Why people are having an itch in their minds complaining about a subject matter which is already complicated to explain yet this documentary chose a presentation, which is easy on the eyes and pleasing to engage my mind to enjoy it along the way. I admire PBS they have a unique way of presenting documentaries and on UKposts at least allowing free access for anyone to enjoy. So with all due respect why complaining and comparing!! A fan and an admirer from Pakistan.

I am speechless...what an enormous effort to produce a documentary of such splendor. How you can keep this degree of excellence going for such a long time, is utterly mind blowing. There are no words that can show my appreciation...thank you ALL.

I can't get enough of this kind of wisdom. Called science. You know that strange thing creating, cars, cell phones and moon rockets.

Best documentar about the universe. So well explained. - Superb.

I swear I wish I had these docos when I was young back in the 80’s. I would haves been glued to the crt screen. And with what I learned I could have been a space scientist’s assistants’s coffee boy/runner…. Instead of a bum barrista working at Starbucks….. I could have been contender 😂😂😂

Thanks for posting.

great presentation here. So informative. Thank you for keeping my interest so strong. Grateful to PBS

Brilliant documentary. Absolutely stunning. Thank you!

Absolutely amazing!!!

Damn! The universe is terrifyingly beautiful.

the video was excellent, see the information on these amazing wonder makes you get goosebump.

Loved it! Thanks a lot. Such great explanations from the ones involved in developing what they are explaining is very enriching.

Janna! Aren't you lovely and the documentary is brilliant also. You blew my mind with a subject made simple.

Great presentation, easy to digest.

so cool - thanks for educating me!

Such an amazing documentary!!

Love it!!

Good stuff. Always a fan of NOVA and this type of stuff is why. :)

I literally grew up on PBS and now i can't wait to show this to my future kids 🥰🥰🥰 if it entertains me i can only imagine a kid 😎

I love Science and Scientists ❤

41:02 I love that necklace! Awesome. ❤👍

😀sú to moje srdcovky nadšená som ich tajomstvom milujem PLUTO❤

PBS is very informative. The way they carry the show is amazing. Excellent Content. ⭐⭐⭐⭐⭐

Just...WOW, and THANKS

Loved it. Felt like taking a galactic tour through space.

NICE work. Also love you for being the namesake of my lifemate for 50 years,

Knowledge is a wonderful thing. While it's not our ultimate, it's what we have, to the best of our gained understanding. Yes it may change, it will change, but these are wonderful times. Just enjoy. " No beginning, no end" to me it sounds like eternity, which I'm a great fan of. Rightly or wrongly.

Great documentary thank you

Amazing thankiuu !

I’ve been enjoying this documentary the last few nights. Incredibly enjoyable and informative! Janna Levin is a fantastic host! Great job PBS!

It could be as simple as, a "black hole" is just the heaviest/dense's unknown matter in the cosmos rotating incredibly fast !

Great show

Loved ❤

I believe that someday we would unravel the mysteries of the Blackhole

The speed of quasars says something about the shape of our universe, intrinsically.

Love the way they present it... i just love it.. and really we all are not black holes experts here... true to God i felt it when the gravitational wave hit the LIGO.. xx❤️

Sending love and prayers from the UK 🇬🇧 God Bless you all. 👏💜👍🙏😎♿️ #ForeverPromotingPositiveDisabilityAwareness

I seemed to be able to keep up with this one much better. It was great. I usually get lost (In space, as it were).

Fantastic upload. Clear and articulate narration. Wonderful visuals. What an absolute treat. Cheers PBS. Hope you all have a lovely Christmas.🤶 🤶

Really a stomach full of material... I munched each minute of the video...very informative and interesting...❤keep it up

thanks

The whole problem with Newtonian physics and all that Einstein business is that everyone know that our planet is flat! Of course I'm joking, its a great show you guys made. It is complicated stuff, very well explained. Well done!

I don’t think people in here realize what a great topic this is

"A good comparison I heard from my science teacher way back when was that; somewhere out there is a grain of sand that has your name on it... go find it. Really put things in perspective…"

Excellent

Videos like this and programs like Nova are why it’s critical that PBS remains active and properly funded to ensure education and wonder are attainable for all ❤

Jana levin❤

Flot video. Det føles som om, at Kosmos er en stor levende organisme, præcis som vi mennesker.

Great representation of that seemingly strange topic 👽👽👽

Gravity is the greatest modern day deception of the ages

Love it; certainly beats boring big-worded docs so yeah power to you for dramatization and such makes it easier to understand and be more intrigued about a topic i have a hard time understanding the boring 😴 way

Great presentation!

It’s amazing how Astrophysicists figured out something like this theoretically….

Wonderful documentary! From the great mind that envisioned them, makes it a outstanding master piece of knowledge. Wish you can update it with the images of the black hole initiative! Thanks so much from Mexico!

This is not fluff. Janna is an enormous asset and contributor to science. She is a great communicator and makes very difficult science understandable to everyone. She is a treasure of humanity.

There is alot to this world. We are so small, but so big at the same time.

