They were now well out toward the edge of the Galaxy, some thirty thousand light years from home. Since they had originally headed out along the narrow diameter of the lens-shaped ma.s.s of stars that forms our Island Universe, they would reach the edge soon.
"We won"t have much chance of finding a G-0 this far out," Arcot pointed out. "We"re about out of stars. We"ve left most of the Galaxy behind us."
"Then let"s go on to another of the galactic nebulae," said Morey, looking out into the almost unbroken night of intergalactic s.p.a.ce. Only here and there could they see a star, separated from its nearest neighbor by thousands of light years of empty s.p.a.ce.
"You know," said Wade slowly, "I"ve been wondering about the progress along scientific lines that a race out here might make. I mean, suppose that one of those lonely stars had planets, and suppose intelligent life evolved on one of those planets. I think their progress would be much slower."
"I see what you mean," Arcot said. "To us, of Earth, the stars are gigantic furnaces a few light years away. They"re t.i.tanic tests tubes of nature, with automatic reading devices attached, hung in the sky for us to watch. We have learned more about s.p.a.ce from the stars than all the experiments of the physicists of Earth ever secured for us. It was in the atoms of the suns that we first counted the rate of revolutions of the electrons about their nuclei."
"Couldn"t they have watched their own sun?" Fuller asked.
"Sure, but what could they compare it with? They couldn"t see a white dwarf from here. They couldn"t measure the parallax to the nearest star, so they would have no idea of stellar distances. They wouldn"t know how bright S Doradus was. Or how dim Van Maanen"s star was."
"Then," Fuller said speculatively, "they"d have to wait until one of their scientists invented the telectroscope."
Arcot shook his head. "Without a knowledge of nuclear physics, the invention of the telectroscope is impossible. The lack of opportunity to watch the stars that might teach them something would delay their knowledge of atomic structure. They might learn a great deal about chemistry and Newtonian physics, and go quite a ways with math, but even there they would be handicapped. Morey, for instance, would never have developed the autointegral calculus, to say nothing of tensor and spinor calculus, which were developed two hundred years ago, without the knowledge of the problems of s.p.a.ce to develop the need. I"m afraid such a race would be quite a bit behind us in science.
"Suppose, on the other hand, we visit a race that"s far ahead of us.
We"d better not stay there long; think what they might do to us. They might decide our ship was too threatening and simply wipe us out. Or they might even be so far advanced that we would mean nothing to them at all--like ants or little squalling babies." Arcot laughed at the thought.
"That isn"t a very complimentary picture," objected Fuller. "With the wonderful advances we"ve made, there just isn"t that much left to be able to say we"re so little."
"Fuller, I"m surprised at you!" Arcot said. "Today, we are only opening our eyes on the world of science. Our race has only a few thousand years behind it and hundreds of millions yet to come. How can any man of today, with his freshly-opened eyes of science, take in the mighty pyramid of knowledge that will be built up in those long, long years of the future? It"s too gigantic to grasp; we can"t imagine the things that the ever-expanding mind of man will discover."
Arcot"s voice slowed, and a far-off look came in his eyes.
"You might say there can be no greater energy than that of matter annihilation. I doubt that. I have seen hints of something new--an energy so vast--so transcendently tremendous--that it frightens me. The energies of all the mighty suns of all the galaxies--of the whole cosmos--in the hand of man! The energy of a billion billion billion suns! And every sun pouring out its energy at the rate of quintillions of horsepower every instant!
"But it"s too great for man to have--I am going to forget it, lest man be destroyed by his own might."
Arcot"s halting speech told of his intense thought--of a dream of such awful energies as man had never before conceived. His eyes looked unseeing at the black velvet of s.p.a.ce with its few, scattered stars.
"But we"re here to decide which way to go," he added with a sudden briskness as he straightened his shoulders. "Every now and then, I get a new idea and I--I sort of dream. That"s when I"m most likely to see the solution. I think I know the solution now, but unless the need arises, I"m never going to use it. It"s too dangerous a toy."
There was silence for a moment, then Morey said, quietly:
"I"ve got a course plotted for us. We"ll leave this Galaxy at a steep angle--about forty-five degrees from the Galactic plane--to give us a good view of our own Galaxy. And we can head for one of the nebulae in that general area. What do you say?"
"I say," remarked Fuller, "that some of the great void without seems to have leaked into my own poor self. It"s been thirty thousand years since I am going to have a meal this morning--whatever it is I mean--and I want another." He looked meaningfully at Wade, the official cook of the expedition.
Arcot suddenly burst out laughing. "So that"s what I"ve been wanting!"
It had been ten chronometer hours since they had eaten, but since they had been outracing light, they were now thirty thousand years in Earth"s past.
