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Journey to a Black Hole - Uncovering a Mystery | SPACETIME - SCIENCE SHOW

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  • Black Hole

    2:20

    Black Hole - Uncovering a Mystery

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  • What Would a Journey to the Black Hole Be Like?

    10:16

    Today, I'm setting off on a journey toward the nearest black hole. But don't worry - I'll keep you in the know by live-streaming my entire adventure! I'll have someone to talk to during the flight, and he can help me if things get really tough! My travel buddy's name is Liam. Liam is a robot with artificial intelligence.

    Space distances are seriously long. That's why traveling there would take way more time than you'd like to spend on the road! For example, Voyager 1, a space probe launched in 1977, was traveling out of the Solar System at a speed of 40,000 miles per hour. If my spacecraft moved at the same speed, it would take me a whole 77,000 years to get to the nearest star! But luckily, my spaceship is much faster than that. So let the journey begin!

    Other videos you might like:
    The Solar System Is Not Like You Think It Is
    The Alien Signals Mystery Might Have Been Solved
    A Mysterious Object Punched a Hole in the Milky Way, Scientists Are Confused

    TIMESTAMPS:
    The most expensive single object in the world 1:28
    Low and high satellites 2:29
    240,000 miles away from Earth ???? 3:22
    What an astronomic unit is 4:33
    Outside of the Solar System ☀️ 6:28
    The point of no return 7:18
    Goodbye, Liam! ???? 8:03

    #space #blackhole #brightside

    SUMMARY:
    - The International Space Station is the most expensive single object in the world. This money would buy you 250 Boeing 747s or two Louvre's with all the paintings and artwork inside!
    - Among satellites, there are low and high flyers. And while the lowest flying ones move approximately 1,250 miles away from Earth, the highest reach 22,000 miles into space.
    - Space distances are so vast, you can't even calculate them in miles. That's why scientists use the term astronomic unit, which equals 93 million miles – the distance from the sun to Earth. That means I'm 9.3 billion miles away from our planet!
    - There's another trial ahead - the Oort Cloud. That means two things: first - we're on the outskirts of the Solar System; and second - we'll have to get through a cloud of icy objects orbiting the Sun at a distance of a 100,000 astronomic units!
    - We're heading out of the Solar System just one-tenth of a light-year later. By the way, if you were trying to reach this point by car, the trip would take you more than 19 million years.
    - In the center of pretty much every galaxy, there’s a supermassive black hole. For example, one is sitting right at the heart of our Milky Way galaxy, about 27,000 light-years away from Earth.
    - A black hole is an eerie place where those laws of physics we studied at school stop working. If a massive star runs out of its star fuel, it becomes super-dense and buckles under its own weight, collapsing inward and bringing space-time along.
    - I won't go further than the horizon, aka the point of no return. Once an object crosses this invisible line, it can't turn back, even if it's changed its mind.
    - Liam says he's ready to start his journey. There he goes, bravely plunging toward the black hole while I'm recording everything that's happening to him.
    - Liam just froze, as if a gigantic finger has pressed a pause button, and now, some force is stretching him thinner and thinner!
    - It's the infamous spaghettification, which happens in a super-strong non-homogenous gravitational field!
    - Liam is in a state of free-fall now, and feels no more stretching, scalding radiation, or gravity. Unfortunately, the connection is lost, and he can't tell me anything about the inside of the black hole.

    Music by Epidemic Sound

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  • An Epic Journey to a Black Hole to Give You Goosebumps

    8:26

    A black hole is a mysterious place where the laws of physics people are familiar with stop working. Black holes appear when massive stars collapse under their own weight. The gravitational field of the newly formed object is so powerful that even light, including X-rays, can't escape it. Every black hole has an invisible line-in-the-sand. Cross it - and you won't be able to escape, even if you're a beam of light. Beyond the point of no return, the gravity is just too strong. It's called the event horizon.

    There's a black hole about 1,000 light-years away from the Earth. That's almost 6 thousand, million, million miles. On the scale of the Universe, it's right next door. More than four times the mass of our Sun, this medium-sized monster is surrounded by streams of gas. There are two stars nearby. Scientists think this newly discovered black hole might be the nearest to Earth. It’s also the only system with a black hole visible to the unaided eye. Good news - you're going to visit it right now!

