closing the inner one tightly behind us, we swiftly screwed open the outer door. As it opened there was a rush of air from about us as the air of the little vestibule-chamber rushed out into the great airless void outside, and then Marlin was leading the way out of that door, out into sheer space outside our falling space-flier!
I saw Marlin drawing himself in his space-walker through the door and then floating gently out that door, floating in space a few feet from our flier and falling at the same rate as it toward mighty Saturn! In a moment more I was following him, Whitely and Randall behind me, and as I too propelled myself with a slight push through the door, my cylindrical space-walker floated outward. I found myself, therefore, cased within that space-walker's cylinder, and floating in it in the sheer empty void of interplanetary space! Beside me was the great gleaming faceted ball of our flier, falling at the same rate as ourselves toward the huge rings of mighty Saturn, to the left. Beneath and before and on all other sides of me, though, was only space, the tremendous gulf, gleaming with the great hosts of stars on all sides, with the sun's brilliant little disk shining far behind us. For the moment our position was so strange, so utterly alien and unprecedented, as we four floated there beside the falling space-flier in our four great metal cylinders, that we could only gaze about us in sheer awe and wonder. Then Marlin, with one of the great metal jointed arms of his space-walker, motioned to us and toward the flier, and we realized that we had but little time left in which to accomplish the task now before us.
For with every moment the flier and our four space-walkers were falling at greater speed toward the colossal rings of huge Saturn, to the left, and the whirling titanic meteor-swarms of those rings were growing larger and larger. But a few hours remained before, with the growing acceleration of our free-falling flier, it would be meeting its end in those clashing, crashing meteors of the great swarm, so that if we were to repair the damage to it, and get its generators functioning again before it met its doom, we must work fast. Our four space-walkers were falling toward Saturn at the same rate as the great flier beside us, so that we hung just beside that flier in space without need to use the propelling force-rays of our four cylinders. And now Marlin, grasping with his great metal-pincer hands one of the projecting joints of the flier's great faceted walls, was pulling himself around it even as he fell with it through space, was pulling himself around to its other side, where the meteor that had struck us a glancing blow had done its damage.
In a moment Whitely and Randall and I had followed, moving clumsily in our great cylinders as we fell with the flier on toward Saturn's rings, and as we reached the other side where Marlin was hovering now in his space-walker we saw that the meteor that had grazed us had demolished two of the great facets of the flier's outer wall, and had shattered and crumpled a third. Save for a slight denting, though, the inner wall seemed unharmed, a fact that alone had saved us, but the black cable-connections between the walls were broken in a half-score places, we saw. It was that severing of the connections that had halted our great generators, we knew, so now our first task was to repair those connections, and it was upon that task that we began at once to work. Surely never had men worked under stranger circumstances than those, was my thought as we began the work of re-matching the severed connections. For we four, cased in our four great cylindrical metal space-walkers, were falling through space at a tremendous and ever-increasing rate, even as we worked upon our great flier falling with us, we were falling through the mighty void toward the whirling rings of Saturn, looming immense in space beside us. It meant annihilation for us, if we could not complete our repairs in time to escape them!
And as we toiled there at the connections, it seemed to me that never could we complete them in time to escape the great rings. For not only were there a half-score breaks in the intricate cables, but each cable held within itself a dozen smaller connections or strands that in each break must be exactly rematched. And working as we were with the great pincer-claws of the space-walker our progress was terribly slow. Minutes passed into an hour and another hour, as we labored furiously there outside the flier with those connections, and by then it seemed to us that the colossal rings of Saturn, a huge whirling storm of meteors, were but a few minutes from us, so vastly did they loom before us, and so swiftly were we and our flier falling. With the energy of utter despair we labored on there at the seemingly endless task of rejoining the intricate connections, our tools and materials that we were not using at the moment being simply released by us beside us, since they fell with us and our flier at the same rate toward Saturn and thus were within our grasp, our tools floated there beside us!
Now we were approaching the last of the connections, but now too we saw that it was only a matter of minutes before our space-flier and we would be whirling into the edge of the mighty rings of Saturn, that loomed now gigantic in their spinning meteor-masses before us! Already meteors were driving about us in space more thickly, and only by a miracle had our helplessly-falling flier escaped them so far. It seemed impossible that we could complete our task before the flier and ourselves were shot into the crashing death of those colossal whirling meteor-swarms, but we were working with the mad energy of a forlorn hope, and now too Marlin was leaning toward us with his space-walker to shout something to us. For when one space-walker touched another, their two occupants could hear each other's shouts, the sound-vibrations carried through the touching metal sides. Marlin was crying to us that but minutes were left us, and was ordering Randall to return back inside the flier and stand ready there to shoot it away from the great-looming rings the instant that the connections were repaired!
