Foundation's Edge - Isaac Asimov [138]
"How can you tell?"
"There are substantial quantities of free oxygen in the atmosphere. You can't have that without well-established vegetation."
"What about intelligent life?"
"That depends on the analysis of radio-wave radiation. Of course, there could be intelligent life that has abandoned technology, I suppose, but that seems very unlikely."
"There have been cases of that," said Pelorat.
"I'll take your word for it. That's your department. However, it's not likely that there would be nothing but pastoral survivors on a planet that frightened off the Mule."
Pelorat said, "Does it have a satellite?"
"Yes, it does," said Trevize casually.
"How big?" Pelorat said in a voice that was suddenly choking.
"Can't tell for sure. Perhaps a hundred kilometers across."
"Dear me," said Pelorat wistfully. "I wish I had some worthier set of expletives on instant call, my dear chap, but there was just that one little chance--"
"You mean, if it had a giant satellite, it might be Earth itself?"
"Yes, but it clearly isn't."
"Well, if Compor is right, Earth wouldn't be in this Galactic region, anyway. It would be over Sirius way. --Really, Janov, I'm sorry."
"Oh well."
"Look, we'll wait, and risk one more small Jump. If we find no signs of intelligent life, then it should be safe to land--except that there will then be no reason to land, will there?"
5.
AFTER THE NEXT JUMP, TREVIZE SAID IN AN ASTONISHED voice, "That does it, Janov. It's Gaia, all right. At least, it possesses a technological civilization."
"Can you tell that from the radio waves?"
"Better than that. There's a space station circling the planet. Do you see that?"
There was an object on display on the viewscreen. To Pelorat's unaccustomed eye, it didn't seem very remarkable, but Trevize said, "Artificial, metallic, and a radio-source."
"What do we do now?"
"Nothing, for a while. At this stage of technology, they cannot fail to detect us. If, after a while, they do nothing, I will beam a radio message at them. If they still do nothing, I will approach cautiously."
"What if they do do something?"
"It will depend on the 'something.' If I don't like it, then I'll have to take advantage of the fact that it is very unlikely that they have anything that can match the facility with which this ship can make a Jump."
"You mean we'll leave?"
"Like a hyperspatial missile."
"But we'll leave no wiser than we came."
"Not at all. At the very least we'll know that Gaia exists, that it has a working technology, and that it's done something to scare us."
"But, Golan, let's not be too easily scared."
"Now, Janov, I know that you want nothing more in the Galaxy than to learn about Earth at any cost, but please remember that I don't share your monomania. We are in an unarmed ship and those people down there have been isolated for centuries. Suppose they have never heard of the Foundation and don't know enough to be respectful of it. Or suppose this is the Second Foundation and once we're in their grip--if they're annoyed with us--we may never be the same again. Do you want them to wipe your mind clear and find you are no longer a mythologist and know nothing about any legends whatever?"
Pelorat looked grim. "If you put it that way--But what do we do once we leave?"
"Simple. We get back to Terminus with the news. --Or as near to Terminus as the old woman will allow. Then we might return to Gaia once again--more quickly and without all this inching along--and we return with an armed ship or an armed fleet. Things may well be different then."
6.
THEY WAITED. IT HAD GROWN TO BE A ROUTINE. They had spent far more time waiting in the approaches to Gaia than they had spent in all the flight from Terminus to Sayshell.
Trevize set the computer to automatic alarm and was even nonchalant enough to doze in his padded chair.