    #brightside

    TIMESTAMPS:
    Nearest black hole to Earth 0:01
    International Space Station 0:53 ????
    The Moon 1:20 ????
    Mars 1:36
    Jupiter 2:02
    Saturn 2:17
    The Kuiper Belt 2:43
    The Oort Cloud 3:14
    ⚫ You reach your destination! ⚫ 3:50
    How to see the back of your head 5:01
    What's behind the event horizon ❓6:24
    What happens after spaghettification ???? 7:16

    Music by Epidemic Sound

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  • Journey to the Black Holes Center

    8:31

    The nearest black hole is 1,011 light-years away. This black pearl was found in the solar system HR 6819. It was hidden in orbit with two other stars, which you can see with the human eye. Scientists have been studying this system since the 80s, but this winter, it revealed its main secret. This particular black hole is considered relatively small. But despite this, its mass is four times bigger than our Sun, and it’s 2,500 light-years closer to Earth than the next nearest black hole.

    If we were to make a model where the Earth’s distance to the Sun was only .05 inches, you would have to travel about 4 miles to get to this black hole. But our galaxy, the Milky Way, is about 100,000 light-years wide. So the distance of 1,011 light-years doesn’t seem that long in comparison. But before you jump inside this black giant, you should understand that a journey to such a dangerous object as a black hole is a one-way ticket...

    #brightside

    TIMESTAMPS:
    The way black holes are born 1:31
    Event horizon 2:28
    The effect of slowing time 3:28
    Hawking radiation 4:30
    The point of no return 5:06
    Where the laws of physics stop working 6:21
    Is it a wormhole? 6:59

    Music by Epidemic Sound
    ES_A Bit of Power - Soara.mp3
    ES_No Stone Unturned - Brendon Moeller.mp3
    ES_Rings of Jupiter - Valante.mp3
    ES_Vivid Space - Locus Clouds.mp3
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  • What Actually Happens When You Drop Something into a Real Black Hole?

    14:32

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    In this video I show you what it actually looks like to drop different things into a black hole! I talk about gravitational lensing, gravitational time dilation and gravitational red shifting. All of this to show you what it would actually look like to watch something fall into a black hole.

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    For more awesome videos checkout:What Happens If You Fly a Drone In An Elevator? Real Experiment!


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    Amazing experiment actually makes black fire


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    The Worlds Blackest Black vs The Worlds Brightest Flashlight (32,000 lumen)—Which Will Win?


    How Much Weight Can a Fly Actually Lift? Experiment—I Lassoed a Fly!


    DISCLAIMER: Any experiment you try is at your own risk

  • THE DARK SIDE - Black Holes And Invisible Matter | SPACETIME - SCIENCE SHOW

    50:02

    We are surrounded by dark matter and dark energy. Mysterious forces that permeate the universe and play a fundamental role in determining its evolution. Scientists can observe the effects of these cosmic enigmas. But as yet, they have found nothing.

    Space, an infinite vastness. But there's nothing in it. In a volume of about 13,000 by 13,000 by 13,000 kilometers, which is roughly the volume of the earth, there's the mass equivalent of a small grain of sand. Not only that, when you examine this grain of sand, you find it consists of ghostly particles. Particles that pass through everything without leaving behind a trace. And then there's dark energy. What exactly are dark matter and dark energy?

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    #DarkEnergy #DarkMatter #SpaceTime

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  • What If You Fell Into a Black Hole?

    4:55

    What would the outcome be if you took a leap of faith straight into a black hole? We looked to Einstein and Hawking to ponder the scenario.

    Say one day you were exploring space looking for a new planet for humans to inhabit, but came across a black hole and decided – why not check it out? Would you have any chance of survival? How would you get out if at all? Would you find a shortcut to another universe? Watch the video to learn about what would happen if you fell into a black hole.

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    Imagination will often carry us to worlds that never were. But without it, we go nowhere. — Carl Sagan

  • Black Holes 101 | National Geographic

    3:12

    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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    #NationalGeographic #BlackHoles #Educational

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    National Geographic is the world's premium destination for science, exploration, and adventure. Through their world-class scientists, photographers, journalists, and filmmakers, Nat Geo gets you closer to the stories that matter and past the edge of what's possible.

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  • Astronomers Mightve Found a White Hole

    7:14

    What do black holes do? What do black holes really look like? The existence of black holes was predicted over a century ago with nothing but math equations. Now we’ve taken the first photo of one. But black holes still hold plenty of secrets. Like their even more mysterious mirror twins: white holes!

    Imagine if we could record a black hole on video. Watch it pull in and consume any matter that gets too close, even light itself! Now take this recording and play it backward – this is what a white hole should be: the black hole’s “pushing away and matter-spewing” counterpart.

    #spacefacts #blackhole #brightside

    Other videos you might like:
    13 Scariest Theories That'll Make Your Blood Run Cold
    A Mysterious Object Punched a Hole in the Milky Way, Scientists Are Confused
    What Would a Journey to the Black Hole Be Like?

