Foundation and Earth

"Then this must be the planetary system containing Earth. Surely, no one could invent such a planet. It would have had to have been seen to be described."

Trevize said, "I'm prepared to believe just about anything your legends say now. This is the sixth planet and Earth would be the third?"

"Right, Golan."

"Then I would say we were less than 1.5 billion kilometers from Earth, and we haven't been stopped. Gaia stopped us when we approached."

Bliss said, "You were closer to Gaia when you were stopped."

"Ah," said Trevize, "but it's my opinion Earth is more powerful than Gaia, and I take this to be a good sign. If we are not stopped, it may be that Earth does not object to our approach."

"Or that there is no Earth," said Bliss.

"Do you care to bet this time?" asked Trevize grimly.

"What I think Bliss means," put in Pelorat, "is that Earth may be radioactive as everyone seems to think, and that no one stops us because there is no life on the Earth."

"No," said Trevize violently. "I'll believe everything that's said about Earth, but that. We'll just close in on Earth and see for ourselves. And I have the feeling we won't be stopped."

89.

THE GAS giants were well behind. An asteroid belt lay just inside the gas giant nearest the sun. (That gas giant was the largest and most massive, just as the legends said.)

Inside the asteroid belt were four planets.

Trevize studied them carefully. "The third is the largest. The size is appropriate and the distance from the sun is appropriate. It could be habitable."

Pelorat caught what seemed to be a note of uncertainty in Trevize's words.

He said, "Does it have an atmosphere?"

"Oh yes," said Trevize. "The second, third, and fourth planets all have atmospheres. And, as in the old children's tale, the second's is too dense, the fourth's is not dense enough, but the third's is just right."

"Do you think it might be Earth, then?"

"Think?" said Trevize almost explosively. "I don't have to think. It is Earth. It has the giant satellite you told me of."

"It has?" And Pelorat's face broke into a wider smile than any that Trevize had ever seen upon it.

"Absolutely! Here, look at it under maximum magnification."

Pelorat saw two crescents, one distinctly larger and brighter than the other.

"Is that smaller one the satellite?" he asked.

"Yes. It's rather farther from the planet than one might expect but it's definitely revolving about it. It's only the size of a small planet; in fact, it's smaller than any of the four inner planets circling the sun. Still, it's large for a satellite. It's at least two thousand kilometers in diameter, which makes it in the size range of the large satellites that revolve about gas giants."

"No larger?" Pelorat seemed disappointed. "Then it's not a giant satellite?"

"Yes, it is. A satellite with a diameter of two to three thousand kilometers that is circling an enormous gas giant is one thing. That same satellite circling a small, rocky habitable planet is quite another. That satellite has a diameter over a quarter that of Earth. Where have you heard of such near-parity involving a habitable planet?"

Pelorat said timidly, "I know very little of such things."

Trevize said, "Then take my word for it, Janov. It's unique. We're looking at something that is practically a double planet, and there are few habitable planets that have anything more than pebbles orbiting them. Janov, if you consider that gas giant with its enormous ring system in sixth place, and this planet with its enormous satellite in third-both of which your legends told you about, against all credibility, before you ever saw them-then that world you're looking at must be Earth. It cannot conceivably be anything else. We've found it, Janov; we've found it."

90.

THEY WERE on the second day of their coasting progress toward Earth, and Bliss yawned over the dinner meal. She said, "It seems to me we've spent more time coasting toward and away from planets than anything else. We've spent weeks at it, literally."

"Partly," said Trevize, "that's because Jumps are dangerous too close to a star. And in this case, we're moving very slowly because I do not wish to advance into possible danger too quickly."

"I thought you said you had the feeling we would not be stopped."

"So I do, but I don't want to stake everything on a feeling." Trevize looked at the contents of the spoon before putting it into his mouth and said, "You know, I miss the fish we had on Alpha. We only had three meals there."

"A pity," agreed Pelorat.

"Well," said Bliss, "we visited five worlds and had to leave each one of them so hurriedly that we never had time to add to our food supplies and introduce variety. Even when the world had food to offer, as did Comporellon and Alpha, and, presumably-"

She did not complete the sentence, for Fallom, looking up quickly, finished it for her. "Solaria? Could you get no food there? There is plenty of food there. As much as on Alpha. And better, too."

"I know that, Fallom," said Bliss. "There was just no time."