DARK MATTER NOVA SCIENCE DOCUMENTARY Discovery Life Universe (full length documentary)
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From a single point - the big bang brought into being space, time and an expanding plasma cloud of Hydrogen: the primal element, from which came Helium in .
Nova is a United States popular science television series produced by WGBH Boston. It is broadcast on Public Broadcasting Service (PBS) in the U.S., and in .
[NOVA SpaceNow] DARK MATTER: Space PBS Documentary updat 2015 HD Dark matter is a hypothetical kind of matter that cannot be seen with telescopes .
Dark Matter and Dark Energy Documentary - Space Documentary 2017
BBC 2017 Dark Matter, Dark Energy the Invisible Universe HD, Full Documentary 2017
BBC 2017 Dark Matter, Dark Energy the Invisible Universe HD, Full Documentary 2017 The Documentary Video belongs to Documentary Detective and . Discovery Science Universe (documentary) nova.
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Universe Documentary -Biggest Black Holes - BBC Documentary 2017 || Documentray. Universe Documentary -Biggest Black Holes - BBC Documentary 2017 || Documentray. Monster Black Holes in the.
Dark Matter, Dark Energy and Death Of The Universe - Space Discovery Documentary
The heat death of the universe, also known as the Big Chill or Big Freeze,[1] is a conjecture on the ultimate fate of the universe, which suggests the universe would evolve to a state of no thermodynamic free energy and would therefore be unable to sustain processes that increase entropy. Heat death does not imply any particular absolute temperature; it only requires that temperature differences or other processes may no longer be exploited to perform work. In the language of physics, this is when the universe reaches thermodynamic equilibrium (maximum entropy).
If the topology of the universe is open or flat, or if dark energy is a positive cosmological constant (both of which are consistent with current data), the universe will continue expanding forever, and a heat death is expected to occur,[2] with the universe cooling to approach equilibrium at a very low temperature after a very long time period.
The hypothesis of heat death stems from the ideas of William Thomson, 1st Baron Kelvin (Lord Kelvin), who in the 1850s took the theory of heat as mechanical energy loss in nature (as embodied in the first two laws of thermodynamics) and extrapolated it to larger processes on a universal scale.
Science Documentary Dark Energy The Biggest Mystery in the Universe
Science Documentary -- Dark Energy The Biggest Mystery in the Universe.
Science Documentary | Dark Energy The Biggest Mystery in the Universe.
[Universe OST] Dark Energy: The Biggest Mystery in the Universe | Space & Universe Documentary Thank for watching! Don't forget to like and subscirbe.
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No Dark Matter Documentary HD
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Universe | Mysteries of No Dark Matter
Dark matter is a theorized form of matter that is believed to account for approximately 80% of the matter in the universe, and about a quarter of its total energy density. The majority of dark matter is thought to be non-baryonic in nature, possibly being composed of some as-yet undiscovered subatomic particles.[note 1] Dark matter has not been directly observed, but its presence is implied in a variety of astrophysical observations, including gravitational effects that cannot be explained unless more matter is present than can be seen. For this reason, most experts believe dark matter to be ubiquitous in the universe and to have had a strong influence on its structure and evolution. The name dark matter refers to the fact that it does not appear to interact with observable electromagnetic radiation, such as light, and is thus invisible (or 'dark') to the entire electromagnetic spectrum, making it extremely difficult to detect using usual astronomical equipment.
No Dark Matter? - Documentary 2018 HD
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Dark Matter The Unknown Force full documentary HD 2019
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Hubbles Amazing Discoveries[Space Documentary]HD
Hubble Space Telescope is awaiting one final shuttle servicing mission, but why is a telescope worth the risk? Hubble has made numerous discoveries, such as the birth of stars, the death of stars, the existence of black holes, the violence of a comet crash, charting Dark Matter clouds, and discovering 2/3rds of the Universe itself, in the form of mysterious Dark Energy. One day, the Hubble mission will end, and Hubble will burn up in the atmosphere. But a new telescope, the James Webb, will take its place among the stars.
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The Amazing World Of Gravity (Full Physics Documentary) | Spark
From the award-winning team that brought you The Secret Life of Chaos comes a unique television event on the physics of gravity, featuring unexpected historical insights, cutting-edge science and exciting new experiments.
With the brilliant Professor Jim Al-Khalili as our host, we visit the LIGO lab in the USA where gravity waves were discovered and uncover the latest theories about our cosmos that have come from studying the most intense sources of gravity imaginable – black holes.