    Music by Epidemic Sound

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  • 15 Black Hole Facts That SCARE Astronomers | Space Discoveries 2020

    9:09

    These facts about black holes are part of the best space discoveries 2020. A black hole is just one space discovery. Space and the universe are beautiful and have a lot more to offer. Supermassive black holes wander the universe looking for more to swallow!

    #space #blackholes #discoveries

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  • What Happens If You Fall Into A Black Hole? CRAZY HYPOTHESIS

    7:41

    #eldddir #eldddir_space #eldddir_homo

  • Theyve Found Black Holes in the Atlantic Ocean

    9:30

    The world ocean covers more than 70% of the Earth’s surface, contains 97% of its water, and is filled to the brim with mysteries. Bright red tides, sound anomalies, bizarre creatures lurking in the ocean’s depths. One of these enigmas stands out among the rest: are there indeed black holes in the Atlantic Ocean?

    A black hole has such an enormous gravitational pull that once something gets pulled in, it doesn't have any chance to escape. Even light can’t get out of a black hole. Ocean “black holes” seem to be as powerful as their space relatives. But what do they do?

    Other videos you might like:
    Why the Atlantic and Pacific Oceans Don't Mix
    If You See Square Waves, Get Out of the Water!
    What Would a Trip to the Mariana Trench Be Like?

    TIMESTAMPS:
    Red Tide 0:27
    Milky Sea Phenomenon 1:05
    Green Flashes 1:58
    Steaming Sea 2:48
    Underwater Waterfalls 3:22
    The Bloop Sound 4:16
    Black Holes in the Ocean 5:13
    Brinicles 7:03
    Underwater Crop Circles 8:17

    #blackhole #brightside #ocean

    SUMMARY:
    - During a red tide, a gallon of seawater can contain millions of algae, which is extremely dangerous for birds, marine animals, and even us, people! Red algae can mess with breathing, and eating fish and shellfish caught in the red tide can lead to bad food poisoning!
    - Milky Sea Phenomenon mostly happens in the Indian Ocean’s waters. Scientists haven't agreed yet about the source of the enigmatic glow. The most popular idea, though, is that the ocean starts to gleam when countless glow-in-the-dark bacteria gather in one place.
    - You’re more likely to see green flashes at sunset than at sunrise. They appear when the atmosphere bends sunlight, passing through it, and separates it in different colors, just like a prism splits the light into tiny rainbows.
    - Frost smoke, sea smoke, steam fog - this phenomenon has many names. On a cold day, you can see the ocean literally smoking! It has nothing to do with fire though.
    - The world’s biggest waterfall is actually underwater c (however confusing it may sound). The Denmark Strait Cataract - that’s the name of this mind-boggling phenomenon - lies beneath the Denmark Strait that separates Greenland and Denmark.
    - For the first (and only) time, the Bloop was recorded in 1997. This minute-long, low-frequency sound was coming from the southern coast of Chile, and it was so deafeningly loud that underwater microphones as far as 3,000 miles away could hear it.
    - Ocean eddies are massive whirlpools that are spinning against the main current. They usually swirl billions of tons of water, and most of them are larger than a city.
    - Remember icicles hanging from your house’s roof gutter on a sunny winter day? Now, imagine the same icicle but with length measuring not in inches but in feet and made not from rainwater but from super-salty seawater called brine.
    - For the first time, underwater crop circles were spotted in 1995 close to Japan’s southern coast. Imagine the researchers’ surprise when it turned out to be a male pufferfish! A male is swimming inside the circle digging valleys in the sand with its fins.

    Music by Epidemic Sound

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  • Is A Giant Black Hole Headed Towards Earth?

    12:46

    Is A Giant Black Hole Headed Towards Earth?
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    Black holes are real, and they are out there in the darkness of space. They destroy and devour anything that gets too close to them. And what if we were to tell you that a supermassive black hole might be headed in Earth’s direction right now as we speak?

    Yes, we said ‘supermassive...

    Normal black-holes, or ‘Stellar Mass Black Holes’, form from the collapse of massive stars as their life comes to an end. Every galaxy is full of them, scattered from top-to-bottom. But Supermassive Black Holes are found only at the very center of a galaxy. While a regular black hole has a mass a few times that of our sun, a ‘Super Massive’ can have a mass as million times or MORE than that of our Sun. While a ‘Stellar Mass’ has a gravitational influence of just its immediate surroundings, a ‘Supermassive’ is wide-reaching, stretching across the entire galaxy it rests in. 