In a moment Randall had obeyed, pulling himself around the falling flier to its door and inside, while Marlin and Whitely and I worked tensely upon the last of the connections, matching and joining them with the greatest speed of which we were capable. Now it seemed that greater meteors were all about us, and now the huger, denser masses of the mighty rings were towering vastly beside us, as at plummet-like speed our flier and ourselves whirled toward them and toward death! Hanging there in sheer space at the falling flier's side, working madly upon those last connections, with all about us the glittering hosts of the stars and with beside us the titanic bulk of great Saturn and its colossal rings, we seemed caught in some unreal and torturing nightmare. Then as the huge meteor-masses of the mighty rings loomed just beside us, as I reached with the pincer-hands of my space-walker toward the last of the connections, I heard from Marlin in the space-walker touching mine a hoarse cry of despair. But at that last moment my claw-hands were swiftly joining the last connection and in the next instant came the steady throbbing of the great generators inside the flier! In that instant we had grasped our tools with one metal arm and with the other each of us had gripped the edge of the flier's shattered outer wall. And then, just as the flier and ourselves seemed hurtling straight into the mighty wall of whirling meteors that was the great rings beside us, the space-flier, with us three hanging desperately to it, was hurtling away from those rings as its great force-ray shot from inside toward them, was flashing at terrific mounting speed out from them into space!
For an instant, so terrific was the accelerating speed of the flier beneath Randall's control inside, that we three, hanging to the broken outer wall in our space-walkers, seemed on the point of being torn away from our grip on it, of falling back to Saturn once more. But in a moment more, with a great distance already between the flier and the huge rings that had almost been our doom, Randall had halted it, was holding it motionless in space by means of a steady force-ray. Then we were swiftly repairing the break in its outer wall, by means of the plates and tools to which we had clung, setting those great plates in place to replace the three shattered ones, and then welding them swiftly into the flier's outer wall integrally by means of the molecular-diffusion instrument. That done, we pulled ourselves around the flier's faceted surface to its outer door, opening that door and closing it again once inside the vestibule-chamber. Then as Marlin touched a stud the vestibule-chamber was filling with air, and in another moment we were inside the flier once more, were pulling ourselves out of the great space-walkers, with Randall already out of his and at the controls.
"That was almost our trip's end!" cried Marlin as he emerged from his space-walker. "Another few minutes and we'd have been inside the rings—would have been pounded into instant annihilation by the meteors there!"
I passed a hand over my brow. "Never again do I want to find myself in a situation like that," I said. "As it was, it was the space-walkers alone that saved us."
Marlin nodded, gazing out toward great Saturn looming gigantic still to our left. "If ever we come back," he said, "if ever we try to reach Saturn and explore it as we may some day, we'll have our work cut out for us. Those mighty meteor-masses—those rings——"
"Well, at present the farther we get from Saturn the better I'll feel," Whitely told us. "And I'm glad enough that there's no other planet between us and Neptune, at least, for Uranus is far away."
Now, recovering from the first shakiness of the reaction from our awful peril, we turned with Randall to the consideration of our position. Our great ray that had shot back from the flier, and had pushed us by its force out through the solar system, had been snapped out by the halting of the generators, and we had now only the side-ray that was holding us out from Saturn. I suggested, therefore, that for the remainder of our trip out to Neptune we turn the space-flier's rear force-ray upon Saturn instead of Earth, since Earth by now had dwindled to a small bluish-white star far behind. To train our rear force-ray upon Earth and to adjust the mechanism that kept the ray trained automatically afterwards upon the object suggested, would take more time than if we were simply to push the rear force-ray against great Saturn.
