This Black Hole - Nasa Universe - Important Discovery
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A black hole is a region of spacetime exhibiting gravitational acceleration so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it. The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole. The boundary of the region from which no escape is possible is called the event horizon. Although the event horizon has an enormous effect on the fate and circumstances of an object crossing it, no locally detectable features appear to be observed. In many ways, a black hole acts like an ideal black body, as it reflects no light. Moreover, quantum field theory in curved spacetime predicts that event horizons emit Hawking radiation, with the same spectrum as a black body of a temperature inversely proportional to its mass. This temperature is on the order of billionths of a kelvin for black holes of stellar mass, making it essentially impossible to observe.
Objects whose gravitational fields are too strong for light to escape were first considered in the 18th century by John Michell and Pierre-Simon Laplace. The first modern solution of general relativity that would characterize a black hole was found by Karl Schwarzschild in 1916, although its interpretation as a region of space from which nothing can escape was first published by David Finkelstein in 1958. Black holes were long considered a mathematical curiosity; it was during the 1960s that theoretical work showed they were a generic prediction of general relativity. The discovery of neutron stars by Jocelyn Bell Burnell in 1967 sparked interest in gravitationally collapsed compact objects as a possible astrophysical reality.
Black holes of stellar mass are expected to form when very massive stars collapse at the end of their life cycle. After a black hole has formed, it can continue to grow by absorbing mass from its surroundings. By absorbing other stars and merging with other black holes, supermassive black holes of millions of solar masses (M☉) may form. There is general consensus that supermassive black holes exist in the centers of most galaxies.
The presence of a black hole can be inferred through its interaction with other matter and with electromagnetic radiation such as visible light. Matter that falls onto a black hole can form an external accretion disk heated by friction, forming some of the brightest objects in the universe. If there are other stars orbiting a black hole, their orbits can be used to determine the black hole's mass and location. Such observations can be used to exclude possible alternatives such as neutron stars. In this way, astronomers have identified numerous stellar black hole candidates in binary systems, and established that the radio source known as Sagittarius A*, at the core of the Milky Way galaxy, contains a supermassive black hole of about 4.3 million solar masses.
On 11 February 2016, the LIGO collaboration announced the first direct detection of gravitational waves, which also represented the first observation of a black hole merger.As of December 2018, eleven gravitational wave events have been observed that originated from ten merging black holes (along with one binary neutron star merger). On 10 April 2019, the first ever direct image of a black hole and its vicinity was published, following observations made by the Event Horizon Telescope in 2017 of the supermassive black hole in Messier 87's galactic centre.
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Is The Black hole The Most Powerful Force In The Universe? - Space Science Documentary
Black holes are some of the strangest and most fascinating objects in outer space. They're extremely dense, with such strong gravitational attraction that even light cannot escape their grasp if it comes near enough.
Albert Einstein first predicted the existence of black holes in 1916, with his general theory of relativity. The term black hole was coined many years later in 1967 by American astronomer John Wheeler. After decades of black holes being known only as theoretical objects, the first physical black hole ever discovered was spotted in 1971.
Then, in 2019 the Event Horizon Telescope (EHT) collaboration released the first image ever recorded of a black hole. The EHT saw the black hole in the center of galaxy M87 while the telescope was examining the event horizon, or the area past which nothing can escape from a black hole. The image maps the sudden loss of photons (particles of light). It also opens up a whole new area of research in black holes, now that astronomers know what a black hole looks like.
So far, astronomers have identified three types of black holes: stellar black holes, supermassive black holes and intermediate black holes.
The Most Extreme Black Holes In The Universe
Black holes are the densest, most powerful objects in the universe. Capable of ripping entire planets and stars to pieces. This animation reveals what the smallest black holes look like compared to the largest.
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The Most Extreme Black Holes In The Universe
The Largest And Most Powerful Black Hole In The Milky Way Galaxy - Space Discovery Documentary
A supermassive black hole (SMBH or sometimes SBH) is the largest type of black hole, containing a mass of the order of hundreds of thousands to billions of times the mass of the Sun (M☉). Black holes are a class of astronomical object that have undergone gravitational collapse, leaving behind spheroidal regions of space from which nothing can escape, not even light. Observational evidence indicates that nearly all large galaxies contain a supermassive black hole, located at the galaxy's center. In the case of the Milky Way, the supermassive black hole corresponds to the location of Sagittarius A* at the Galactic Core. Accretion of interstellar gas onto supermassive black holes is the process responsible for powering quasars and other types of active galactic nuclei.
The Unbelievable Scale of Black Holes Visualized
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Black Holes are weird, and awesome and a lot of other things. Let's go down this rabbit hole...
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What's Inside A Black Hole? | Unveiled
What's Inside A Black Hole?
Black holes are mysterious and bizarre objects in the universe that really have no explanation. In fact, we hardly know anything about what lies inside of a black hole. We know and understand what we see on the outside of a black hole, but we have no way of going inside one to take a look at what is really happening. Even if we sent a probe inside a black hole, it would not survive the journey, and there would be no way that the probe could transmit a signal outside once it had been sucked inside. This is because a black hole is the product of mass being squeezed together so densely, and so tightly, that it creates a gravitational pull that is so strong, that not even light can escape its grasp.
