At the limits of astrophysics – with Katy Clough

Brilliant. I usually give up on these types of videos well before the end because I simply can't follow them. I am fascinated by cosmology but totally out of my depth with physics and mathematics. (yes, I am a humanities graduate for my sins). This however was totally understandable, partly due to the brilliant teaching style and personality of Katie Clough, and indeed the whole approach of other lectures in this RI series.

An awesome and emotionally presentation of my favourite Universe space-time entities,, the mighty"Black Holes".
Thanks to you Dr Katy Clough and The Royal Institute..

A kilometer is something like two-thirds of a mile.

I love how nonchalantly she talks about time space - like, we can fold it, no problem, it's punching through that is difficult

Brilliant presentation! ❤🎉😊

This research is so up my alley!! WOW I love your lecture also :) I was born in Reading England currently in the states.

Why does matter, mass curve space-time?

glad im not a british "tax payer" very nice talk but F.. taxs and the uk.

Racism, tine to turn off, plus too many, er’s and you knows.

If gravity isn't a force then jump off a 10m building and we can discuss it further. by the way refute my page 2 and I believe everything you want.

Loved it!! Thank you 😊

How does mass bend Space-Time? Does Space-Time exist if there is no Mass/Energy?

Just tell the kids: No, you can't go into a black hole because black holes bend spacetime so much that, it is always past your bedtime.
And you can't cross the bedtime horizon till your old enough

You may not have to send a signal to the front of the bubble - if you are generating the centre of the bubble from your ship - surly the signal just has to end the generation of it - but be careful it doesn't collapse like in the simulation

Negative energy is not exotic matter exotic matter is actual stuff that is not near us

How state the bleeding obvious 50 times to eek out a living!! Just saying what so many others have already said a hundred times, nothing new to see or hear here!

What if our galaxy was in the arm of a bigger galaxy? A bigger galaxy that's actually merging with another really big galacty? Just a thought question for a brilliant Professor like yourself. Great talk thank you.

Did Sam and llibert actually go to Africa and walk in a straight line they'll both end up in the same place....... Absolute lie!!!!!!! More hypothetical nonsense

Surely you’re joking Mr Feynman. I’m not joking - and stop calling me Shirley..

How can she say gravity is nt a force - apples don't bend spave-time at all. But she's also right - so no wonder students are confused. Limits of our language or confusion about context.

Because it is science fiction. Mainstream cosmology is wrong about distances, ages, mass, temperatures, star formation, galaxy formation, the big bang, matter creation, black holes, dark matter, dark energy, and by implication.. gravity. It's a question of COURAGE, intellectual honesty, and strength of character to face this, not intelligence.

she is a good lecturer, however, she wasted entire time by popular child level science fictions (mostly suitable for ignorant people) instead of real physics.

If you flew into a black hole would you exit it from a white hole into a other universe ?..

What a brilliant individual. You have my respect.

Lovely Lady ❤

These explanations are just off. I have heard other physicists explain questions and give answers and thus women's perspective is off. Asking what was before the start of the universe is not a good question? Wth? Asking what is the universe curved into is not the right question because we should ask if we can ho around the universe? Wth is she getting these opinions?

Intelligent, funny and happy, is she married?

If space expands more quickly above me than below me do I move downwards?

Space Curvature understanding on the basis of no force acting on the object - raises the question - why do photons move through space. What is the forcing them to move through space. Why they move with constant speed. Conservation of momentum is satisfied if they don't move at all as well. In PicoPhysics you get the answer to this question. The phenomenon (Space-Knergy interaction) that makes Photons move is common to observations leading to conclusions like space curvature, Potential Energy, exploding universe and propagation, reflection and refraction of light.