    #earth #space #black #hole #blackhole #gravity #ridddle #universe #spacex #mars

  • SILENT COMPANIONS - Moons In Our Planetary System | SPACETIME - SCIENCE SHOW

    50:02

    Since the beginning of time, the moon has been our loyal companion in the sky. But other planets also have satellites, more so than Earth. The silent companions of the planets are fascinating worlds of their own and there could even be candidates for extraterrestrial life among them.
    But what are moons really, how did they come about and do they actually even carry primitive life? In this new SPACETIME episode, astronaut and scientist Ulrich Walter is dedicated to the silent companions in our planetary system.

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    #moons #planetarysystem #SpaceTime

  • Scientists Found a New Planet, but It Suddenly Vanished

    8:25

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    The Hubble Telescope orbits our planet, looking out at the big unknown universe. Since it’s out of our atmosphere, the Hubble can see way further than telescopes on land. No clouds up there. This guy helped us confirm the theory about supermassive black holes in the centers of galaxies. It also discovered a whole bunch of new galaxies, including the world's oldest one, which is about 8 billion years older than our Milky Way!

    But let’s travel 25 light-years away to another special star. Fomalhaut. It's almost twice as big and heavy as the Sun. If you look at it from far away, you can see a bright yellow disk around it. It’s a debris disk, full of bits of space rock, and it’s huge. Scientists were curious about it, was all this space dust gonna get smooshed together and become a planet one day? But then they saw something else! Right there, through all that debris, was a massive mysterious object...

    #brightside
    Music by Epidemic Sound

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  • The Black Hole | Future Shorts

    2:49

    A sleep-deprived office worker accidentally discovers a black hole - and then greed gets the better of him...
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    'The Black Hole' (UK, 2008)
    Dir.: Phil Sampson and Olly Williams (Phil and Olly)

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  • Whats Inside A Black Hole? | Unveiled

    9:16

    What's Inside A Black Hole?
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    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.

  • Scientists Dug the Deepest Hole But Something Broke Their Drill

    10:02

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    The Guinness World Records award for the deepest human invasion into the Earth's crust goes to the Kola Superdeep Borehole. Its depth is 7.4 mi. You can find it in the icy part of Russia where the winter temperature of -40°F is a common thing. Local scientists started to dig it in the 1970s. The grand plan was to reach the depth of 9.3 mi. It was a purely scientific project to study the Earth's crust and maybe get to the hot mantle.

    Up to the depth of 4.3 mi, the drill easily coped with granite rock. Then, denser layers came and broke the drill. The scientists had to change the drilling pattern. In the end, it resembled a tree with many branches. The deeper it went, the hotter it became. The temperature went up to 350°F. The equipment was constantly out of order and work was stopped completely in 1992. The place is now abandoned, overgrown with moss and rust. But it has its fair share of myths surrounding it too...

    #brightside

    TIMESTAMPS:
    The Kola Superdeep Borehole 0:06
    A hole in the bottom of the ocean 3:46
    The enchanting brilliance of diamonds 5:13
    The longest oil wells 6:25
    The largest diamond in North America 7:06
    The deepest water well in the world 8:14
    The deepest underground station 8:35
    The deepest point in the ocean 8:54
    How to dig water? 9:32

    Music by Epidemic Sound

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  • First Image of a Black Hole!

    5:29

    The Event Horizon Telescope Collaboration observed the supermassive black hole at the center of M87, finding the dark central shadow in accordance with General Relativity, further demonstrating the power of this 100 year-old theory.

    To understand more about why the shadows look the way they do, check out:

    I will continue updating this description with more links.

    Event Horizon Telescope collaboration:

    Animations and simulations with English text:
    L. R. Weih & L. Rezzolla (Goethe University Frankfurt)


    Video of observation of M87 courtesy of:
    C. M. Fromm, Y. Mizuno & L. Rezzolla (Goethe University Frankfurt)


    Video of observation of SgrA* courtesy of
    C. M. Fromm, Y. Mizuno & L. Rezzolla (Goethe University Frankfurt)
    Z. Younsi (University College London)


    Video of telescopes in the array 2017:
    C. M. Fromm & L. Rezzolla (Goethe University Frankfurt)


    Animations and simulations (no text):
    L. R. Weih & L. Rezzolla (Goethe University Frankfurt)


    Special thanks to Patreon supporters:
    Donal Botkin, Michael Krugman, Ron Neal, Stan Presolski, Terrance Shepherd, Penward Rhyme

    Scale animation by Maria Raykova

  • 12 Most Incredible Finds That Scientists Still Cant Explain

    14:46

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    We love a good mystery. As fascinating as it is when an archaeologist pulls something out of the ground and is immediately able to tell us all about what it is, and what it says about the people who came before us, we're much more excited when they come across something they can't explain. Even with all our current technology, the amount of information we're missing about our ancestors and the way they lived is startling. Perhaps we'd understand them a little better if we correctly understood the purpose of the strange artifacts you're about to see in this video!