Marlin approved the suggestion, so after sending the flier out farther from Saturn and ahead of it by oblique applications of the side-ray, we held it carefully in space until it was headed toward the far green spot of Neptune, and then turned on the rear force-ray with half its full power at the start. At once, with terrific acceleration, we were flashing on toward Neptune, the giant power of the ray pushing against Saturn and driving our flier ever outward. So tremendous was that acceleration, indeed, that despite the shock-absorbing apparatus of our chairs we came near to being overcome by the awful pressure upon us. Yet it was necessary that we use the highest possible speed and acceleration, now, for our former speed and acceleration had been completely lost when the halting of the generators had allowed Saturn to pull us inward. And though we were now flashing out past Saturn's orbit, with only the orbit of Uranus between us and our goal of Neptune, we had still two-thirds of our journey before us! So colossal are the distances between the great outer planets, distances beside which the gaps between Mars and Earth and Venus and Mercury seem tiny.
With the utmost acceleration of speed that we could stand, though, our space-flier was now hurtling outward, its great force-ray pushing against Saturn with more and more power and sending us flashing forward with greater and greater velocity. In the next dozen hours of our flight we had reached again to the speed of five million miles an hour that had been ours before we had met with our misadventure at Saturn. And as we hurtled on Neptune was slowly largening before our eyes, its distant, tiny little spot of calm green light becoming bigger, brighter, though very slowly. But the eyes of Marlin and Whitely and Randall and myself were always upon that green light-spot as we hurtled on, hour following hour and day following day in our eventless onward flight through the solar system's outer immensities of space. And still our speed was steadily growing until at last, by the time we approached Uranus' orbit, we were flying through the great void at the space-flier's utmost velocity, more than eight million miles an hour.
That was a speed colossal, yet so accustomed had we four become to the space-flier's tremendous velocities that it seemed not unusual to us. Flashing through the void as we were, the only objects by which one could measure speed were the planets before and behind us, and these changed in size so slowly as to make our speed seem small. The greatest change to us in the attaining of the space-flier's immense utmost speed was the change of conditions inside the flier itself. Formerly the pressure of our constant acceleration had replaced to some degree the effects of gravitation, that pressure forcing us always towards the flier's rear, as we turned more and more power into our giant pushing ray, as we shot out with greater and greater speed. But now, with our utmost speed attained and that acceleration's pressure missing, we floated inside the flier as though entirely weightless, being attracted only very slightly toward the walls by the slight gravitational attraction of the flier's mass itself. So that now the straps across chairs and bunks and the handholds here and there on the walls that we had provided proved indispensable to us, indeed.
It was upon the fifteenth day after our start from Earth, the first day of July as I noted by Earth-reckoning, that we crossed the orbit of Uranus. As we approached that orbit, only our recording distance-dials, of course, marking the fact that we were nearing the path of Uranus, I stood or rather floated with Marlin and Whitely at the flier's rear windows, gazing backward. Behind us gleamed in the star-swept heavens the planets past which we had come, and those others beyond them. Great Saturn with his vast rings that had almost been our deaths was already dwindling fast, as our flier shot out from it with its force-ray pressing with ceaseless power against it. Already the huge ringed planet was but a tiny yellow disk of light to our eyes, so far out from it we were.
To the left, too, shone the white star of giant Jupiter, small but intensely brilliant still, while farther distant and infinitely fainter was the red spark that was Mars. Our eyes shifted from these to the bluish light-point that was Earth, and then beyond it to the little disk of brilliant fire that was the sun, its light and heat reaching us now in the smallest of quantities as we fled on into the chill immensities of the outer reaches of the solar system. There close beside that fiery little sun-disk we could also make out the silvery little light-point that was Venus, and by making use of a small hand-glass could also discern closer even beside the sun the tiny point of rosy light that we knew to be Mercury, smallest and inmost of all the planets. But as we watched there, as our space-flier hurtled on at unvarying, colossal speed over the orbit of Uranus, it was toward Uranus itself we were gazing. Far back from us on the solar system's other side hung the green spot of light that was Uranus, booming onward in its vast path around the sun, but though we watched steadily through the hand-glass toward it we were unable to make out the four small moons that accompany the great green planet, which shone with a deeper green even than the greenish spot of Neptune, ahead.
"Uranus—Venus—Mercury——," said Marlin, as he gazed musingly backward. "Those three we have not passed, yet they're no greater mysteries to us than those that we have passed. But some day——"
"Some day——," I repeated, staring back, lost in thought myself, not completing, any more than Marlin, the thought that I had started to express.
