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
I remember vividly hosting a colloquium speaker, about fifteen years ago, who talked about the LIGO gravitational-wave observatory, which had just started taking data. Comparing where they were to where they needed to get to in terms of sensitivity, the mumblings in the audience after the talk were clear: “They’ll never make it.” Of course we now know that they did, and the 2016 announcement of the detection of gravitational waves led to a 2017 Nobel Prize for Rainer Weiss, Kip Thorne, and Barry Barish. So it’s a great pleasure to have Kip Thorne himself as a guest on the podcast. Kip tells us a bit about he LIGO story, and offers some strong opinions about the Nobel Prize. But he’s had a long and colorful career, so we also talk about whether it’s possible to travel backward in time through a wormhole, and what his future movie plans are in the wake of the success of Interstellar. Kip Thorne received his Ph.D. in physics from Princeton University, and is now the Richard Feynman Professor of Theoretical Physics (Emeritus) at Caltech. Recognized as one of the world’s leading researchers in general relativity, he has done important work on gravitational waves, black holes, wormholes, and relativistic stars. His role in helping found and guide the LIGO experiment was recognized with the Nobel Prize in 2017. He is the author or co-author of numerous books, including a famously weighty textbook, Gravitation. He was executive producer of the 2014 film Interstellar, which was based on an initial concept by him and Lynda Obst. He’s been awarded too many prizes to list here, and has also been involved in a number of famous bets. Caltech page Wikipedia page Nobel Prize citation Nobel Lecture Amazon.com author page Internet Movie Database page
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