The Stars Like Dust - By Isaac Asimov Page 0,54

the solution obvious? Doesn't it seem inevitable that the world could exist only within the Nebula itself?"

"Inside the Nebula!"

Gillbret said, "Great Galaxy, of course."

And, at the moment, the solution did indeed seem obvious and inescapable.

Artemisia said timidly, "Can people live on worlds inside the Nebula?"

"Why not?" said the Autarch. "Don't mistake the Nebula. It is a dark mist in space, but it is not a poison gas. It is an incredibly attenuated mass of sodium, potassium, and calcium atoms that absorb and obscure the light of the stars within it, and, of course, those on the side directly opposite the observer. Otherwise, it is harmless, and, in the direct neighborhood of a star, virtually undetectable.

"I apologize if I seem pedantic, but I have spent the last several months at the University of Earth collecting astronomical data on the Nebula."

"Why there?" said Biron. "It is a matter of little importance, but I met you there and I am curious."

"There's no mystery to it. I left Lingane originally on my own business. The exact nature is of no importance. About six months ago I visited Rhodia. My agent, Widemos-your father, Biron-had been unsuccessful in his negotiations with the Director, whom we had hoped to swing to our side. I tried to improve matters and failed, since Hinrik, with apologies to the lady, is not the type of material for our sort of work."

"Hear, hear," muttered Biron.

The Autarch continued. "But I did meet Gillbret, as he may have told you. So I went to Earth, because Earth is the original home of humanity. It was from Earth that most of the original explorations of the Galaxy set out. It is upon Earth that most of the records exist. The Horsehead Nebula was explored quite thoroughly; at least, it was passed through a number of times. It was never settled, since the difficulties of traveling through a volume of space where stellar observations could not be made were too great. The explorations themselves, however, were all I needed.

"Now listen carefully. The Tyrannian ship upon which my Lord Gillbret was marooned was struck by a meteor after its first Jump. Assuming that the trip from Tyrann to Rhodia was along the usual trade route-and there is no reason to suppose anything else-the point in space at which the ship left its route is established. It would scarcely have traveled more than half a million miles in ordinary space between the first two Jumps. We can consider such a length as a point in space.

"It is possible to make another assumption. In damaging the control panels, it was quite possible that the meteor might have altered the direction of the Jumps, since that would require only an interference with the motion of the ship's gyroscope. This would be difficult but not impossible. To change the power of the hyperatomic thrusts, however, would require complete smashing of the engines, which, of course, were not touched by the meteor.

"With unchanged power of thrust, the length of the four remaining Jumps would not be changed, nor, for that matter, would their relative directions. It would be analogous to having a long, crooked wire bent at a single point in an unknown direction through an unknown angle. The final position of the ship would lie somewhere on the surface of an imaginary sphere, the center of which would be that point in space where the meteor struck, and the radius of which would be the vector sum of the remaining Jumps.

"I plotted such a sphere, and that surface intersects a thick extension of the Horsehead Nebula. Some six thousand square degrees of the sphere's surface, one fourth of the total surface, lies in the Nebula. It remains, therefore, only to find a star lying within the Nebula and within one million miles or so of the imaginary surface we are discussing. You will remember that when Gillbret's ship came to rest, it was within reach of a star.

"Now how many stars within the Nebula do you suppose we can find that close to the sphere's surface? Remember there are one hundred billion radiating stars in the Galaxy."

Biron found himself absorbed in the matter almost against his will. "Hundreds, I suppose."

"Five!" replied the Autarch. "Just five. Don't be fooled by the one hundred billion figure. The Galaxy is about seven trillion cubic light-years in volume, so that there are seventy cubic light-years per star on the average. It is a pity that I do not know which of those five have