Elsewhere, Jim even uses Albert Einstein’s theories of special and general relativity to work out how the rate at which you age is affected by gravity and the speed at which you move about.
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Mysterious Universe - NOVA Documentary HD (2019)
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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Monster BLACK HOLE | Full Documentary
Monster Black Hole traces the life cycle of a black hole, from its violent beginnings in the early universe, to its growth to supermassive proportions at the center of a galaxy, and its death in deep time.
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Is there a dark matter Documentary National Geography 2018
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Dark matter & Dark energy in hindi - Complete information | क्या हैं डार्क मैटर और डार्क एनर्जी
क्या हैं डार्क मैटर और डार्क एनर्जी (What is Dark Matter & Dark Energy). If you are searching for Dark Matter Kya hai or Dark energy kya hai?, it simply means you want to know about Dark Energy & Dark Matter in Hindi. It's an Educational video on Universe and Cosmology.
This Episode on Dark Matter and Dark Energy is in Hindi and explains these two complex entities in the best possible way. Here is a simple introduction of Dark Energy.
In physical cosmology and astronomy, dark energy is an unknown form of energy which is hypothesized to permeate all of space, tending to accelerate the expansion of the universe.
Dark matter is a hypothetical type of matter distinct from baryonic matter (ordinary matter such as protons and neutrons), neutrinos and dark energy. The existence of dark matter would explain a number of otherwise puzzling astronomical observations.
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The Secrets Of Quantum Physics (Full Astrophysics Documentary) | Spark
Professor Jim Al-Khalili traces the story of arguably the most important, accurate and yet perplexing scientific theory ever: quantum physics.
The story of quantum physics starts at the beginning of the 20th century with scientists trying to better understand how light bulbs work. This simple question soon led scientists deep into the hidden workings of matter, into the sub-atomic building blocks of the world around us. Here they discovered phenomena unlike any encountered before - a realm where things can be in many places at once, where chance and probability call the shots and where reality appears to only truly exist when we observe it.
Albert Einstein hated the idea that nature, at its most fundamental level, is governed by chance. Jim reveals how in the 1930's, Einstein thought he'd found a fatal flaw in quantum physics. This was not taken seriously until it was tested in the 1960s. Professor Al-Khalili repeats this critical experiment, posing the question does reality really exist, or do we conjure it into existence by the act of observation?
Elsewhere, we explore how the most famous law of quantum physics – The Uncertainty Principle – is obeyed by plants and trees as they capture sunlight during the vital process of photosynthesis. Could quantum mechanics explain the greatest mystery in biology - evolution?
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Dark Energy : Dark Matter : Dark Gravity
Dark energy and dark matter pervade the Universe.
Professor Alan Heavens looks at how we find their properties and tests whether Einstein's gravity theory works in his inaugural lecture.
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Public Lecture | Dark Matter: Detecting Gravity’s Hidden Hand
Dark matter is one of the most mysterious components of the universe. Yet it makes up 23 percent of the mass of the universe – six times the mass of ordinary, atomic matter. Physicists have never observed dark matter particles directly, but we see their influence throughout astronomy. The gravitational pull of this hidden matter is the force that created structure in the universe, shaping galaxies and forming the distribution of clusters and voids we see in the sky. One of today’s great challenges in physics is to observe individual dark matter particles coming in from the galaxy and striking particles on Earth. This talk presents the evidence for dark matter and introduces one of the most ambitious efforts to discover interactions of dark matter particles, using tons of cryogenic liquid in a deep underground laboratory.
About the Speaker:
SLAC Professor Tom Shutt has been searching for dark matter particles for most of his career. He received his PhD from UC Berkeley in 1993. In his graduate work there, he played a key role in developing low-temperature germanium detectors for dark matter searches. After terms as a research fellow at Berkeley and as an assistant professor at Princeton University, Shutt joined the faculty at Case Western Reserve University in 2005. At Case, he developed techniques for dark matter searches using detectors based on liquid xenon. He was co-founder of the LUX experiment, which is among the current world leaders in the search for the type of proposed dark matter particles called Weakly Interacting Massive Particles, or WIMPs. In 2014, Shutt and his collaborator Dan Akerib moved to SLAC to develop the truly large-scale liquid xenon WIMP detector LUX-ZEPLIN, or LZ.
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.