    For all questions contact us at: amazingstockchannel@gmail.com

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  • How We Discovered the Milky Ways Black Hole

    7:23

    This video was sponsored by Coursera. Go to Coursera to check out their courses, like IBM’s Data Science Professional Certificate: The first 100 people to enroll in the IBM Data Science certification before the end of July will get their first month for free.

    The search began with a physicist checking for sources of static on phone calls in the 1930s, but it took several decades to finally make one of the biggest discoveries in astronomy, Sagittarius A*.

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  • What If You Fell Into the Deepest Hole on Earth?

    6:01

    This is the deepest hole mankind has ever dug. It's a straight drop into the bowels of the Earth. For 20 years, Russian scientists and engineers drilled deeper and deeper, hoping to uncover whatever mysteries the hole may hold, earning it the ominous nickname of The Well to Hell. What would happen if, for whatever reason, you fell into this hole? What would happen to your body? How deep would you fall?

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    What If is a mini-documentary web series that takes you on an epic journey through hypothetical worlds and possibilities. Join us on an imaginary adventure — grounded in scientific theory — through time, space and chance, as we ask what if some of the most fundamental aspects of our existence were different.

  • What If a White Hole and Black Hole Collided?

    4:59

    Black holes are one of the most devastating objects in space, sucking up everything around them. But there's another space phenomenon that's just as destructive, and it's known as a white hole. Now, what would happen if these two objects met in space and fought each other? How could something like this happen? Who would win? And what is a white hole anyway?

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  • Incredible Recent Discoveries in Antarctica!

    11:14

    The Moon rotates around the Earth at about the same speed, as it does around its axis, that’s why we can only see one side of it. It means that 41% of its surface hasn’t been explored yet! This fact surprises many people, as we are used to thinking that we know everything about all things in the world. While even our own planet remains a mystery to us.

  • Stephen Hawking Discovers The Black Hole Theory | The Theory Of Everything | SceneScreen

    3:25

    Stephen Hawking and his professor Dennis Sciama attend a lecture on black holes and Stephen comes to the conclusion that those black holes may have been part of the creation of the universe, and decides to write his thesis on them.

    The Theory Of Everything (2014) SYNOPSIS: Stephen Hawking, an excellent astrophysics student working on his research, learns that he suffers from motor neurone disease and has around two years to live.

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  • Is Time Travel Possible? | The Science of Doctor Who | Doctor Who

    4:08

    Is Time Travel really Possible? In this clip Professor Brian Cox - a confirmed Doctor Who fan - undertakes an experiment to see. Subscribe:

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  • Dark Matter findings suggest Einstein’s Theory of Relativity “may be wrong” - BBC News

    2:45

    Dark matter is perhaps the most mysterious substance in the universe.

    Little is known about it. Scientists are pretty sure it exists but don't know exactly what it is.

    Yet it is fundamental to their explanation of the Universe. They believe it permeates space and amounts to around 80% of all matter.

    Dark matter does not emit or absorb light but is subject to the effects of gravity. Because of that, astronomers can measure the way it distorts light from distant stars.

    Now for the first time they have mapped the distribution of dark matter in the Universe. However the findings have deepened the mystery because they seem to contradict Einstein’s Theory of Relativity, one of the central pillars of modern physics.

    Sophie Raworth presents BBC News at Ten reporting by science correspondent Pallab Ghosh.

    Please subscribe HERE

    #BBCNews

  • What Is a White Hole?

    10:01

    If you have never heard of a White Hole in space, then you are not alone. This white hole is even more rare than a black hole and it's properties are almost the exact opposite of a black hole. Check out today's new video for a more scientific explanation on the crazy space phenomenon of white holes!

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  • The Most Powerful Black Holes in the Universe 4k

    48:01

    The study of extreme physics brought us the bomb. It has taken us inside the violent death of a star. Now, it has brought us face to face with the most destructive force in Nature: a supermassive black hole. How large, how powerful, can these monsters get? What can they tell us about the extremes of time and space?

  • NASA Captured First Ever Image of a Black Hole!

    1:45

    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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    Credits: NASA, ESO

  • Minecraft, But A Black Hole Grows Every Second...