In PicoPhysics the observations leading to some conclusions like space curvature, Potential energy, exploding universe and propagation, reflection and refraction of light are all related to understanding of space. There is a mis-conception about what space is. In PicoPhysics space is the identity that is not Konserved. Konservation is Conservation sans neutralization. Though this characteristic of space can be mathematically/logically established, to make it easier to understand, it is incorporated as Unary law "Space Contains Knergy". With this as fundamental law of nature, we don't need such weird concepts as curvature of space as if space is some rigid curvy identity. Note: No. of spatial dimensions is derived characteristic of space (Non Konserved) in PicoPhysics.

As the lecture points out the universe moves in an expanding direction. There is no point of reference from the outside only from the visible inside with the red shifting bodies. My theory is our universe has reached its tipping point of not reversing but bending back to its origin like a boomerang returning to the thrower in several dimensions. Heading destruction while our twin counter balance universe awaits creation.

Our boundary knowledge is very limited. We are a young intellect in the scheme of things. Physics - has it really moved on.

If you believe in a 4 dimensional space time you need to think again. It's actually just two dimensions: distance as the length between two points in space and the time it takes for that movement between the two points in spacetime. The first three dimensions are just a made up coordinate system in space.

Wow what a beautiful mind she has...i love it

So far so good, she is not parroting stuff we have known for a century and heard 100 times. Just whip thru it and move on.
👍

Is this educational content for kids? That's even lower level than pop-sci tv docs.

Where does the space curve into?

There’s limits on space and TIME??!!
Blimey.

Perfect Blend of Professional & Practical.

Simple yet powerful Explanation why Gravity is not a Force even for adult , and Time is effectively warped in Space Time Curvature.
The answer remains the same. Time must answer

dissing phd students, i like her....

This universe is a sim. The proof that this universe is a sim already exists.

"The laws of physics"... just another way of saying what's in the underlying programming code of this particular sim universe.

In general relativity, gravity is not a force between masses. Instead, gravity is an effect of the warping of space-time in the presence of mass. So space-time is curved by mass and not by time.

The universe's expansion is the increase in distance between any two given gravitationally unbound parts of the observable universe with time. It is an intrinsic expansion whereby the scale of space itself changes. The universe does not expand “into” anything and does not require space to exist “outside” it.

The universe is not curving in the direction of time. When cosmologists say that the universe is flat they are referring to space—the nowverse and its parallel siblings of time past. Spacetime is not flat. It can’t be: Einstein’s general theory of relativity says that matter and energy curve spacetime, and there are enough matter and energy lying around to provide for curvature. The universe is expanding not curving!

Although it’s a month ago for me to see ie a time difference ! From my understanding of the talk, I can only understand that the word space should be killed and realise that we live in time. Time curves, galaxies exist in time.
Please, why do we need space ? Period.

What does it mean? : the universe is mostly curved in time direction

The electron has mass but no size, so how is it not a black hole?

Wouldn’t it be time creating the impression of 4 dimensions? Space curved as a result of time, not part of spacetime?

I thought the jokes about PhD students were not appropriate. Einstein’s general theory of relativity describes the deformation of the geometry of space but it does not describe the mechanism. What bends space? Quantum mechanics and string theory suggest there maybe a graviton particle involved and presumably an associated field so we maybe back to a force? The metal ball rolling around on a rubber sheet is a nice analogy and you could argue that the tension in the rubber is analogy to a deformation in some sort of field that is responsible for gravitational attraction.

Also I though more care was needed talking about black holes. We know that black holes have entropy and hence a temperature related to their surface area. We know they evaporate according to Hawking. Do black holes really destroy information, or is that information retained in a holographic fashion on the event horizon? That’s I believe what Leonard Susskind and others think allowing for conservation of information.

I don’t get the usefulness of “curved time”, it seems simpler to use the current idea that there is a scale factor a(t) which describes the expansion of space over time. You can blow up a balloon with some points or a grid on it and show they all move apart. We don’t know if the universe will continue to expand or collapse back on itself but at present it seems more likely to keep expanding and at a faster rate.
Bottom line, I think the presenter may have tried to dumb things down too much to the point where it might be misleading. I am not an expert here please correct me if I am wrong!

Novæ not novi
Astrophysics isn't Astronomy, obviously