The Sparrow

nothing special, DNA is a pretty easy molecule to make and life is fairly abundant in the universe.'

'My goodness,' Anne sighed, 'what a fall. We thought we were the center of the universe and now look! Just another bunch of sentients. Ho-hum.' Her face changed and she leaned over to hug Emilio with wicked glee. 'Whom do you suppose God loves best, Father? Ooh, there's a nasty little idea. Sentient rivalries! Think of the theology, Emilio!'

Emilio, who had played the music again and again, catching more of it each time, finding a pattern or two, suddenly sat very still. But before he could say anything, Anne spoke up again. 'Jim, you said this was Alpha Centauri. What's the system like?'

'Pretty complicated. Three suns. A yellow one that's a lot like Sol and two others, red and orange. People have thought for years that the system was a good candidate for having planets. But it isn't easy to sort things out when you've got three stars to contend with, so I guess it never seemed worth the effort. Jeez, it's going to be a hot prospect now.'

The discussion went on for some time, with George, Anne and Jimmy extrapolating, deducing and arguing. Emilio, thoughtful, went back to the music again, playing it through softly once more, but then he turned the playback off.

Sofia alone had neither comment on the music itself nor any speculation about the singers, but when the talk finally slowed to a halt, she asked, 'Mr. Quinn, how did you decide to run the signal through an audio output?'

In the excitement, Jimmy had forgotten the embarrassment of the previous evening, and now he was feeling too good to care. 'Well, there was all the music last night,' he said evenly. 'And when I was in school, I had a part-time job cleaning up old recordings from a Soviet archive for digitizing. The signal just looked like music to me. So I decided to give it a try.'

'It would be fair to say that you used your intuition.'

'I guess so. It was a hunch.'

'Would another astronomer have known what a musical signal looks like and come to the same conclusion?'

'Hard to say. Probably. Sure—somebody would have thought of it eventually.'

'Would it ever have occurred to you, do you think, to suggest to me that the AI system wash all signals through an audio output to screen for transmissions such as this?'

'Only to eliminate them as ETs,' Jimmy admitted. 'See, we always expected a string of primes, some kind of mathematical sequence. I think I'd have suggested that anything that looked like music was definitely not ET. Remember? Yesterday?' He yawned enormously and stood to stretch, which required Anne to duck out of his way and George to move into a corner. 'Day before yesterday, now. I sort of recognized that the signal was music then, so I assumed it was local. If I'd been sure it was ET, I might never have considered music. I don't know why but I always thought it was either music or ET, but not both.'

'Yes. Odd, isn't it. That would have been my assumption as well,' she said without emotion, but she was twisting the metal bracelet around and around. Triple time. She'd be perhaps thirty-seven or thirty-eight. Not forever. Hubris, to have made the wager. 'Mr. Quinn, your job is secure. My system would not have picked this up. I will recommend that the project be scaled back. I can automate the request-and-return segments of the work. And coordination of scheduling. That could be finished in one or two months.'

'We could go, couldn't we…if we wanted to?' Emilio said in the silence that followed her remarks. 'I mean, there'd be a way to get there, if we decided to try.'

The others looked at him blankly, still thinking about Sofia's unenviable position.

'We could use a meteor—no, an asteroid, yes?' he corrected himself, looking directly at Sofia. 'It wouldn't be any worse than the little wooden ships people used to cross the Atlantic in the 1500s.'

At first, only Sofia saw what he was driving at. 'Yes,' she said, glad to be distracted by him for once. 'The asteroids aren't bad, really. The miners' quarters can be rather comfortable—'

'Yeah, sure,' George said. 'You've already got the mass-drivers grafted on and the lifepod in place. Get a big enough asteroid and you could just keep feeding slag into the engines. We do it now on a small scale to bring the rocks into Earth orbit from the asteroid belt. I thought years ago that you could go as far as you wanted, if you got a big enough rock. There just wasn't any reason to leave the solar system.'

'Until now,' Emilio said.

'Until now,' George agreed.

'Did I miss something?' Anne said. 'Asteroids?'

But George was starting to laugh and Emilio looked positively beatific. 'Sofia,' George said, 'tell Anne about that contract you had—'

'— with Ohbayashi,' Sofia finished for him. She looked at Anne and then the others, and gave a small astonished laugh before saying, 'It was just before working with Dr. Sandoz in Cleveland. I did an expert system for Ohbayashi's asteroid mining division. They specified an AI program that could take into account the cost of remote assaying and the costs of capturing an asteroid, mining and refining the minerals in space, versus the projected market values of the product at delivery, Earthside. Very little intuition involved, except projecting future metals prices,' she said wryly. 'You're right, Dr. Sandoz. A partially mined asteroid could be used as a vehicle.'

Emilio, who had been leaning forward and watching her carefully as she spoke, clapped once and sat back in his chair, smiling broadly.

'But it would take four years, wouldn't it?' Anne objected.

'Four years isn't so bad,' Emilio said.

'Whoa,' Jimmy said, looking at Sofia and Sandoz. 'Okay, first off, it's four point three and it's light years, not plain solar years. Even a third of a light year is a nontrivial distance. And anyway, that's the time it takes for light and radio waves to travel the distance, not a ship. It would take a ship a lot longer…but even so…' he said, starting to think about it now.

George gestured for Sofia's notebook and stylus. Emilio saved his file and handed it over. 'Okay, so do the problem,' George said, blanking the screen so he could sketch the idea out on the tablet. 'At thirty-two feet per second per second, you'd have one G of gravity. Say you accelerate for half the trip and then rotate the rock a hundred and eighty degrees and decelerate for the second half…'

For a while there was no sound except the muttering of numbers and the tapping of a keyboard, Jimmy beginning the calculations on-line as George continued them by hand. George finished his estimate first, to Jimmy's irritation. 'You'd need about seventeen years to get there, not four.' Emilio looked both crestfallen and startled by the difference. 'Hell,' George told him, 'Anne was in graduate school longer than that!' Anne snorted but George went on, 'What if you kept a normal sleeping and waking schedule and bumped the engines up for two Gs while the crew's flat in bed? That would cut the time down and get you closer to light speed, so you'd get some help from relativity. Make the trip seem faster to the people onboard.'

Jimmy continued to work on his own line of calculation. 'No, wait. It might seem to the crew more like six or seven months.'

'Six or seven months!' Emilio exclaimed.

'Jeez,' Jimmy said, staring at the numbers. 'You could get real close to light speed in less than a year or so, even at one G, constant acceleration. Like maybe ninety-three percent. Anybody want to take on Einstein? I wonder if you'd run out of rock…How big would the asteroid have to be?' he asked himself and went back to the calculations.

'Wait a minute. I don't understand about people sleeping,' Anne said. 'Wouldn't you have to have somebody awake all the time to steer?'

'Nah—navigation would be mostly automated, at least until you got near the system,' George told her. 'You'd just launch yourself in the right direction—'

'And pray,' said Emilio, laughing a little crazily.

They fell quiet, talked out for the moment. 'What do we do now?' Jimmy asked. It was almost eight o'clock, and he was beginning to think about what kind of trouble he could be in for not calling Masao Yanoguchi first.

It was Emilio Sandoz, face solemn and eyes alight, who answered him. 'Start planning the mission,' he said.

There was silence and then Anne laughed uncertainly. 'Emilio, sometimes I can't tell when you're joking. Do you mean a mission or do you mean a mission? Are we talking science or religion?'

'Yes,' he said simply, with a kind of hilarious gravity that kept the rest of them off balance. 'Sofia, George,