    19:04

    Minecraft, But A Black Hole Grows Every Second...
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    This is a custom coded 1.14 / 1.15 survival challenge. My friends and I try and beat the game before the black hole destroys and consumes the entire world and all the blocks in it. This was super funny and also super fun.

    Can I beat the enderdragon?

    Want to see this again? Like the video and we'll make it a series!

    Minecraft But challenge

  • 15 MOST Mysterious Space Discoveries

    19:26

    Space is a mysterious place! Today we're taking a look at some of the most mysterious discoveries in outer space.

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  • The search for dark matter -- and what weve found so far | Risa Wechsler

    15:44

    Visit to get our entire library of TED Talks, transcripts, translations, personalized Talk recommendations and more.

    Roughly 85 percent of mass in the universe is dark matter -- mysterious material that can't be directly observed but has an immense influence on the cosmos. What exactly is this strange stuff, and what does it have to do with our existence? Astrophysicist Risa Wechsler explores why dark matter may be the key to understanding how the universe formed -- and shares how physicists in labs around the world are coming up with creative ways to study it.

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  • What is Dark Matter and Dark Energy?

    6:21

    What is dark energy? What is dark matter? Well, if we knew exactly we would have a nobel prize – we know that they exist though. So what do we know about those strange things?

    Check out THE NOVA PROJECT to learn more about dark energy:

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  • Journey to a Black Hole - Uncovering a Mystery | SPACETIME - SCIENCE SHOW

    47:29

    We are surrounded by an intangible infinity: a universe in which the Earth is merely a grain of sand on the shore of an ocean. But we are unravelling more and more of the secrets of the universe which surrounds us. And that includes black holes, bottomless pits like the jaws of hell which devour all material that comes too close to them. Even light has no chance of escaping from them. But how does a Black Hole form? Are there any near us? And can they pose a threat to us? A look at the universe presents us with pictures of fascinating and confusing beauty: landscapes of light and gas and stardust, formed by cosmic wind and radiation. Our telescopes are discovering more and more wonders of the universe. They are looking far out into space and thus far back into the past. The centre of our galaxy is marked by a super-heavy Black Hole: an astronomical object with an inconceivable gravitational pull. Nothing can escape from it. The black hole at the centre of our galaxy is known as Sagittarius A-star. Of enormous size, it devours everything while remaining totally invisible.

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    #BlackHole #Universe #Spacetime

  • What is a black hole?

    7:59

    Are your kids wondering: “What is a black hole?” This question came from Sammy, a 5th Grader from the US. Like, share and vote on next week's question here:

  • How close could an astronaut get to the sun?

    4:33

    Are your kids wondering: How close could an astronaut get close to the sun? This question came from Lara, a 3rd Grader from Germany. Like, share and vote on next week's question here:

  • What If the Large Hadron Collider Made a Black Hole?

    11:07

    Making a black hole in a particle accelerator sounds… a bit dangerous, to say the least, but scientists think that it could be possible! Here's why it probably wouldn't be dangerous -- and might even teach us something.

    Hosted by: Hank Green

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  • NASA Science Live: Black Hole 101

    28:41

    How do we study black holes if we can’t even see them? Could a black hole “eat” an entire galaxy? What would happen if you fell into a black hole? Join experts on #NASAScience Live as we take a journey to explore these mysterious objects that can be found all over the universe.

  • 15,000 Perfectly Circular Holes Appeared on the Ocean Floor off the California Coast

    10:58

    #eldddir #eldddir_earth #eldddir_ocean

  • Strange Properties of Spinning Black Holes - Kerr Metric, General Relativity, Physics Explained

    8:54

    Hey everyone, I'm back with a video about black holes! This time, we're talking about spinning (rotating) black holes, and their rather interesting characteristics.

    The mathematical (and theoretical) properties of a rotating black hole are described by the Kerr metric. This metric is a solution of Einstein's Field Equations, thought to be a good description of our universe on the large scale. Just like how the Minkowski metric describes empty, flat spacetime, and the Schwarzschild metric describes the spacetime around a stationary black hole, the Kerr metric describes the spacetime around a rotating black hole.

    Something worth discussing is the event horizon of the black hole we happen to be studying. This is the boundary around the hole, beyond which not even light can escape. If any object is closer to the centre of the black hole than the event horizon, then it's not coming back. A strange (but mathematically accurate) way to think about this behaviour is like time and space reversing properties. Outside the event horizon, you can only move in one direction in time (forward) but multiple directions in space. Inside the event horizon, you can only move in one direction in space (toward the centre of the black hole) but time travel may be possible there.

