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How the Universe Works - Mysteries Of Our Place In The Milky Way- Space Discovery Documentary

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How the Universe Works - Mysteries Of Our Place In The Milky Way- Space Discovery Documentary

How the Universe Works - Mysteries Of Our Place In The Milky Way- Space Discovery Documentary

How the Universe Works - Mysteries Of Our Place In The Milky Way- Space Discovery Document

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How the Universe Works - Mysteries Of Mariana Trench - Space Discovery Documentary

How the Universe Works - Mysteries Of Mariana Trench - Space Discovery Documentary
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How the Universe Works Black Hole in the Milky Way - Space Discovery Documentary

Black Holes are known to swallow everything coming in their path but that's not the end. With time they they emit enormous amounts of energy.

In 2015 Hubble Telescope captured something that shocked the entire world. It was a burst of plasma jet 260 million light years away in space coming from an unknown source. Calculations showed that the jet was travelling at 98% the speed of light.

Scientists finally concluded that they have captured a plasma burst coming from a super-massive Black Hole. Which is located inside a galaxy 260 million light-years away
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How the Universe Works - Formation of the Solar System

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

How the Universe Works - The secrets of the Solar System - Space Discovery Documentary

New planets are now being discovered outside our solar system on a regular basis, and these strange new worlds are forcing scientists to rewrite the history of our own solar system. Far from a simple story of stable orbits, the creation of our solar system is a tale of hellfire, chaos and planetary pinball. It's a miracle our Earth is here at all.
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The Strongest Force In The Universe - Space and Science Documentary

A supermassive black hole is the largest type of black hole, containing a mass of the order of hundreds of thousands, to billions times, the mass of the Sun. This is a class of astronomical objects that has undergone gravitational collapse, leaving behind a spheroidal region of space from which nothing can escape; not even light.

Observational evidence indicates that all, or nearly all, massive 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.

Earth and the Milky Way - Discover the mystery - Space Documentary 2017

Earth and the Milky Way - Discover the mystery - Space Documentary 2017
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Structure of the Milky Way:
If you could travel outside the galaxy and look down on it from above, you’d see that the Milky Way is a barred spiral galaxy. For the longest time, the Milky Way was thought to have 4 spiral arms, but newer surveys have determined that it actually seems to just have two spiral arms, called Scutum–Centaurus and Carina–Sagittarius.
The spiral arms are formed from density waves that orbit around the Milky Way – i.e. stars and clouds of gas clustered together. As these density waves move through an area, they compress the gas and dust, leading to a period of active star formation for the region. However, the existence of these arms has been determined from observing parts of the Milky Way – as well as other galaxies in our universe.
The Solar System:
The Solar System (and Earth) is located about 25,000 light-years to the galactic center and 25,000 light-years away from the rim. So basically, if you were to think of the Milky Way as a big record, we would be the spot that’s roughly halfway between the center and the edge.
Astronomers have agreed that the Milky Way probably has two major spiral arms – Perseus arm and the Scutum-Centaurus arm – with several smaller arms and spurs. The Solar System is located in a region in between the two arms called the Orion-Cygnus arm. This arm measures 3,500 light-years across and is 10,000 light-years in length, where it breaks off from the Sagittarius Arm.

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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How the Universe Works - Blow your Mind of the Universe Part 11 - Space Discovery Documentary
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How the Universe works - Space time (Documentary)

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The Universe is all of space and time[a] and their contents, including planets, stars, galaxies, and all other forms of matter and energy. While the spatial size of the entire Universe is still unknown, it is possible to measure the observable universe.

The earliest scientific models of the Universe were developed by ancient Greek and Indian philosophers and were geocentric, placing Earth at the centre of the Universe. Over the centuries, more precise astronomical observations led Nicolaus Copernicus to develop the heliocentric model with the Sun at the centre of the Solar System. In developing the law of universal gravitation, Sir Isaac Newton built upon Copernicus' work as well as observations by Tycho Brahe and Johannes Kepler's laws of planetary motion.