I have Rush Faewell to kings Cignus x-1 playing in the background while looking at this documentory, mgestic.

I've got a question for all, what came first energy or matter?

Thanx for putting this on u-tube finally

OMG its so powerful

FIrst time i love to watch science channel

actually the gravitational wave is created as a result of the orbit of the black holes itself not the collision.

I got experience surrounding items like cars, ball, table, spoon raise up by themself without gravity for about 10sec and later dropped to the ground

Did u try it

where it come from?

Hope I get an answer for this.. 14:54 does that mean earth is gonna fall for the curve of sun fabric space time liens some how !!!

Gravity is not a force it is a description of moving space toward matter. Gravity is the manipulation of space as it accelerates towards matter. Acceleration and gravity are identical as far as force is concerned. It's obvious that space is accelerating toward mass at a continuous rate. The matter that exists within this stream of space is pulled in the streams direction. The consumption of space is what allows matter to exist.

It’s bizzare, We discovered Blackhole now, but hindu mythology discribed it 5000 years ago, google what is the significance of shiv 🔱

You can imagine space as a matrix (ether) with the smallest regular building blocks that we cannot represent.

Nice sounds added... too bad space is silent!

What is the stuff the jets coming out of a black I hole

Why is the background music soooo loud?

so interstellar weather? the evolution of the expansion and contraption of spacetime within and between galaxies.

Which fuel does your spaceship use?

everything tend to get closer and closer to the object with the greater gravity....eating, eating, until even light cannot escape

Wisdom knows not, it is.

I'm amazed by how they calculate the distance to the black hole, that was my greatest wonder.

So basically intense gravitation tearing down space-time fabric creating a free fall into Abyss.!!.

Let's not forget that the word apocalypse means revelation, not destruction or neither the end of the world.

Can light travel without gravity?

Love the image Janna Levin travelled to the Black Hole till she got spaghettified ❤

So basically, since everything in the universe can be simplified to space and time, a black hole is a place where space is compressed more than the outside. That is what causes the difference.

Heard it all before

ok were is now and which way is it moving?????

Black hole IS the place where everything ends and where anything begins. The chauldron of the universe. Because It exits WE can comtine to live.

No, the light from the Hydrogen is undergoing relativistic stretching before it leaves the black hole volume. This accounts for the RED shift of the Photons at the source. If the source of the radiation is close to the event horizon but not yet inside it then it stands to reason it will be red shifted as it makes its laborious way out of the QUASAR. This would naturally give the appearance of a distance related red shifted light but the source is undergoing time dilation which is making the light red shifted as it labors to ascend the gravity well towards the observer. The immense energy needed to cause this emission is the likely result of a laser like shell of trapped light that collects around the core of the black hole because it is on a trajectory that neither enters, nor can escape from, the gravity well. Such photon concentrations would vaporize any matter entering the shell and some of those collision events would produce light from the atoms that would have a trajectory and energy and sufficient escape angle to emerge from the black hole over time. The chaotic spectrum observed is because the material entering the Quasar is itself chaotic, being made of materials contained in stars and planets in random quantities. A star's Iron core would produce different dominating spectra than the oceans of a planet lost in the chaos of the melee. I would expect to see the emission lines of all the elements in the food source for the Quasar, and some new ones from other as yet undiscovered elements, and possibly some from dark matter, which since it is responsible for the gravity well must be itself pulled into the black hole as well. Interesting food for thought. PTE.

I'm not a scientist, so I'm a bit lost. Are the enormous gas clouds entering or exiting the massive black holes?

Don't forget, nothing escape a black hole, (not even light)

What if all black holes ended up "eating" everything that nothing is left but all other black holes..then they merge into one big supreme blackhole, nothing else just that big blackhole, would all energy be a big bang after, so from that " nothing" comes rebirth of universe...haha 😂..ignore me im just babbling

Not engine of destruction, but the engine of creation!😂 No black hole, no galaxies.😮

Rotational kinetic energy of billions of star’s cores equals mv squared divided by two, half of what is necessary to hold up.

wow, this is how you make a video

this is a sensational overload of powerful adjectives and quick cuts between people who are seemingly important but who are all delivering absolutely no actual useful information. its more like an advertisment for space... radical, mega, daring, risky, remarkable, epic, monumental... sheesh chill out

Can we hitch a ride on gravitational waves?

Keep on smilin Janna, Keep on smilin! :-D and dont dissapear in a black hole cauz yre beautiful AND naughty

The Universe is expanding. AI from Edge, 67.4 kilometers per second per megaparsec (a distance equivalent to 3.26 million light-years). If some solar system isnow at a 50 liht years, how far was 10,000 years ago from the solar system?

If gravity is not interaction between objects, how it travels in space-time? It sounds like space-time is a medium with which objects interact instead with each other. It's a vicious circle. The explanation of the phenomena rises equally unexplained question.

I can’t be the only one to think a black hole will grow to a limit.. then explode? >> Big Bang

No black holes exists but crazy huge stars that have massive gravity

What happened to the original host of Nova?