Nor did I need to complete it, for as Marlin and Whitely and I stared back to where the sun's disk sent its light bravely out across the unthinkable reaches of space that separated us from it, our thoughts were all on those three planets, on Uranus and Venus and Mercury, and on those others, Mars and Jupiter and Saturn, that we had passed. What wonders, unknown to us, might not exist upon any of those worlds? But they were wonders barred to us for the time, since time was the one thing of which we had the least, in our great rush outward to the sun's outermost planet, in our desperate race outward to attempt to save our own Earth from the doom that hovered over it. For still that doom cast its shadowing wing darkly over Earth, still Whitely's instruments informed us that the giant force-ray from Neptune was stabbing back toward the sun, turning the sun ever faster at the same remorseless rate. So that it was toward Neptune, after minutes, that we turned, taking our places in our chairs beside Randall, at the controls, and gazing with him toward the planet far ahead that was our goal.
And now that we had crossed the orbit of Uranus, some two-thirds of our colossal journey's length lay behind us, and Neptune was becoming ever brighter ahead, its pale-green spot of light having become almost as brilliant to our eyes as Saturn, behind us. As we viewed it through our telescope, too, we could make out the tiny light-point of Triton, the single moon of Neptune. Somewhat larger than our own moon was Triton, we knew, and we could see through our glass what had long been known by Earth's astronomers, that this single moon of Neptune's revolved about it in a plane sharply slanted or inclined to the plane of Neptune's equator, to the general plane of the ecliptic or solar system. And close indeed seemed the light-point of this single moon to Neptune, since we knew that it was at almost the same distance from the great planet as our own moon is from Earth.
It was toward Neptune and its little moon that our eyes turned now and in the hours and days that followed, while gradually our excitement became tense as the great planet loomed ahead of us. Soon it had become a perceptible pale-green disk, widening out as we shot on and on toward it. We would reach it, we calculated, upon the twenty-first day of our journey, twenty-one days after starting from Earth. An eternity it seemed, that period of three weeks, such vast realms of space we had come through, such tremendous perils we had dared and passed. But now all those perils and worlds we had passed, Mars and the deadly asteroidal belt, great Jupiter and Saturn and the doom that had almost been ours there, all these things faded from our minds as we found ourselves with our thoughts concentrated wholly upon the far planet that from the first had been our goal, that planet which we must reach if Earth was to be saved. For ever, ever, the great force-ray of Neptune was turning the sun faster, and now less than a hundred days remained before that turning sun would be no longer able to hold together, would be dividing and releasing fiery doom upon Earth and almost all its other planets.
What was awaiting us at Neptune? That was the question that was foremost in all our minds as we shot on in those last tense days. What manner of beings there would they be who, we had assumed, were stabbing this ray of doom toward the sun? What manner of beingscouldthey be who could exist at all, if exist they did, upon such a planet as Neptune, a planet moving about the sun at the unthinkable distance of almost three billion miles? Upon a planet that could receive but a minute fraction only of the sun's light and heat compared to that received on Earth? Upon a planet which astronomers had always believed to be of far lesser density than Earth, of a density little more than that of liquids rather than of solids. Was it possible that upon this farthest of all the sun's circling worlds there could exist life of any kind, not to speak of life intelligent enough to stab across the solar system and spin the sun itself faster to its division and its universe's doom?
Those were the questions that throbbed through our brains now as our hurtling space-flier shot on and on, Neptune growing with each hour before us. By the nineteenth day its disk had expanded to such a degree that we were able to discern upon it the cloud-belts that had already long been seen upon it by Earth's astronomers. By the twentieth those great vapor-belts were plainly perceptible, and also Triton, its moon, had become visible to our unaided eyes, revolving close about the great planet in its sharp-slanted plane, being now behind the planet but so much above it as to be completely visible to us. By the twentieth, too, the sun behind us had become hardly more than a super-brilliant star, its tiny fiery disk bathing us still with a certain amount of light, although long before this we had ceased to rely upon its heat on our flier's sunward side and had had recourse to our own heating-mechanism. By this time too, of all the planets, only Jupiter and Saturn were visible behind us; the rest were invisible to us at the colossal distances which now separated us from then.
It was not behind but ahead, though, that we were gazing, as our space-flier flashed over the last portion of its great trip, as Neptune apparently grew in size before us. Seated in my control-chair, with Whitely and Marlin and Randall in their chairs beside me, I watched the mighty planet fascinated, as we hurtled on toward it in the early hours of the twenty-first day, that day that we had calculated would bring us to our goal. And truly, now, Neptune was looming in something of its true greatness before us. Only a tiny point of light in a telescope on Earth, hardly more than that on the long days of our journey outward, we saw it now in some size and splendor, a huge cloud-belted world as large almost exactly as Uranus, outrivaled in the solar system only by it and by the two giants of Jupiter and Saturn. Over sixty times larger than our own Earth it was, a huge world spinning far out here at the solar system's very edge, the last outpost of that solar system with beyond it only the awful emptiness of interstellar space.
