Nemesis by Isaac Asimov Page A

colonizers would appear. How would Rotor survive then?
    Only if Rotor gained as much time as possible, built up a strong civilization, and expanded reasonably. If they had enough time, they might expand their hold over a group of stars. If not, Nemesis alone would be enough—but it must be made impregnable.
    Pitt did not dream of universal conquest, of conquest of any kind. What he wanted was an island of tranquillity and security against the days when the Galaxy would be aflame and in chaos as a result of conflicting ambitions.
    But he alone could see this. He alone bore the weight of it. He might live another quarter century and might remain in power through all that time, either as actual Commissioner or as an elder statesman whose word would be decisive. Yet, eventually, he would die—and to whom could he then bequeath his far-sightedness?
    Then Pitt felt a twinge of self-pity. He had labored for so many years, would labor for so many more, yet was appreciated—truly appreciated—by none. And it would all come to an end anyway, because the Idea would be drowned in the ocean of mediocrity that constantly lapped at the ankles of those few who could see beyond the years.
    It was fourteen years since the Leaving and when, at any time, had he been able to be quietly confident? He went to sleep each night with the fear that he would be awakened before morning with the news that another Settlement had arrived—that Nemesis had been
found
.
    He passed through every day with some hidden part of him paying no attention to what was immediately on the agenda, but listening—listening for the fatal words.
    Fourteen years and they were still not safe. One additional Settlement had been built—New Rotor. There were people living on it, but it was a new world, of course. It still smelled of paint, as the old saying had it.Three more Settlements were in various stages of construction.
    Soon—within the decade, at any rate—the number of Settlements under construction would increase, and they would be given that oldest of all commands: Be fruitful and multiply!
    With the example of Earth before them, with the knowledge that each Settlement had a narrow and unexpandable capacity, procreation had always been under strict control in space. There the immovable needs of arithmetic met the possibly irresistible force of instinct and immovability won. But as the number of Settlements grew, there would come a time when more people would be needed—many more—and the urge to produce them could be unleashed.
    It would be temporary, of course. No matter how many Settlements there were, they could be filled without effort by any population that could easily double its numbers every thirty-five years, or less. And when the day came when the rate of Settlement formation passed through its inflection point and began to diminish, it might be far harder to stuff the djinn back into its bottle than it had been to release it.
    Who would see this well in advance, and prepare for it once Pitt himself was gone?
    And there was Erythro, the planet that Rotor orbited in such a way that huge Megas and ruddy Nemesis rose and set in an intricate pattern. Erythro! That had been a question from the beginning.
    Pitt remembered well the early days of their entry into the Nemesian System. The limited intricacy of the planetary family of Nemesis had exposed itself little by little, as Rotor raced toward the red dwarf star.
    Megas had been discovered at a distance of four million kilometers from Nemesis, only one fifteenth the distance of Mercury from the Sun of the Solar System. Megas obtained about the same amount of energy as Earth got from its Sun, but with a lesser intensity of visible light and a higher intensity of infrared.
    Megas, however, was clearly not habitable, even at first glance. It was a gas giant, with one side always facing Nemesis. Both its rotation and revolution were twenty days long. The perpetual night on half of Megas cooled itonly