What’s inside a black hole? - BBC World Service

Albert Einstein refused to believe black holes could exist, even though his own theory showed they did.

Today, their existence has been proved but they remain one of the greatest mysteries in theoretical physics. BBC World Service explains what we know (and what we don’t know) about this fascinating phenomenon.

00:00 Introduction
00:32 Albert Einstein's theory of relativity
01:43 Roger Penrose's new findings challenges Einstein's work
02:02 Why black hole mysteries are yet to be solved
02:47 Why a supernova is key to solving the mystery
03:34 Supermassive black holes
04:24 How the masses of the Earth & Moon distort space-time
05:07 The event horizon

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[Uncontested]

"not even light can escape it".

Literally every Black Hole video has that line.

[stephenmorris]

I was told once some scientists suggest we understand about 4% of the universe. However that must be an exaggeration, because no one knows what they don’t know so how could anyone know the percentage of something unknown.

[BrilliantCrow]

What's inside a black hole? A singularity. Oh thank you.

[cosmicnomad]

I thought something new was coming.. Instead explained the 100 year ago theory!! Thank you!

[slitrup]

IMO, Big bangs are on the other side of the black holes. In other words black holes are the origins of big bangs and vice-versa, like the dance of the waves eternally.
New big bangs are offsprings of previous big bangs.

[anapaulasmoraes]

Thanks for making so simple to understand this complex subject. I finally got it.!!!

[ShivMathur]

Please tell what’s inside the human mind first before going outside the planet 🌎

[joeharry]

Fun fact, there is also a black hole in Uranus.. occasionally it ejects explosive organic waste =)

[sidrafatima]

Great explanation, and phenomenal animations. Please create more of such educational videos.

[tamimmusafer]

There is consensus that supermassive black holes exist in the centres of most galaxies. The presence of a black hole can be inferred through its interaction with other matter and with electromagnetic radiation such as visible light.

[isatousarr]

This question challenges our understanding of physics and the very fabric of the universe. Inside a black hole, it is believed that matter is crushed into a singularity a point of infinite density where the known laws of physics break down. At this point, both time and space cease to function as we understand them, and the force of gravity becomes overwhelming. But is the singularity the final answer, or could there be something even more mysterious beyond the event horizon, the point of no return for anything that crosses it? Some theories, like quantum gravity, suggest that the singularity might not be a simple point of infinite density, but instead, a more complex and unknown structure. Others speculate that black holes could be gateways to other dimensions or even parallel universes. The truth remains one of the greatest cosmic enigmas, and solving it might fundamentally change our understanding of the universe. What do you think could be hidden inside a black hole?

[CraftRituals]

Its beautiful yet mind-boggling to know that our knowledge of the universe has a limit.

[MrGordo]

Thanks for this. I enjoyed the animation. How is was so stripped back but still extremely expressive was superbly done.🙌

[sandilranadeera]

Wonderful video. Loved the animation too! ❤

[shortstudy]

At the centre of Black holes there wont be space for sure, may be some kind of particle/matter. and every particle/matter has some radius to it no matter how small thus keeping the Einstein equations alive not braking them. what do you guys think ?

[altamashkhateeb]

Quite simple & informational for a interested non-scientific person

[thetexan]

1965?
John Michell first theorized black holes according to Newtonian mechanics back in the 1700s. Karl Schwarzschild calculated the solutions and introduced the event horizon in the early 1900s.

[jamesfrearson]

Decent vid. What is an example of the usual or accepted laws of the universe not functioning in them then?

[samcerulean]

I think blackholes are absolutely fundamental to understanding time. In science fiction they've been shown as creating wormholes which connect points across different spatial dimensions.. but I think that some black holes create a bridge through time which could be traversed back and forth by a highly advanced civilisation

[tomrichardsonstudio]

Kudos to the motion designers on this one!