Silently we gazed toward its great, green disk, its small gleaming moon, as our space-flier throbbed on toward it. Whitely, as usual, was checking from time to time the performance of the never-ceasing generators whose great force-ray, pressing against Saturn still, was hurling us forward. Randall was gazing forward with me, helping me now and then to ascertain from our speed and distance dials our distance from the great planet. Marlin had applied himself to the telescope, was gazing ahead through it toward the big world's cloud-wreathed surface, touching a focusing wheel now and then. For minutes we throbbed on thus, the beat of the generators the only sound in the hurtling space-flier's interior, but at last Marlin drew back from the telescope's eye-piece and frowned as he gazed toward the great green planet ahead.
"I can make out nothing through those cloud-belts," he said. "Those belts show, as astronomers have always believed, that Neptune has a great atmosphere. But what lies beneath them we'll not know until we penetrate through them to the planet's surface."
"That won't be long," I told him. "We're already only fifty million miles from Neptune—should reach it in seven or eight hours more."
"You'll be slowing the flier's speed before long then?" asked Whitely, and I nodded.
"We'll wait until we're ten million miles from it and then cut out our rear-ray that's pushing us on, and send out a front force-ray toward Neptune to break our progress."
Those next several hours, however, seemed to us in passing to be drawn out to infinite length, so great had become our suspense. At last, however, as we stared tensely ahead, Randall gave the word beside me that marked our place as within ten million miles of the great planet, which had now grown to a vast pale-green cloudy disk in the heavens before us. And as he gave that word I snapped shut one of the six switches before me, turning off the great rear force-ray of the flier, and at the same moment snapped open another switch that sent a great force-ray stabbing straight out from the ray-opening in the flier's front, stabbing straight out toward the great disk of Neptune ahead!
Almost at once our mad flight toward that huge world began to diminish in speed. Minute by minute the figures on the speed-dial crept backward, so that from eight million miles an hour our speed dropped quickly to six million, and then to four and to three and to two million.
With this swift decreasing of our speed we were experiencing now the reverse of that pressure that had been ours upon our acceleration, since now we were straining upward and forward against the straps of our chairs, the pneumatic shock-absorbing apparatus of those chairs functioning now as it had done then. But though we felt again the dizziness and slight nausea attendant upon these tremendous changes of speed, we forgot that in our intent contemplation of the huge world that loomed but a million miles ahead, its tremendous pale-green sphere, belted with great cloud-masses, seeming to fill the heavens before us. Already Marlin, with his instruments, had found as we neared Neptune that the giant world's rotatory speed was a little more than twenty Earth-hours, solving a problem that long had defied Earth's astronomers by the discovery that the great planet turned on its axis each score of hours.
An involuntary thrill of pride ran through me even as we shot in toward those great cloud-masses that encircled Neptune. Neptune! The sun's farthest world, and we four had reached it, had shot across the awful gulf that none had ever thought to span! Marlin, beside me, was gazing forward into the great cloud-layers now with the astronomical curiosity of all his career gleaming in his gray eyes, as we approached this farthest of our solar system's worlds. Whitely was contemplating it with his usual cool detachment, but thoughtfully. Randall's face was as eager with interest as my own must have been, and when, a little later, there came a low mounting roar of sound around our flashing space-flier, the roar of an atmosphere through which we were rushing, he uttered a low exclamation, swiftly manipulated our outside air-tester, and then turned to us.
"An atmosphere to Neptune, surely enough!" he exclaimed. "About twice the pressure of Earth's, even this far out, and the air-tester shows a large percentage of water-vapor and rather larger amount of oxygen. Otherwise it seems much the same as Earth's."
Marlin nodded. "We should be able to move in that," he said, "but the greater gravitation of Neptune will probably be such as to make it necessary to keep inside the space-walkers."
