Quasars: the Brightest Black Holes - Professor Carolin Crawford 

I am always amazed that someone could watch this and dislike it. Phenomenal lecture that I will watch many more times. Quasars are creeping into my favorite celestial object, which is currently occupied by GRBs.

"This professor cannot produce lectures anything less than fabulous. I have never seen, in one hour, this amount of detail on a subject, while still keeping the meaning of it clear." - Lovely new comment on RU-vid this morning. #quasars #astronomy

This professor cannot produce lectures anything less than fabulous. I have never seen, in one hour, this amount of detail on a subject, while still keeping the meaning of it clear.

I could listen to this woman talk all day, fascinating!

She is one of the best lecturers I have ever seen, and I watch a lot of lectures. Almost poetic and so informative.

Brava to Prof. Crawford. If Sir Thomas Gresham's bequest has done nothing else, it has encouraged many generations of scholars in various disciplines to learn how to lecture on their areas of expertise in ways that "just plain folks" can comprehend. She did it beautifully here.

This is so mind boggling. My 16 year old son loves science. Won a telescope in a contest when he was 12. He is an honor roll student who just received an A plus in biology. I am understanding more and more why these subject are attracting his attention. Perhaps he may one day be a scientist working with and learning from this professor.

After watching documentaries on the sun & starts, I come away with a vague knowledge of the information. It is quite the opposite here. In this case, we have a true expert in the field describing the content herself -- no journalists filtering the information. Spectral emissions, doppler effect, thermal effects, all described very clearly. Excellent job.

This lecture was an absolute joy to watch. I am not a student at your University, but I have a passion for Astronomy and Astrophysics, and this Professor has given nothing short of the finest lecture I have ever seen or heard on Quasars. She is incredibly insightful and filled her lecture with so much detail, but the clarity of every key point she touched on sang through like a bell. I was spellbound. Bravo, Professor Crawford! Bravo!!!

Carolin Crawford is superb. I understood every word she said. I was on the edge of my seat, eagerly lapping it all up. I just wish she had spend a bit more time explaining what happens to the rest mass energy when something falls into a black hole. She explains it all like an adventure story. Also she pronounces so clearly. no ums, no "I means". Every word is clear and to the point. She is the sort you would like to be marooned on a desert island with.

I keep returning back to Carolin's lectures. Enjoy every moment. Pitty that she stopped giving the lectures.

Excellent lecture. Clear, well described and great delivery. Thanks for posting

Carolin is literally the best lecturer; she seems so interested in her field!

Highly excellent lecture for both amateurs n fully formed nerdburgers alike.. Well done to all involved, especially this professor! Edit: Really is one of the best science lectures ive ever heard/seen.. And on QUASARS of all things.. Heavenly..

Definitely the most comprehensive video on quasars i have ever seen. I like how she takes the time to explain the processes used to come to the conclusions. Also she does a very good job of making it clear that these are ideas/theories not 100% conclusive information. I find a lot of science documentaries are brutal at this.

Awesome lecture. Ive watched several time to appreciate depth of informations and interesting theories.

41:52 - That is the best hand gesturing to explain a very complicated idea.

New favorite lecturer! Prof Crawford is outstanding!

I love it when she talks about 'really tiny regions, 2 or 3 times the size of our solar system' lol.

Stupendous lecture. She is great!

Great lecture. Informative and well explained. I like this professor she makes the topics very understandable!

Just loved this lecture, very clear explanations and so forth: fabulous.

It is absolutely astonishing that matter falling into a supermassive black hole produces energy so prodigiously and with an efficiency ten times that of the centre of the sun. Extraordinary.

Wonderful vizualitation of whats going on in quasars. Thank you for this!

Great stuff. The super massive black holes in the early universe are very intriguing.

Loved the talk, I love Blackholes and their relatives and the lady dont go on about numbers which for me is good. I really enjoyed this thank you.

Very informative! A great teacher, this one.

Amazing lecture. By far in my top ten.

Excellent talk!

A nice lecture about the whole about BH and Qs. Thank you so much

Very good presentation, understandable and pedagogical.

wonderful! thank you

Just a lay person interested in this sort of thing - excellent talk and very accessible - thank you!

Great presentation !

outstanding

That was very interesting and informative. I am doing an Open University course and this has helped me a lot! Thanks a lot!

Great lecture.