Further observational improvements led to the realization that our Sun is one of hundreds of billions of stars in a galaxy we call the Milky Way, which is one of at least hundreds of billions of galaxies in the Universe. Many of the stars in our galaxy have planets. At the largest scale galaxies are distributed uniformly and the same in all directions, meaning that the Universe has neither an edge nor a center. At smaller scales, galaxies are distributed in clusters and superclusters which form immense filaments and voids in space, creating a vast foam-like structure. Discoveries in the early 20th century have suggested that the Universe had a beginning and that space has been expanding since then, and is currently still expanding at an increasing rate.

The Big Bang theory is the prevailing cosmological description of the development of the Universe. Under this theory, space and time emerged together 13.799±0.021 billion years ago[2] with a fixed amount of energy and matter that has become less dense as the Universe has expanded. After an initial accelerated expansion at around 10−32 seconds, and the separation of the four known fundamental forces, the Universe gradually cooled and continued to expand, allowing the first subatomic particles and simple atoms to form. Dark matter gradually gathered forming a foam-like structure of filaments and voids under the influence of gravity. Giant clouds of hydrogen and helium were gradually drawn to the places where dark matter was most dense, forming the first galaxies, stars, and everything else seen today. It is possible to see objects that are now further away than 13.799 billion light-years because space itself has expanded, and it is still expanding today. This means that objects which are now up to 46 billion light years away can still be seen in their distant past, because in the past when their light was emitted, they were much closer to the Earth.

From studying the movement of galaxies, it has been discovered that the universe contains much more matter than is accounted for by visible objects; stars, galaxies, nebulas and interstellar gas. This unseen matter is known as dark matter (dark means that there is a wide range of strong indirect evidence that it exists, but we have not yet detected it directly). The Lambda-CDM model is the most widely accepted model of our universe. It suggests that about 69.2%±1.2% [2015] of the mass and energy in the universe is a scalar field known as dark energy which is responsible for the current expansion of space, and about 25.8% [2015] is dark matter. Ordinary (baryonic) matter is therefore only 4.9% [2015] of the physical universe. Stars, planets, and visible gas clouds only form about 6% of ordinary matter, or about 0.3% of the entire universe.

There are many competing hypotheses about the ultimate fate of the universe and about what, if anything, preceded the Big Bang, while other physicists and philosophers refuse to speculate, doubting that information about prior states will ever be accessible. Some physicists have suggested various multiverse hypotheses, in which the Universe might be one among many universes that likewise exist.

(Review by Wikipedia)



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How the Universe Works - Black Hole - Space Discovery Documentary

Black Holes are known to swallow everything coming in their path but that's not the end. With time they they emit enormous amounts of energy.

In 2015 Hubble Telescope captured something that shocked the entire world. It was a burst of plasma jet 260 million light years away in space coming from an unknown source. Calculations showed that the jet was travelling at 98% the speed of light.

Scientists finally concluded that they have captured a plasma burst coming from a super-massive Black Hole. Which is located inside a galaxy 260 million light-years away
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How the Universe Works - Formation of the Solar System

How the Universe Works - National Geographic The Universe - Space Discovery Documentary
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Space Mysteries in our solar system Documentary

How the Universe Works - Mysteries Of Our Place In The Milky Way- Space Discovery Documentary 2018.

For more science and technology videos and documentaries, please subscribe to my channel SciencevesvesTechnology 4U In the years since man first ventured into space, scientific discoveries.

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How the Universe Works - Dark Future Of The Sun - Space Discovery Documentary

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Mysterious Universe - NOVA Documentary HD

For the first time, astronomers have used supermassive black holes from just after the Big Bang to measure the expansion rate of the Universe. Now, we have a bigger mystery on our hands than the answer this effort provided.


It turns out the Universe is growing faster than expected. This could mean that the dark energy thought to drive the acceleration of this expansion, also sometimes interpreted as the cosmological constant described by Albert Einstein, is not so cosmologically constant after all.

Instead, it could be growing stronger.

The Universe's rate of expansion is called the Hubble Constant, and it's been incredibly tricky to pin down. Every test seems to come up with a different result; recently, data from the Planck satellite that measured the cosmic microwave background set it at 67.4 kilometers (41.9 miles) per second per megaparsec, with less than 1 percent uncertainty.

Other methods typically involve the use of 'standard candles', objects with known luminosity such as cepheid variable stars or Type Ia supernovae, from which distance can be calculated based on their absolute magnitude.

