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Monster Black Holes - National Geographic

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Black Holes National Geographic Documentary HD

Black Holes National Geographic Documentary HD
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Black Hole Dive into the Power Centers of the Universe - Supermassive Black Hole Documentary

There's a supermassive black hole at the center of our galaxy. It can't be seen directly through telescopes or with our eyes, but astronomers know it's there. In fact, there are supermassive black holes at the hearts of many galaxies. How do astronomers know these monsters lurk in the galactic cores? They use a variety of methods to study light as it passes by a black hole and they also study the region around a black hole to understand how it affects nearby clouds of gas, dust, and even stars. Currently, the supermassive black hole in the Milky Way, called Sagittarius A*, is a fairly quiet one, and astronomers monitor it in many wavelengths of light to understand its actions.
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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 Holes 101 | National Geographic


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The Most Dangerous Supermassive Giant Black Hole in the Universe Documentary HD 1080p

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On our channel a lot of interesting documentaries on such themes: to destroy the Land, kill the Earth, end of Earth, the death Land, death Land, doomsday, Armageddon, Apocalypse, space, about space, star, stars, universe, galaxy, big Bang the big Bang theory, constellation, planet, solar system, satellite, UFO, aliens, Earth, planet Earth, Moon, Mars, Jupiter, Venus, Saturn, Uranus, Neptune, Pluto, mercury, astronaut, rocket, meteor, comet, astronomy, matter, quasar, telescope, meteor, Infinity, planets, Sun, Hubble, asteroid, documentary, black hole, quasar, national geographic documentary, full documentary, discovery documentary, history documentary, bbc documentary, national geographic, the universe, discovery channel, stephen hawking, brian greene, Neil deGrasse Tyson,
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BLACK HOLES - Full Documentary - Penetrating the Mystery of Singularities

A black hole is a place in space where gravity pulls so much that even light can not get out. The gravity is so strong because matter has been squeezed into a tiny space. This can happen when a star is dying. Because no light can get out, people can't see black holes. They are invisible. Space telescopes with special tools can help find black holes. The special tools can see how stars that are very close to black holes act differently than other stars.

How Big Are Black Holes?

Black holes can be big or small. Scientists think the smallest black holes are as small as just one atom. These black holes are very tiny but have the mass of a large mountain. Mass is the amount of matter, or stuff, in an object.

Another kind of black hole is called stellar. Its mass can be up to 20 times more than the mass of the sun. There may be many, many stellar mass black holes in Earth's galaxy. Earth's galaxy is called the Milky Way.

The largest black holes are called supermassive. These black holes have masses that are more than 1 million suns together. Scientists have found proof that every large galaxy contains a supermassive black hole at its center. The supermassive black hole at the center of the Milky Way galaxy is called Sagittarius A. It has a mass equal to about 4 million suns and would fit inside a very large ball that could hold a few million Earths.


How Do Black Holes Form?
Scientists think the smallest black holes formed when the universe began.

Stellar black holes are made when the center of a very big star falls in upon itself, or collapses. When this happens, it causes a supernova. A supernova is an exploding star that blasts part of the star into space.

Scientists think supermassive black holes were made at the same time as the galaxy they are in.


If Black Holes Are Black, How Do Scientists Know They Are There?
A black hole can not be seen because strong gravity pulls all of the light into the middle of the black hole. But scientists can see how the strong gravity affects the stars and gas around the black hole. Scientists can study stars to find out if they are flying around, or orbiting, a black hole.

When a black hole and a star are close together, high-energy light is made. This kind of light can not be seen with human eyes. Scientists use satellites and telescopes in space to see the high-energy light.


Could a Black Hole Destroy Earth?
Black holes do not go around in space eating stars, moons and planets. Earth will not fall into a black hole because no black hole is close enough to the solar system for Earth to do that.

Even if a black hole the same mass as the sun were to take the place of the sun, Earth still would not fall in. The black hole would have the same gravity as the sun. Earth and the other planets would orbit the black hole as they orbit the sun now.

The sun will never turn into a black hole. The sun is not a big enough star to make a black hole.


How Is NASA Studying Black Holes?
NASA is using satellites and telescopes that are traveling in space to learn more about black holes. These spacecraft help scientists answer questions about the universe.

