Pasadena also reported a new radio contact with Calcutta, and promised to pass the word on to them and to Tokyo. When they closed down the transmitter after midnight, Ken totaled the number of projectors promised with reasonable certainty of having the promises fulfilled. There were eighty. "It may take a year," his father said, "or it may take 10 years, but now we know, without a doubt, that we can someday get our atmosphere back as it was before the comet." Chapter 20. _Reconstruction_ On the twentieth of January the comet reached its closest approach to Earth. It was then less than three million miles away. In the realm of the stars, this was virtually a collision, and if the head of the comet had been composed of anything more than highly rarefied gases it would have caused tremendous upheavals and tidal waves. There were none of these. Only the dust. Ken arose at dawn that day and went into the yard to watch the rising of the golden enemy a little before the sun came over the eastern hills. He doubted whether anyone else was aware it was closer today than it had been before, or ever would be again. He doubted there would be much scientific interest in the event, anywhere in the world. In the observatory, he opened the dome and adjusted the telescope to take a few pictures and spectrograms. He remembered when he had done this, a long time ago, with high excitement and curiosity, and he remembered later times when he had looked up with a bitter hate in his heart for the impersonal object in the sky. Now, he felt nothing. He was aware only of a kind of deadness in his emotions with respect to the comet. There was no excitement he could find in today's event of close approach, which was probably the only one of its kind that would be recorded in the history of mankind. He wondered if he had lost all his scientific spirit that so momentous an occurrence could inspire him so little now. Yet, he no longer hated the comet, either. It was not a thing that could be hated, any more than the wind when it leveled a city, or the waters when they drowned the land and the people on it. These things were beyond hate. You could fight them, but you never had the privilege of hating them. That was reserved only for other human beings. It was because of the great, impersonal nature of their common enemy, he thought, that people had finally turned to fighting each other. It was for this reason that the people of Mayfield had turned their hate upon the scientists. The questions of food and privileges were only superficial excuses. After an hour's work, Ken left the observatory. The gassy tail of the comet was a full halo of lighter yellow hue, as seen directly along its central axis. The darker yellow of the core seemed to Ken like a living heart.