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The Spacetime Symphony

Video Quiz

Science is on the verge of observing the ripples in spacetime caused by moving black holes; these gravitational waves will open a new window to the universe of things we can't see with light - things that could unlock some of the deepest mysteries about the universe.
TEDx Talk by Kelly Holley-Bockelmann

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english
spacetime
symphony
3 veces realizada

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Mabel Lus
Mabel Lus
España

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The Spacetime SymphonyVersión en línea

Science is on the verge of observing the ripples in spacetime caused by moving black holes; these gravitational waves will open a new window to the universe of things we can't see with light - things that could unlock some of the deepest mysteries about the universe. TEDx Talk by Kelly Holley-Bockelmann

por Mabel Lus
1

Sometimes I would just lay back and try and feel the earth rotating under me.

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2

Part of me was always a little sad during those times because I really at my core wanted to know about those places and I know I would never be able to reach any of them in my lifetime.

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3

Now I am an astrophysicist and my specialty is ...

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4

This is that kind of paradigm shifting discovery that I want to talk with you about today: ____ first detection of a gravitational wave.

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5

The universe itself is three dimensions of space in one of time, that's space-time, and that actually is the universe and I personally can't see four dimensions very well and so we always make an analogy of a giant fabric and so this fabric is space-time and that is the universe. As you can imagine the universe is being this giant sheet and general relativity says that ____, like the Sun and the Earth, bends space-time.

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6

It just looks like space is bending but remember that's a spacetime tucked together so it's really space and time that is stretching and so what ____ is at its core it's just the response of moving matter to all those dimples in the universe.

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7

Sometimes I just sit with that idea and imagine that in this room right now we are _____ with gravitational waves from every bit of moving matter in the universe, stretching and squeezing us, slowing time down for us and speeding it up.

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8

The best analogy I've heard is that if we look at the nearest star Proxima Centauri which is trillions of miles away when a gravitational wave passes by it'll move by a hair's breadth.

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9

What an interferometer is is essentially like a light race, a race of light you send. A beam of light in one direction and then in another direction at the same time and, if both of those packets of light have traveled the same distance, they'll come back at a detector _____

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10

If either one of the arms change then you get a _____ on the detector.

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11

After 40 years the sensitivity was finally good enough for us to be able to detect that fraction of a change in the proton lengths over ____ kilometers and on September 14 2015 there was a little wiggle in the Hanford interferometer and a little wiggle in the one in Louisiana.

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12

But for me the even better part is what made this 1 billion years ago. There was a 30 solar mass black hole and a 40 solar mass black hole separated by the distance between let's say Nashville in Atlanta orbiting around one another at basically the speed of light getting closer and closer and closer and crashing into one another. That intense motion really shook the fabric of space-time. It's like I'm shaking my bed right now that the sheet on my bed is rippling that gravitational wave out throughout the universe getting weaker and weaker until ______ years later it wiggles a detector one ten-thousandth of a proton length and another one again about that much.

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13

There is something about our universe that we don't know now and now the universe ____ tell us. We have a way to detect that.

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14

This very time human beings look at the universe in a different way _____ if we look in a different wavelength of ____.

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15

I'm super ____ about that kind of thing.

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16

Remember you ____, you move all throughout your life, you make a gravitational wave. Every move, every choice you make all throughout your life is making a gravitational wave propagating away from you at the speed of light. And long after you're gone that imprint that you have made in the universe will exist.

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17

I just want to end with the idea that your choices matter, they're going to be part of the universe. And the things that we do now are going to be traveling away from us as a wave in the cosmos at the speed of light eventually reaching those very stars that I was looking at when I was a little girl. So remember your ____ matter and they're written in the universe.

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