Space Documentary - Biggest Black Holes - Universe Documentary National Geographic

Space Documentary - Biggest Black Holes - Universe Documentary National Geographic

Space (Hyperspace in the United States) is a 2001 BBC documentary which ran for six episodes covering a number of topics in relation to outer space. The series is hosted and narrated by actor Sam Neill. Star Stuff:The first episode covers the origins of life and how everything is produced by the process in which stars burn their fuel. Staying Alive: This episode analyses the chances of Earth being destroyed by a black hole or asteroid. Black Holes: Episode three looks at how black holes are formed and how they behave, with potential to destroy the solar system. Are We Alone?: Number four looks for potential homes of extraterrestrial life and the chances that humans could make contact New Worlds: The fifth episode covers the possibility of colonising and terraforming planets both in our solar system and beyond into deep space. Boldly Go: The final episode looks at the technologies that are being developed to
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New BBC Documentary Full HD - Monster Black Holes National Geographic

National Geographic Documentary | Black Holes & Monsters of Universe | Science Documentary Full HD Black holes of stellar .

New BBC Documentary Full HD - Monster Black Holes National Geographic Travel to the edge of space and beyond to discover .

Somewhere, not farm from Earth, a star dies. It explodes in a violent supernova and leaves behind the strangest phenomenta in the Cosmos - a black hole.

National Geographic Documentary | Lake Monster of the North Full HD | Science Documentaries A lake monster (or, in Scotland, .

How the Universe Works - National Geographic The Universe - Space Discovery Documentary

How many planets are in the solar system? How did it form in the Milky Way galaxy? Learn facts about the solar system’s genesis, plus its planets, moons, and asteroids.

Cosmic Monsters: Black Holes (Nat Geo Space Documentary)

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Açıklama. A black hole is a geometrically defined region of spacetime exhibiting such strong gravitational effects that nothing—including particles and .

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Death by Black Hole - National Geographic Channel

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National Geographic Documentary 2015 Monster Black Holes Full Documentary 2015 HD

National Geographic Documentary 2015 Monster Black Holes Full Documentary 2015 HD
National Geographic Documentary 2015 Monster Black Holes Full Documentary 2015 HD
National Geographic Documentary 2015 Monster Black Holes Full Documentary 2015 HD
National Geographic Documentary 2015 Monster Black Holes Full Documentary 2015 HD
National Geographic Documentary 2015 Monster Black Holes Full Documentary 2015 HD
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Documentary 2015 - Black Holes and Cosmic Monsters Space FULL HD

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Deep Space: The Other Side Of A Black Hole - National Geographic The Universe Documentary 2017

Deep Space: The Other Side Of A Black Hole - National Geographic The Universe Documentary 2017

Simulation Reveals Spiraling Supermassive Black Holes

A new model is bringing scientists a step closer to understanding the kinds of light signals produced when two supermassive black holes, which are millions to billions of times the mass of the Sun, spiral toward a collision. For the first time, a new computer simulation that fully incorporates the physical effects of Einstein's general theory of relativity shows that gas in such systems will glow predominantly in ultraviolet and X-ray light.

Just about every galaxy the size of our own Milky Way or larger contains a monster black hole at its center. Observations show galaxy mergers occur frequently in the universe, but so far no one has seen a merger of these giant black holes.

Scientists have detected merging stellar-mass black holes -- which range from around three to several dozen solar masses -- using the National Science Foundation's Laser Interferometer Gravitational-Wave Observatory (LIGO). Gravitational waves are space-time ripples traveling at the speed of light. They are created when massive orbiting objects like black holes and neutron stars spiral together and merge.

Supermassive mergers will be much more difficult to find than their stellar-mass cousins. One reason ground-based observatories can't detect gravitational waves from these events is because Earth itself is too noisy, shaking from seismic vibrations and gravitational changes from atmospheric disturbances. The detectors must be in space, like the Laser Interferometer Space Antenna (LISA) led by ESA (the European Space Agency) and planned for launch in the 2030s.

But supermassive binaries nearing collision may have one thing stellar-mass binaries lack -- a gas-rich environment. Scientists suspect the supernova explosion that creates a stellar black hole also blows away most of the surrounding gas. The black hole consumes what little remains so quickly there isn't much left to glow when the merger happens.