But now the space-flier was hurtling into the outer vapor-layers, that swirled about us in white mist-masses in the pale light that came to us from the tiny, distant sun. Onward and downward through those vapor-layers, through the cloud-belts about the great planet, our space-flier shot, while we four gazed ahead and downward, now with excitement keyed to an utter tenseness. Then with sudden stunning surprise, for we had thought those cloud-layers of immense thickness, our space-flier shot out and down from them, shot down into clear air, clear atmosphere. And as it did so, from the four of us came simultaneous cries. For there in the pale, dim unEarthly light there stretched far away beneath us the surface of the planet that for so long had been our goal on our great race to save Earth from doom, the surface of great Neptune!
CHAPTER VI
Into Neptune's Mysteries
"Metal, over all Neptune's surface!"
"A metal-covered world!"
Our stunned, astounded exclamation sounded together there as we gazed downward from our flier, whose drop I had instinctively halted. For it was metal indeed that lay beneath us, a gigantic surface of smooth dark metal or metallic substance that glinted dully in the pale light that fell on it, and that stretched away in all directions to the horizons, completely covering the giant planet Neptune as far as we could see! A metal-covered world! In amazement, in awe, we stared down upon it in that moment. For we had expected many things, many aspects which the surface of Neptune might have had, frozen ice-fields or flaming craters or even a liquid world, but never had we expected what we now saw beneath us. Never had we expected to find the huge planet thus sheathed in a dark metal covering that apparently extended over all its gigantic surface! And in all its vast smooth expanse, we saw, there was no higher structure of any sort, nothing but the level plain of smooth dark metal, sweeping far away to the flat horizons.
"Neptune a metal-covered world! And I think I see why, now," said Marlin quickly as we gazed down. "I think that I can understand why the beings of Neptune have covered their world with this shield——"
"But what lies beneath it?" Randall asked. "Do you mean that these beings of Neptune——"
"I mean that beneath this great shield they have built must lie the real world of the beings of Neptune—must lie the source of the giant force-ray that they're stabbing toward the sun!"
"But how to get down inside?" said Whitely. "There seems no opening in this gigantic metal shield——"
"We must go on, then," Marlin told us. "Must go on until we find some way of getting beneath, since beneath that shield there lies our goal!"
A moment we stared toward each other, and then I had snapped open one of the switches before me, turning the ray-direction dial, sending down slantwise toward the metal surface a force-ray, instead of the vertical ray that had upheld our flier. The pressure of this slanting ray at once sent our ball-like space-flier moving forward across Neptune's surface, across the smooth vast dark metal plain whose presence was so astounding to us. I glanced at the outside-temperature dial as we shot forward, saw that the atmosphere through which we moved though dense was cold indeed, hardly above zero in temperature. Then with Marlin and Whitely and Randall I turned my attention to the smooth great metal surface over which we were driving. On and on we shot, though, without finding any slightest change or opening or structure in that unending dark metal surface, that swept away in its vast, bare curve to the horizons, which were very far from us, so great was the radius of curvature of Neptune's mighty sphere. But after tense moments of this fruitless watch from our racing flier, Whitely uttered a low exclamation and pointed ahead, toward a round lighter circle in the dark metal plain far to the left, a circular opening in the giant metal shield!
None other of us spoke as we gazed toward that opening, but at once I had sent the space-flier rushing toward it. As we raced nearer to it we saw that that opening's circle was a full five hundred feet in diameter, and that we could see down through it a great, bright-lit space beneath! Tensely we watched, until in another moment I had sent the space-flier directly above the great opening, so that it hovered motionless above the circular opening's center. And as it hung there we four, forgetful for the moment of all else, were gazing down through the space-flier's window through that opening, down into the great more brightly-lit space that we could see beneath, beneath the huge metal shield that covered all this world!
The first thing that I noted, gazing downward, was that the space beneath the giant metal roof of Neptune was a great one, since it was a full mile from the opening in that roof to the surface of the world far below. Gazing down toward that surface, seeing at last the true surface of Neptune lying in the brighter light that existed in some strange way beneath the gigantic metal roof, we gasped. For upon that surface there loomed countless strange structures such as we had never seen before. Rectangular in shape were those structures, with straight black walls, of great size but seeming rather low in height, and they were without exception roofless! In them we could dimly make out from our great height the gleaming shapes of what seemed huge machines of one sort or another, but could not at that height see whether living beings of any sort moved among the structures. The great circle of the world beneath that we could see, hanging above the opening, was completely covered with these structures, the black walls of one roofless building being surrounded on all sides by the walls of others, there being no streets or open spaces whatever between them! It was as though, indeed, all the surface of the great world beneath had been divided into great compartments by a great checkerboard arrangement of intersecting black walls!
