The Sparrow by Mary Doria Russell

amplifiers and frequency converters suspended above the bowl." He pointed things out as they walked along the edge of the dish. "From there, the signals travel down to the building that houses the processing equipment." The wind made it hard to hear, and George had to shout. "The astronomers use what’s essentially a very fancy spectrometer to analyze the polarization, intensity and duration of the radio waves. Jimmy Quinn can explain how all that works, or you can ask me if you like."
    George turned to her before they went inside. "Have you ever done anything like this system before?"
    "No," she admitted, shivering. She should have realized it would be chilly in the highlands. And one had a sense of being overwhelmed at the beginning of a project. She was always starting from scratch and there was always the chance that, this time, she wouldn’t be able to understand, that something would simply be beyond her. Sofia straightened her back. I am Mendes, she thought. Nothing is beyond me. "I’ll manage," she said aloud.
    George looked at her sideways for a moment and then reached past her to open the door to the main building. "I’m sure you will. Listen, if you don’t have any plans next weekend, why not come down to San Juan for dinner …" And they went indoors.

    U PON MEETING M R. Quinn for the first time, Sofia Mendes noted privately that it was evidently her day for being startled by the size of things. She was accustomed to being the smallest adult in nearly any gathering but she had never stood next to anyone as tall as Jimmy Quinn before. She had to reach up to shake his hand and momentarily felt herself to be ten years old, meeting a friend of her father’s.
    She followed him to his work space, Quinn ducking under doorways and pipes as they passed through aisles flanked by cubicles constructed from old-fashioned movable panels. As they walked, he pointed out the locations of the coffee machine and the WC, not seeming to notice that she could not see over the half-walls that rose only chest-high for him. When they arrived at his cubicle, Sofia noticed that he’d removed the middle drawer of his desk, probably to keep his knees from being bruised, she decided.
    For his part, Jimmy was half in love with Sofia Mendes before they sat down. For one thing, she was the most beautiful girl he’d ever seen, in real life. And she’d made the first cut in his mind already by not saying anything about his height. If she managed to go one more minute without asking any stupid basketball questions or the odious "How’s the weather up there?" he swore he’d marry her, but before he could propose, Sofia opened her notebook and asked him for an overview of his job.
    Emilio had warned him that she was not much for small talk, so Jimmy began by walking her through the process of collecting data from a bright region called 12-75. "There’s a stable configuration near the central engine of the system, with two very powerful jets at right angles to it, throwing off material at half the speed of light." He sketched on the screen as he spoke, using an open display so she could take notes while he talked. "Elizabeth Kingery is a light astronomer who thinks she’s got a new way of finding out if there are two galaxies surrounding two black holes locked in orbit around each other, like this, see? And she wants to compare the data to quasars, which people think used to be twinned galaxies like 12-75. Are you following this?"
    Mendes looked up from her notes and impaled him with a stare. Very bright, Emilio had told him. Don’t underestimate her. Jimmy cleared his throat. "So, the idea is to map this region of the sky using both radio and light astronomy in synchronized observations. The astronomer who originates the request gives the observatories at least two or three times when we can do the work. We have to work around the celestial conditions and the weather on Earth."
    "Why not