Supermassive binaries, on the other hand, result from galaxy mergers. Each supersized black hole brings along an entourage of gas and dust clouds, stars and planets. Scientists think a galaxy collision propels much of this material toward the central black holes, which consume it on a time scale similar to that needed for the binary to merge. As the black holes near, magnetic and gravitational forces heat the remaining gas, producing light astronomers should be able to see.

The new simulation shows three orbits of a pair of supermassive black holes only 40 orbits from merging. The models reveal the light emitted at this stage of the process may be dominated by UV light with some high-energy X-rays, similar to what's seen in any galaxy with a well-fed supermassive black hole.

Three regions of light-emitting gas glow as the black holes merge, all connected by streams of hot gas: a large ring encircling the entire system, called the circumbinary disk, and two smaller ones around each black hole, called mini disks. All these objects emit predominantly UV light. When gas flows into a mini disk at a high rate, the disk's UV light interacts with each black hole's corona, a region of high-energy subatomic particles above and below the disk. This interaction produces X-rays. When the accretion rate is lower, UV light dims relative to the X-rays.

Based on the simulation, the researchers expect X-rays emitted by a near-merger will be brighter and more variable than X-rays seen from single supermassive black holes. The pace of the changes links to both the orbital speed of gas located at the inner edge of the circumbinary disk as well as that of the merging black holes.

The simulation ran on the National Center for Supercomputing Applications' Blue Waters supercomputer at the University of Illinois at Urbana-Champaign. Modeling three orbits of the system took 46 days on 9,600 computing cores.

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Credit: NASA's Goddard Space Flight Center

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NG: Гигантская черная дыра / Monster Black Hole (2008)

National Geographic: Гигантская черная дыра / Monster Black Hole (2008). HD
Режиссер: Томас Лукас
Производство: National Geographic (США)
Жанр: Документальный, науч/поп
Перевод: Профессиональный (многоголосый, закадровый)
Описание: Черные дыры во Вселенной - центры мощнейшей гравитации, поглощающие все на своем пути. Что мы увидим, если приблизимся к ним, пройдем точку невозврата и попадем в область искривления пространства и времени? Какие тайны и секреты Вселенной мы откроем, если отправимся к центру гигантской черной дыры?
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Monster Black Holes - New BBC Documentary 2015 HD

A black hole is a mathematically defined region of spacetime exhibiting such a strong gravitational pull that no particle or electromagnetic radiation can escape from it. The theory of
general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole.[2][3] The boundary of the region from which no escape is possible is called the event
horizon. Although crossing the event horizon has enormous effect on the fate of the object crossing it, it appears to have no locally detectable features. 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. Long considered a mathematical curiosity, it was during the 1960s that theoretical work showed black holes were a generic prediction of general relativity. The discovery
of neutron stars 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.

Despite its invisible interior, the presence of a black hole can be inferred through its interaction with other matter and with electromagnetic radiation such as visible light. Matter falling
onto a black hole can form an accretion disk heated by friction, forming some of the brightest objects in the universe. If there are other stars orbiting a black hole, their orbit can be used
to determine its 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 Sgr A*, at the core of our own Milky Way galaxy, contains a supermassive black hole of about 4.3 million M☉.


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Biggest Black Holes and Cosmic Monsters Space Documentary 2017

Biggest Black Holes and Cosmic Monsters - Space Documentary 2017 Astronomers have identified a mammoth black hole weighing as much as 12 billion suns.

Documentary Films 2017,Documentary 2017, Documentary National Geographic, national geographic documentary 2017,Documentary Channel,national .

Space Documentary | Cosmic Front : Monster Black Holes There are Black Holes, and then there are Monster Black Holes -- containing several million to ten .



Biggest Black Holes and Cosmic Monsters - Space Documentary 2017 Astronomers have identified a mammoth black hole weighing as much as 12 billion suns.

How the Universe Works - From The Big Bang To The Present Day - Space Discovery Documentary

How the Universe Works - From The Big Bang To The Present Day - 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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BBC Documentary 2017 ||The Universe Documentary A Quick Guide To Black Holes

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