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24 | Kip Thorne on Gravitational Waves, Time Travel, and Interstellar

Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas

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The Origins of LIGO

LIGO is a set of instruments called gravitational wave detectors or gravitational wave interferometers. They are designed to detect these gravitational waves coming from the distant universe and extract the information they carry. So we could use that information to learn about the universe. Each of these instruments is something that measures the stretching and squeezing of space. Monitors, the stretching and squeezed of space, monitors the pattern of stretching squeeze. What we have is we have four mirrors. Each of them weighs about 40 kilograms, 100 pounds. That doesn't sound so bad. I could do this in my backyard. It needs to be near perfect mirrors. And they hang from overhead supports by quartz fibers. Yeah. But

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