That black holes became this thing which almost had to be there. And eventually boom, they merge together. Perhaps a better analog is a seismometer. And what happened on the morning of August 17th when we, uh, when we detected the binary neutron star is the LIGO Hanford detector, one of the detectors as computer software that scans continuously for these patterns, these chirp patterns of gravitational waves looking for these signals in the detector data and the software that was looking at the Hanford data in Washington state said, I think I’ve seen something really interesting. It pulls the star out of equilibrium and that, that takes energy to do.

More recently, scientists have achieved the first detection of colliding neutron stars, rocking the scientific world again and inaugurating the era of multi-messenger gravitational wave astronomy. The core of the star is more than the mass of the sun, about one and a half times the mass of our sun, but compacts down into a region about the size of Manhattan. They had many, many partners along the time, the time of their lifetime. All Rights Reserved.What does it mean to be human? What’s going on? And the reason that this would summarize in an extraordinarily good way our achievement is that number one, on the theoretical side, it would tell these people that we have reached a situation where we understand already that space time is not just the backdrop of cosmic events, as was once thought, but is actually an active participant. Explore our wide range of fascinating science videos on physics, biology, robotics, the brain, the earth, space, engineering, and more.
And fortunately we managed to do that quickly enough that we didn’t really lose that much. So the matter in neutron stars is denser than, than any physical matter you might be familiar with. Eventually their cores are going to collapse and depending on their mass, they’re extremely massive, um 20, 30, 50 times the mass of the sun. The full Cool Jobs program from that year can be viewed online. They propagate out at the speed of light and as Duncan has mentioned, the exact details of how, of the shapes of these ripples encodes, what produced them, so you can imagine there’s just some two things going around like that. Much as matter, however complicated, can be decomposed into combinations of atoms, mathematical functions, however complicated, can be decomposed into combinations of simpler functions--sines and cosines. Neutron stars or black holes.

New video So we were still delayed by a little bit, but we didn’t miss the whole day. And as uh, imagine, um, I guess in a glass of, I don’t know, I’m thinking a glass of milk with heavy, I don’t know.KALOGERA: I’m thinking of coffee, coffee beans covered with chocolate.

What does that mean? So you have pairs that were born as stars together and they stayed together all their lives and others that went through the dance floor.

So if in LIGO we think classically we think of light as a wave and you set this up so the the peaks and troughs of the waves line up and so you get what we call constructive interference coming back towards the laser and destructive interference going towards the photo detector.LIVIO: Constructive interference is when the light from the two things amplifies each other and destructive is when it kills each other.BROWN: Right, and so all the light comes back towards the laser when the thing is perfectly balanced, as the gravitational wave passes through, it stretches one arm and squeezes the other arm, and so it upsets that perfect length balance between these two arms. Meet the scientists who are transforming the fields of physics, neuroscience, biology, robotics, and more. But we don’t have the perfect answer to your question. To me, that was the most astonishing thing about seeing their data for the first time, is that it was the first direct evidence for black holes as described by the theory of relativity.LIVIO: Right?

Um, and then of course, you know, there, there’s also a factor that depending on the size of the star, they eventually crash into each other. In 1927, Werner Heisenberg derived his Uncertainty Principle, establishing that there are qualities of the world, such as the position and the speed of a particle, that can not be known simultaneously. These ripples propagate and LIGO measures these little fluctuations, so now say, okay, we’ve seen some ripple. So your typical, like the power in your cell phone these days, cellphones are.PRETORIUS: So if you have like a million cell phones all working together for an hour. All Rights Reserved. And then there’s a French Italian detector just outside Pisa in Italy. What does it represent? And the real world is a noisy, messy, dirty place. Nothing to see here. It’s a theory about space and time and it says that space, space and time or space time can be described by a geometric structure, distances by things separated by a certain amount of space or distances in time. So, so we’re, we’re trying to find out what are the properties of the mysterious matter in the core of the stars. Right. Required fields are marked * Comment. Please go on.PRETORIUS: We so so that that perhaps brings to one problem with something like LIGO in the sense that as with Duncan described, it’s not a telescope, it’s not focusing gravitational waves onto an image, so we can sort of see what things look like in gravitational waves.
Sign in to YouTube. In other words, these manifestations of space and time were space and time that were so warped that event horizons formed.PRETORIUS: But then with LIGO’s discovery, we saw the gravitational waves coming from this warping of space time around two merging black holes. Now bells are very efficient at ringing.

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