The weightlessness of free fall makes it difficult to recognize normally familiar sensations, and the feeling of hunger is one of them. There was little enough work to be done, so there was no great need for nourishment, but the ordinary sensation of hunger is not caused by lack of nourishment, but an empty stomach.
Sleep was another problem. A restless body will not permit a tired brain to sleep, and though they had done a great deal of hard mental work, the lack of physical fatigue made sleep difficult. The usual "day" in s.p.a.ce was forty hours, with thirty-hour waking periods and ten hours of sleep.
"Let"s eat, then," Arcot decided. "Afterwards, we"ll take a few photographs and then throw this ship into high and really make time."
Two hours later, they were again seated at the control board. Arcot reached out and threw the red switch. "I"m going to give her half power for ten seconds." The air about them seemed suddenly snapping with unprecedented power--then it was gone as the coil became fully charged.
"Lucky we shielded those relays," Arcot muttered. The tremendous surge of current set up a magnetic field that turned knives and forks and, as Wade found to his intense disgust, stopped watches that were not magnetically shielded.
s.p.a.ce was utterly black about them now; there wasn"t the slightest hint of light. The ten seconds that Arcot had allowed dragged slowly. Then at last came the heavy crashing of the huge relays; the current flowed back into the storage coils, and s.p.a.ce became normal again. They were alone in the blackness.
Morey dove swiftly for the observatory. Before them, there was little to see; the dim glow of nebulae millions of light years away was scarcely visible to the naked eye, despite the clarity of s.p.a.ce.
Behind them, like a shining horizon, they saw the ma.s.s of the Galaxy for the first time as free observers.
Morey began to make swift calculations of the distance they had come by measuring the apparent change in diameter of the Galaxy.
Arcot floated into the room after him and watched as Morey made his observations and began to work swiftly with pencil and paper. "What do you make?" Arcot asked.
"Mmmmm. Let"s see." Morey worked a moment with his slide rule. "We made good time! Twenty-nine light years in ten seconds! You had it on at half power--the velocity goes up as the cube of the power--doubling the power, then, gives us eight times the velocity--Hmmmmmm." He readjusted the slide rule and slid the hairline over a bit. "We can make ten million light years in a little less than five days at full power.
"But I suggest we make another stop in six hours. That will put us about five radii, or half a million light years from the Galaxy. We"ll need to take some more photographs to help us retrace our steps to Earth."
"All right, Morey," Arcot agreed. "It"s up to you. Get your photos here and we"ll go on. By the way, I think you ought to watch the instruments in the power room; this will be our first test at full power. We figured we"d make twenty light years per second, and it looks as if it"s going to be closer to twenty-four."
A few minutes later, Arcot seated himself at the control board and flipped on the intercom to the power room. "All ready, Morey? I just happened to think--it might be a good idea to pick out our galaxy now and start toward it."
"Let"s wait," cautioned Morey. "We can"t make a very careful choice at this distance, anyway; we"re beyond the enlarging power range of the telectroscope here. In another half million light years, we"ll have a much better view, and that comparatively short distance won"t take us much out of our way."
"Wait a minute," said Fuller. "You say we"re beyond the magnification range of the telectroscope. Then why would half a million light years out of ten million make that much difference?"
"Because of the limit of amplification in the tubes," Arcot replied.
"You can only have so many stages of amplification; after that, you"re amplifying noise. The whole principle of the vacuum tube depends on electronic emission; if you get _too much_ amplification, you can hear every single electron striking the plate of the first tube by the time the thing reaches the last amplifying stage! In other words, if your incoming signal is weaker than the minimum noise level on the first amplifying stage, no amount of amplification will give you anything but more noise.
"The same is true of the telectroscope image. At this distance, the light signal from those galaxies is weaker than the noise level. We"d only get a flickering, blurred image. But if we go on another half million light years, the light signal from the nearer nebulae will be _stronger_ than the base noise level, and full amplification will give us a good image on the screen."
Fuller nodded. "Okay, then let"s go that additional half million light years. I want to take a look at another galaxy."
"Right." Arcot turned to the intercom. "Ready, Morey?"
"Anytime you are."
"Here goes!" said Arcot. He pushed over the little red control.
At full power, the air filled with the strain of flowing energy and actually broke down in spots with the terrific electrical energy of the charge. There were little snapping sparks in the air, which, though harmless electrically, were hot enough to give slight burns, as Wade found to his sorrow.
"Yike! Say, why didn"t you tell us to bring lightning rods?" he asked indignantly as a small spark snapped its way over his hand.
"Sorry," grinned Arcot, "but most people know enough to stay out of the way of those things. Seriously, though, I didn"t think the electrostatic curvature would be so slow to adjust. You see, when we build up our light-rate distortion field, other curvatures are affected. We get some gravity, some magnetic, and some electrostatic field distortion, too.
You can see what happens when they don"t leak their energy back into the coil.
"But we"re busy with the instruments; leave the motorman alone!"