Marlin's eyes were gleaming with excitement as he gazed down. "The city of the creatures of Neptune!" he breathed, as in awe we four stared down. "The city of Neptune that lies beneath the colossal roof, and that must hold somewhere that which we have come to seek!"
"You're going to venture down into this city—down under the great roof?" I asked, and he nodded.
"We must, Hunt, to find the giant force-ray's source. But stand ready to flash the space-flier back upward—for if we're discovered by whatever beings inhabit this strange world, I think we'll get short shrift!"
A moment we paused there, and then as my hands moved upon the switch-controls, decreasing the power of the force-ray that held us upward the space-flier was sinking smoothly and slowly downward, down through the great opening! Tensely and with fascinated interest we gazed about now as we sank into the great space that lay beneath the huge metal roof. That space was brighter-lit than above the roof, we saw, and as we turned a moment to glance upward we saw that looking upwards, the roof was perfectly transparent! Dark, opaque metal when seen from above, it was almost invisible in its transparency when seen from below! And, seeing that, we understood the great roof's purpose. It had been constructed and placed above all Neptune, encircling the great planet and enclosing it, to retain that planet's heat as much as possible. For it was apparent that heat and light radiations or vibrations could not pass up through the metal of the roof from beneath, making it appear black and perfectly opaque from above, but could pass freely down through it from above, making it appear almost perfectly transparent from below!
Even as we grasped the wonder of that, though, we had forgotten it, in the greater wonder of the things that lay now before our eyes. For as we sank down in our space-flier into the great space beneath that roof we could see the surface of great Neptune itself, stretching far away beneath that mighty enclosing shield above it, and covered to the horizons by the strange rectangular and roofless structures such as we had already seen. These were formed, indeed, by smooth black walls of some two hundred feet in height that ran in straight lines in checkerboard arrangement across all the surface of this huge planet, apparently, forming upon all its surface, without streets or parks or openings of any kind, a vast city of rectangular compartments, large and small! A titanic streetless city that covered apparently all the surface of giant Neptune!
But most wonderful of all the things that lay before us in that moment was the fact that nowhere about us could we see any sign of supporting pillars or piers for the giant roof that stretched far above us! For though we could gaze far away to the distant horizons of this great world, we could find no single support for that huge metal roof that apparently covered all the great planet, and whose weight must have been incalculable! And another feature of the giant roof puzzled us. It puzzled us to see the great openings in it like that down which we had come, great circular openings which we could see in it here and there at great distances from each other. Those openings were provided on their under-side with great sliding shutters for closing them tightly, yet all were open! Why should they be open, we silently asked ourselves, if the purpose of the roof was to retain Neptune's heat within that roof? For the existence of those great and unclosed openings in the roof must surely be defeating that purpose, for our outside-temperature dial recorded the same zero temperature as prevailed above the roof!
Yet even these strange things could not wholly draw our interest and attention from the strange compartment-city beneath, as our space-flier sank toward it. We were within a few hundred feet of it, now, and as we dropped nearer, Marlin and Whitely and Randall staring eagerly down beside me, my hands were tense upon the switch-controls, ready to send our flier leaping instantly upward. For if the beings of the city beneath, whatever their nature, caught sight of us, we could expect nothing but instant attack. So that a tenseness held all of us as our great flier's faceted polyhedron dropped on through the pale light beneath the great roof toward the black-walled, checkerboard-like city that stretched across the surface of the great world beneath us. And now, as we sank lower, our eyes were making out ever more clearly the details of that amazing city.
The rectangular black-walled compartments held, as we had half-realized from above, various strange-shaped mechanisms and objects which we could even now only vaguely discern. We could see clearly, though, that here and there across all the vast city's compartmented surface there stood giant metal globes, each a hundred feet in diameter and each occupying a square compartment of its own. There seemed hundreds of these great gleaming globes, scattered here and there in compartments across the city's surface as far as we could see, though their purpose was then quite incomprehensible to us. But as we sank lower still, ever more cautiously, it was not the globes or the compartments' contents that held our attention so much as the astounding, stupefying fact that now was thrust upon us—namely that in all the gigantic compartmented city, in all its strange great black-walled rectangular and roofless enclosures,there moved no living being!