    For a stationary black hole, the event horizon is spherical. For a rotating black hole it's an oblate spheroid - basically a sphere that's been squished at the poles of the rotating axis, and stretches further out at the equator. But rather more interestingly, the Kerr metric suggests that there should exist another event horizon inside the one we have been discussing so far. This inner horizon is slightly problematic for a couple of reasons. Firstly, we currently have no way of probing whether or not it exists, because not even light can escape the outer horizon. Secondly, the Kerr metric is technically only accurate for the spacetime outside our black hole. But if we extend the mathematics to inside the black hole, we find that it tells us an inner horizon may exist.

    The Kerr metric also suggests the existence of another important surface, outside the event horizon. This surface is known as the stationary limit surface. Any object crossing this surface must move with the same sense as the rotation of the black hole. In other words, an object is inside the stationary limit surface, and the black hole is rotating anticlockwise / counterclockwise, then the object cannot rotate clockwise. Interestingly, particles that are inside the stationary limit surface but outside the event horizon, are in a region known as the ergosphere. This region is called the ergosphere because we can actually extract energy or work from the rotating black hole (ergon = work). This happens because particles in the ergosphere can pick up rotational energy from the black hole, having been forced to rotate with the same sense of the black hole, and then escape the black hole (since they haven't yet fallen into the event horizon), taking the energy away from the hole. The rotation of the black hole diminishes as a result. This energy extraction method is known as the Penrose Process, and I'd like to make a separate video about this at some point.

    Another interesting idea we can glean from the Kerr metric is that a rotating black hole has a different kind of singularity at its centre than a stationary one. A singularity is a region of infinite density, where mass is extremely tightly packed into basically zero space. A stationary black hole has a small point singularity at its centre. But it seems like a rotating black hole has a ring singularity - a ring shaped region where mass is extremely tightly packed.

    The Kerr metric states that as a black hole rotates faster and faster, the (outer) event horizon gets smaller. Eventually, the horizon ceases to exist, and we're left with a naked singularity. This is a singularity that we can theoretically observe, because there is no event horizon to prevent particles from reaching an observer elsewhere in space. However, Penrose came up with a hypothesis known as the Cosmic Censorship Hypothesis to suggest why we may never be able to observe a naked singularity. I'd like to save this discussion for another video too.

    In this video we discuss rotating, uncharged black holes. Previously I've discussed stationary uncharged black holes. In future videos, I'd like to talk about stationary and rotating charged black holes too.

    Thanks so much for watching, please subscribe and hit the bell button if you enjoyed this video. Check out my socials:

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  • No firewalls around black holes | SpaceTime with Stuart Gary S21E63 | Astronomy Podcast

    30:50

    The world’s premier astronomy and space science podcast.
    *No firewalls around black holes
    Scientists skeptical about the black hole firewall hypothesis say their calculations have found a flaw in the firewall argument.

    *First successful test of General Relativity near a supermassive black hole
    There’s an old saying in physics – it never pays to bet against Albert Einstein. And that’s been proven right yet again with observations of stars orbiting the supermassive black hole at the centre of the Milky Way galaxy -- confirming Professor Einstein’s General Theory of Relativity.

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    *East coast meteor seen by thousands
    The east coast of New South Wales has witnessed a spectacular celestial show with a fireball streaking across the evening sky.

    *Virgin Galactic VSS Unity undertakes its third rocket powered flight
    Virgin Galactic’ space plane -- the VSS Unity – has carried out its third powered test flight.

    You tube video url:

    *SpaceX launches seventh Iridium mission
    SpaceX has successfully placed ten more Iridium Next telecommunications satellites into orbit just three days after launching its largest ever payload – the Telstar 19 Vantage.

    You tube video url:

    *The Science Report
    A new type of anti-cancer drugs that put cancer cells into a permanent sleep.
    Critically endangered swift parrot threatened with extinction due to politicians bureaucrats and loggers.
    Just 13 per cent of the world's oceans still classified as wilderness.
    Confirmation that dogs show empathy when their owners are in distress or trouble.

    The skeptic’s guide to Skepticon 2018.

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  • Top 10 Scary Black Holes Discovered

    10:19

    Top 10 Scary Black Holes Discovered
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    One of the most mysterious things in the universe, what the heck is going on in black hole besides a bunch of gravity sucking everything in? Honestly dude I have no idea because I'm not smart enough but I am smart enough to put together a list of the scariest ones found out in the deep dark reaches of spaces.

