Astrophysicist Janna Levin explains Black holes #astrophysics

[TransformityX]

What an incredibly smart lady. Pleasure listening to her talk about this fascinating stuff!!

[jasiekzar]

Wow, never thought of the black hole that way, that it’s an archeological remnant. That’s really a nice way to put it!

[ronalda.geobey]

Dr. Becky Smethurst states the opposite in her book on black holes. It's not a hole, it's not nothing. It's infintely dense matter, if I understand correctly.

[dakotaseckman]

She is literally just saying the black area of a black hole is actually an empty void around the dense matter in the center. Basically its like a super magnet that you can actually see the edge of area of the magnetic field, but not the magnet itself. However since we cannot see the magnet, scientists cannot 100% say the magnet is even still there since there is a lack of visible proof of the magnet or even the matter it pulls in.

[ktn]

I like how she completely expresses her conjecture as if it’s fact, and then proceeds to admit we don’t know what’s inside anyways lol.

[Antarian]

That is not what every scientist has ever said. The incredible gravitational pull exerted by the black hole is because there is the densest matter there, so dense and heavy that it creates a pull so strong that not even light can leave. The matter will disappear, yes, but it will take millions of years and when it does, so does the black hole!

[jdotoz]

"It really is nothing."
"Maybe the matter is still there."

Oops

[peterroth]

Ive heard hundreds of explanations of black holes and for me i like how she explained this.

[albertosimal]

If "Maybe it's still at the centre" AND "We don't know", why does she categorically insists that "There's nothing there"??

[naught]

Black holes have no centre, new leading theories say that its all just swirling and the matter at the centre will interchange with the matter on the surface

[psammaudirecords]

lmao the first shot of the interviewer she looks stoned :0

[JONNYQUESTaka]

Just for those who didn't understand.
When she says gravitational force, she's referring to gravity and now everything falls down. Buildings crumbling to the ground; everything pulling to the Center of the Earth from all around the world. Everything as we know it would get sucked to the center of our planet with such Force that could only be assumed as infinite gravity point hence a black hole. I totally hope that we could send AI one day.

[lassoatrain]

The property of light states it travels at 186, 000 miles per second. If light becomes trapped in a field then it is not that it can't escape but rather that it cannot exist if it cannot travel at the required velocity.

[FrankJohnson-dv]

I love her very unique explanation "there's gravity but there is no stuff there..." 😅👍
"...even after the matter goes. We dont know WHERE it goes..."👏
Think i like here better than Neil...🥰

[jeffcampbell]

Strength of Gravity is directly proportional to the mass of an object. So in my opinion there is something there. What is there is so incredibly dense light cannot escape it. Without light bouncing off of it, the object will appear black. That's how our eyes work. I truly believe that there is something there.

[artdonovandesign]

Dr. Levin's ability to clearly and fully detail the "indescribable" is remarkable.
Catch her on the PBS, 'NOVA' episode entitled, "Inside Einstein's Mind".
In this episode, she illustrates aspects of Einsteins' Theory of General Relativity in such a way as it can be understood by anyone. She condenses the complicated aspects of G.R. into simple and memorable statements. Here, her words for the Black Holes' infinitely curved spacetime as an" "archeological remnant" is brilliant (Her co-presenters also feature Sean Carroll and Simon Schaffer.) In NOVA, Dr. Levin describes Einstein's equation for General Relativity as a "tiny, inch -long equation whereby you can understand the nature of our entire universe on it's largest scales and _that_ is a _beautiful_ thing". That's memorable! It gives you an idea of how cool and exciting she can present science and astronomy.

Dr. Levin's BOOK on Black Holes is a deep and fascinating dive into the nature of these "Gravitationally Completely Collapsed Objects". It answers anything you ever want to know about Black Holes to the limits of our scientific knowledge.

[mexicanfoodjunkie]

Someone once called it a hole punched into the universe and I can't stop thinking about that

[DavidKolbSantosh]

There is a dimensionless point of infinite density at the center of a Black Hole, called a singularity, according to the math of General Relativity.

[-Clueless-]

It’s not nothing, it’s literally everything all at once.

[ceoOO]

black holes are very paradoxical objects...if we are gonna make observations within them, it can't be with light or EM radiation...