Last year a cepheid variable star calculation of the Hubble Constant returned a result of 73.5 kilometers (45.6 miles) per second per megaparsec. So you can see why astronomers keep poking this weird cosmic bear.

But a few years ago, astronomers realized that the distance to another object could be calculated accurately, too. Enter quasars, along with their black holes.


Quasars are among the brightest objects in the Universe. Each is a galaxy that orbits a supermassive black hole actively feeding on a material. Its light and radio emissions are caused by material around the black hole, called an accretion disc, which emits intense light and heat from friction as it swirls like water circling a drain.

They also emit X-ray and ultraviolet light; and, as discovered by astronomers Guido Risaliti of Università di Firenze, Italy, and Elisabeta Lusso of Durham University, UK, the ratio of these two wavelengths produced by a quasar varies depending on the ultraviolet luminosity.

Once this luminosity is known, as calculated from that ratio, the quasar can be used just like any other standard candle.

And that means we can measure farther back into the Universe's history.

Using quasars as standard candles have great potential, since we can observe them out too much greater distances from us than Type Ia supernovae, and so use them to probe much earlier epochs in the history of the cosmos, Lusso said.

The researchers compiled UV data on 1,598 quasars from just 1.1 billion to 2.3 billion years after the Big Bang and used their distances to calculate the expansion rate of the early Universe.
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How the Universe Works The Discovery of Biggest Things Inside Our Universe (Documentary

How the Universe Works - Mysteries Of Our Place In The Milky Way- Space Discovery Documentary 2018.

How the Universe Works - National Geographic The Universe - Space Discovery Documentary 2017.

How the Universe Works - National Geographic The Universe - Space Discovery Documentary 2018.

How the Universe Works - National Geographic The Universe - Space Discovery Documentary 2018.

The Search For a Second Earth by The Science Channel. Buy How the Universe Works series on Discovery Store: ➡ American DocStation facebook page:

Mysteries Of Our Place In The Milky Way- Space Discovery Documentary

Mysteries Of Our Place In The Milky Way- Space Discovery Documentary

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.

How the Universe Works - Formation of the Solar System

The formation and evolution of the Solar System began 4.6 billion years ago with the gravitational collapse of a small part of a giant molecular cloud. Most of the collapsing mass collected in the center, forming the Sun, while the rest flattened into a protoplanetary disk out of which the planets, moons, asteroids, and other small Solar System bodies formed.

This model, known as the nebular hypothesis was first developed in the 18th century by Emanuel Swedenborg, Immanuel Kant, and Pierre-Simon Laplace. Its subsequent development has interwoven a variety of scientific disciplines including astronomy, physics, geology, and planetary science. Since the dawn of the space age in the 1950s and the discovery of extrasolar planets in the 1990s, the model has been both challenged and refined to account for new observations.

The Solar System has evolved considerably since its initial formation. Many moons have formed from circling discs of gas and dust around their parent planets, while other moons are thought to have formed independently and later been captured by their planets. Still others, such as Earth's Moon, may be the result of giant collisions. Collisions between bodies have occurred continually up to the present day and have been central to the evolution of the Solar System. The positions of the planets might have shifted due to gravitational interactions. This planetary migration is now thought to have been responsible for much of the Solar System's early evolution.

In roughly 5 billion years, the Sun will cool and expand outward to many times its current diameter (becoming a red giant), before casting off its outer layers as a planetary nebula and leaving behind a stellar remnant known as a white dwarf. In the far distant future, the gravity of passing stars will gradually reduce the Sun's retinue of planets. Some planets will be destroyed, others ejected into interstellar space. Ultimately, over the course of tens of billions of years, it is likely that the Sun will be left with none of the original bodies in orbit around it
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The Milky Way Facts About The Milky Way Galaxy Universe Documentary

How the Universe Works - Mysteries Of Our Place In The Milky Way- Space Discovery Documentary 2018.

A beautiful documentary, from 2017, that might just teach you something about our Milky Way Galaxy.

How the Universe Works | Black Hole in the Milky Way - Space Discovery Documentary 2018.

In this edition of “The Space Tour”, we are going to present you the facts and information about the milky way galaxy i.e., find out all about the milky way galaxy. Watch The Milky Way.

BBC Documentary History | National Geographic : Milky Way Galaxy - Universe documentary.

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