Star Light

“I’m afraid I was thinking of merely detecting lights,” said Tebbetts. “Pinpointing the sources will be harder, especially from here. I’m pretty sure we can solve your problem, though… that is, if your missing helis are shining their lights. If you think they may have crashed, I shouldn’t think there’d be much chance of light, but I’ll get right to it.”

“How about their power plants?” asked Barle

By the time this question reached the station Tebbets had left according to his promise, but fortunately Benj was able to supply the answer — the information happened to be basic to the Project, which had been carefully explained to him right after his arrival.

“The fusion converters give off neutrinos which we can detect, but we can’t spot their source exactly,” he told the commander. “That’s what the shadow satellites are for. They detect neutrinos, which are practically all coming from the sun. The power plants on Dhrawn and up here don’t count for much against that, even if it isn’t much of a sun. The computers keep track of where the satellites are, and especially wheter the planet is between a given one and the sun, so there’s a measure of the neutrino absorption through different parts of the planet. In a few years we hope to have a statistical X ray of Dhrawn — maybe that isn’t a good analogy for you. I mean a good idea of the density and composition of the planet’s insides. They’re still arguing, you know, wheter Dhrawn should be called a planet or a star, and wheter the extra heat is from hydrogen fusion in the middle or radioactivity near the surface.

“But I’m sure as can be that they couldn’t find your missing fliers from their neutrino emission, even if all their converters are still on.”

Barle

Barle

“That could be bother better and worse,” he remarked to the two scientists. “It’s certainly just as well we didn’t set up that blinker system for night communication; they’d have seen us certainly.”

“Not certainly,” objected Deeslenver. “The human said they could spot such slights, but there was no suggestion that they made a habit of looking for them If it takes instruments, I’d bet the instruments are busy on more important things.”

“So would I, if the stakes weren’t so high,” returned Barle

“But they won’t be looking here. They’ll be searching the neighborhood of the Kwembly, millions of cables from here.”

“Think of yourself back home looking up at Toorey. If you were supposed to examine one part of it closely with a telescope, how much of a slip would it take to make you glance at another?”

Deeslenver conceded the point with a gesture.

“Then we either wait for sunrise, or fly a special if we want to use the Esket as you suggested. I admit I haven’t thought of anything else. I haven’t even thought of what we might do there which would make a good test.”

“It shouldn’t matter too much. The real question would be how soon, and how accurately and completely, the human beings do report whatever we set up for them to see. I’ll think of something in the next couple of hours. Aren’t you researchers setting up for a flight to leave soon, anyway?”

“Not that soon,” said Bendivence. “Also, I don’t agree with you that details don’t matter. You don’t want hem to get the idea that we could possibly have anything to do with that they see happen at the Esket, and they certainly aren’t stupid.”

“Of course. I didn’t mean that they should. It will be something natural, making full allowance for the fact that the human beings know even less than we do about what’s natural on this world. You get back to the labs and tell everyone who has equipment to get onto the Deedee that departure time has been moved ahead. I’ll have a written message for Destigmet in two hours.”

“All right.” The scientists vanished through the door, and Barle

It was still possible that the delay on the Kwembly matter had been a genuine oversight; as the young human had suggested, each person might have thought that someone else had attended to the matter. To Barle

The test certainly had to be made, and the Esket’s transmitters must surely be possible tools for the purpose. As far as Barle

As Barle

With all the pla

The more he thought it over, the better the plan sounded. Barle