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  • Space-time Singularity | Black hole Technical Series

    22:56

    Hello & Welcome Guys, I am Aditya Pawar; And Lets start our Journey to the Universe!!
    In this Video I goin to talk about Singularities, Mathematical Singularities & Physical Singularities.
    See My earlier video in this Technical Series:-
    See the Playlist to Black hole Technical Series:-

    Singularities are a Region of 3-d or higher Space-times(Euclidean Space-time, Minkowski Space-time etc), in these region of Space-Times the Gravitational Force exerted upon objects which are nearby their Vicinity, Hence, the Region of Space-Time Where the Universal Fabric of Space-time tends to curve upon, Because of the Immense Gravitational force, which tend to be its own source, as the energy is given to this Curved space-time, the curvature forms itself continuously with the help of Gravity; this is a phenomenon predicted by Sir Isaac Newton in the early 1600s, that If any object which tend to have some mass, also has its own Gravity, in these terms, we can say that Mass is Proportional to Gravity(Mass ∝ Gravity), Black hole Singularities were first ever taken into Theory by Roger Penrose & Stephen Hawking in 1960's Penrose-Hawking Singularity Theorems which Formulated the Gravitation in Singularities, hence, Roger Penrose was awarded the Nobel Prize for Physics on 6th October 2020, shared with Reinhard Genzel & Andrea Ghez for Finding the Light cone Behaviors in the Ergosphere of Black holes.
    Karl Schwarzschild, formulated & founded the Schwarzschild Metric for Non-Rotating & uncharged Black holes in Einstein Field equations, Later the concept of Naked Singularities were taken into thought But, John Archibald wheeler, said that Naked singularities would not exist for a Long Time.
    Singularities Have a Been a Mysterious & complicated Since Einstein until Now.

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    Chapter:-
    00:00 - Starting
    00:05 - Channel intro
    01:09 - Introduction to the Video
    01:24 - Brief Overview of the Main Topic
    01:42 - Real Starting to the Lecture
    01:51 - Abstract of Space-time Singularity
    01:56 - What is a Singularity?
    02:34 - How does this Singularity curves the Space-time?
    03:24 - Visualization of How Curvature of Space-time happen
    04:04 - Why these Singularities are located in Black holes?
    04:31 - First Theory:- Collapse of a Star(Gravitational Collapse) Full Explanation
    08:13 - Deep Visualization of Gravitational Collapse(Imaginary Diagram)
    10:07 - Chandrashekhar Limit
    10:32 - Schwarzschild Metric
    11:05 - Formation of a Black Hole takes place
    11:30 - Life Cycle of a Black holes
    12:23 - Penrose-Hawking Singularity Theorems
    12:42 - Space-Time Singularities(Main Part)
    12:54 - Space-time Singularity Main diagram
    14:39 - How do we know Ergosphere is a Safe Zone in Black holes(in Main Diagram)?
    15:17 - Continuing the same Diagram
    16:17 - Frame Dragging Imaginary visualization(Main Diagram)
    17:46 - Full Explanation is over
    18: 59 - Introducing Singular Space-times
    20:11 - Null Geodesics
    21:17 - Whole Lecture completed
    22:05 - Thank you for watching, like, Share, Subscribe
    22:25 - End screen(Subscribe, See both video & playlist)

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  • How telescopes find invisible black holes | Catalyst

    7:15

    How do scientists find black holes when they're completely invisible? Let's go black hole hunting. Subscribe to ABC Science YouTube ????

    This is an excerpt from the Australian documentary series, Catalyst: Black Hole Hunters, initially broadcast on 26 February 2019. The full program is available for Australians to watch at

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  • How deep does the ocean go?

    5:56

    Are your kids wondering: “How deep does the ocean go?” This question came from Bao, a 4th Grader from the US. Like, share and vote on next week's question here:

  • How Sci-fi Movies Depicted Black Holes Over The Years

    3:14

    Of all the profound and humbling celestial occurrences to be found in intergalactic space, black holes are particularly intriguing. In this video, we take a look at how Sci-fi movies depicted these enigmatic bodies; black holes, wormholes and singularities.

  • What is a Black Hole? | Black Holes Explained | Black Hole Facts | Vedantu Young Wonders

    10:37

    What is a Black Hole? | Black Holes Explained | Black Hole Facts | Black Hole Theory | What is inside a Black Hole | Black Hole Tragedy | How Black Holes are Formed | Black Hole in Space

    Watch our new session on 'What is a Black Hole'. Learn the complete details about Black Hole which is important for all students and for the general audience to know.. If you follow this live session you will definitely get good knowledge about Black Hole.

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    Thanks for watching this ‘What is a Black Hole’ session!!! Hope you have enjoyed and learned about black hole facts.















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