Supermassive black holes with masses millions to billions of times that of the sun are thought to lurk at the hearts of all galaxies in the universe. You may notice that when you see a photo of a spiral galaxy, such as the Milky Way, in the center of the galaxy is a giant mass of light, which many people would think looks like a massive sun.
But this is not light coming from the black hole itself. Remember, that light cannot escape the heavy gravitational pull. Instead, the light we see comes from the magnetic fields near a spinning black hole that propel electrons outward in a jet along the rotation axis. The electrons produce bright radio waves. Quasars are believed to produce their energy from massive black holes in the center of the galaxies in which the quasars are located. Because quasars are so bright, they drown out the light from all the other stars in the same galaxy.
You’re probably asking, ‘well, what’s a quasar?’ A Quasar is the short name for ‘quasi-stellar object’ and is a very highly energetic object surrounding an actively feeding Supermassive Black Hole. In more basic terms, the Supermassive Black Hole in the middle of a galaxy feeds intermittently. As it feeds, gas swirls around it at incredible speeds and forms an insanely bright hot orbiting disk. And if the black hole is swallowing a large amount of material, this feeding is accompanied by gigantic jets of gas. These are called Quasar. They are essentially fueled by the Black Holes they orbit.
The Largest And Most Powerful Black Hole In The Milky Way Galaxy (4K UHD)
The galactic centre of the Milky Way can be found in the constellation of Sagittarius and like many other large galaxies within the universe, it harbours a cosmic terror at its heart, a Super Massive Black Hole!
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The Strongest Magnetic Field in the Universe
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The Mysterious and Powerful Force of Gravity
Experts explain how gravity has the ability to bend light and even time. This is why the immense gravitational pull of a black hole distorts everything around it. |
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Is TON-618 the Largest Black Hole in the Universe? [OOTW]
TON-618 has become a hot topic in the study of black holes in recent years as it sits as the most massive known in the universe. This hyper-luminous quasar shines with the brightness of over 140 trillion of our Sun, and its light and radio emissions have reached us from over 10 billion light years away. Today, we will be taking a look at this beast's profile and analysing the facts, theories and competition, as well as the doubts over the understanding of this abnormal quasar.
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The Brightest and Most Powerful Black Hole in the Universe
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NASA Discovered A Strange Black Hole!
130 million light-years away there is a galaxy called NGC 3147 which is a spiral galaxy. When scientists were studying it they have found a black hole located right at the center of this galaxy.
It is a supermassive black hole 250 million times heavy than our sun. Further research showed that there is a thin disc of material whirling too close to black hole with 10% of the speed of light.
Black Hole coming towards Earth! Watch Here
Black Hole Size Comparison 2017
Stars in our Universe can get unimaginably giant, but one thing that beats them is Black Holes. In this video, we compare these magnificent objects' size with the Earth, Sun, and even the entire Solar System to give a perspective on how truly large Black Holes are.
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What is a Black Hole? - Stephen Hawking's final theory
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The Most MYSTERIOUS Object in the Universe
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Scientists Just Discovered A Hiding Black Hole!
Recently Japanese scientists have discovered a Black Hole inside a galaxy located 25,000 light-years away from Earth. It's about 30,000 times heavy than our sun.
Black Holes have a very strong gravity, it's so strong that even light can't escape. We can't directly see them but we can observe their effects.
NASA just discovered an alien planet. Watch here
BLACK HOLES an essential component of our universe - Space Discovery Documentary
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All objects exert an attractive gravitational force which depends on their mass. Now, imagine an object with a very large mass which is concentrated into such a small volume that the gravitational field generated is powerful enough to prevent anything from escaping its clutches – even light. This bizarre concept intrigues everyone, in particular physicists who theorise about the nature of matter, space and time, and astrophysicists who look for real black holes out in space. Their study brings together the big ideas in fundamental science: Einstein’s theory of gravity – general relativity; the theory of the very small – quantum mechanics; and the origin and evolution of the universe – cosmology. In recent years scientists have sought the answers to questions such as does a black hole have a temperature? What exactly happens when an object falls into a black hole? How many black holes are there in our galaxy? What is the role of black holes in galaxy evolution?
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Black Holes 101 | National Geographic
At the center of our galaxy, a supermassive black hole churns. Learn about the types of black holes, how they form, and how scientists discovered these invisible, yet extraordinary objects in our universe.
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Black Hole Size Comparison 2018
Planets and stars can be really big, but they pale in comparison to some of the largest black holes out there. In this video, we take a look at the full size range of black holes, from collapsed stellar remnants the size of a city to the solar system-sized monsters that dominate galaxies.
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Top 5 biggest black holes ever discovered
The top 5 biggest black holes ever discovered!
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Monster Black Hole - How the Universe Works (S04E03)
How the Universe Works - Monster Black Hole (Season 4/Episode 3).
Black holes are the least understood places in the universe, where the rules of physics collapse. We go inside the super-massive black hole in the center of the Milky Way.
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