Ive watched a few of her lectures now but this one was a abracadabra for me lol

Hawking radiation at the event horizon, magic stuff Carolin, keep these videos coming... please.

Superb lecture

She is very good!

very good lecture

that was amazing

50 seconds in, mind already blown...

Nice information

Yayayayay! Love the lectures!... Oh and... First! :-)

"An American Astronomer originally made this discovery," is a common phrase amongst lecturers around the world. Even though, for millennia, discoveries were made by people from all nations and cultures. It's true that, in the field of Astronomy, since the 100" Hale telescope was built on the top of Mt. Wilson in southern California, our collective understanding of the universe has experienced the most profound growth and evolution, before that, astronomical discoveries used to come from a more diverse cross-section of humanity. More than 90% of the stars we can see with the unaided eye were named by middle-eastern people, (it's also where the, "Al," in, "Algebra," and, "Alphabet," comes from.) But, besides that, it was European astronomers and scientists who first wrote down the laws of gravity, motion, thermo and hydro-dgynamics, the electromagnetic spectrum, ballistics, chemistry, and the atomic phenomena. Since the beginning of the 20th. century, most of the scientific discoveries in astronomy and astrophysics have been made either in America, or by Americans. But, that doesn't mean the rest of the people in the world haven't made their own fair share. And, the more human beings continue to share information openly with each other, the more shared our voyage of discovery will remain.

@43 what happend to the quazars that diminished by the current age, there were many during the first quarter age of the universe but now we dont see them because they moved further away as a result of expansion of the universe? or the life of quazar ended? if quazars died, then how and why?

Hot topic!

Impressive

Good day Professor Crawford and to everyone. Professor I would like to know more about planemos, would it be possible to arrange a lecture on that topic?

Outstanding presentation with a great example of elevated use of the "Kings English". Great historical summary of the progressive discovery of the Quasar also.

How much long (light years) are jets of quasars

I love your presentations... The field dynamics of a black hole/singularity are primordial. It enfolds a permittivity, captures and processes up to a permeability violating exclusion triggering emission. The interactions with it are degenerate and played out over BILLIONS of years. Quasars are big bangs. Lemaitre's hypothesis fits the universe of ONE galaxy as was established in 1927. Just follow the facts. Use the proper distance function complete with the omega modifiers. Light doesn't lie. Humans trying to prove their hypotheses do. As a singularity enfolds order (time dilates in), by the second law of thermodynamics and conservation there must be proportional unfolding disorder (wavelength/space expands away). Use Maxwell's equation and you can see the range of the spectrum goes just past numeric h^-2/3 seconds (417 trillion years). This is the distance in isolation between a singularity and its disorder horizon. Combine all of these "bubbles" and you get the cosmological constant and omega modifiers shrinking that to 46.85 Gly. The cosmological constant is vital for showing the rotation of axes between angular and linear momentum. It is why Newton's constant can't be nailed to one specific value except in extreme cases like degenerate pressure and black holes. These bubbles define the fundamental fabric of spacetime. It exponentially grows as you move away from the light source for an obvious reason: Maxwell's wave-frequency equation. If you need more proof, adapt momentum in Heisenberg's uncertainty for frequency/wavelength. What it shows is spatial expansion converts into temporal contraction creating an illusion of an expanding universe. It also shows you can't know your exact relative position and the energy at the same time. It's a QM problem. For all the math and arguments see www.amazon.com/dp/B07BZYYTF1 or facebook.com/QuantumRelativity.PT/.

nice

ty

what if E=ΩC^V? im worried that bosons coud be magnetar particles.

Before you create radiation you need to heat the accreditation disc. What starts that heating and forming plasma? The falling matter will be compacted and heated. The slowing of speed will transfer kinetic energy into heat energy also. It is Nature’s collider but then at the poles we should observe Quarks and Gluons besides other ejected photons, etc.

do quasars emit Hawking radiation ? wouldn't that settle argument ?

my husband would give his right arm just to talk to her for one hour about his ideals

Black holes are very different than stars? Black holes are much colder than stars, so that objects from space don’t get burned, as with stars. Objects from space can be “consumed,” so black holes can become more heavy. And it can happen that temperature-differences are so great, that a black hole can (partially) evaporate. Or not?

I love how clearly posh Brits speak lol. Feynman's old lectures are almost inaudible sometimes.

I want to look through one of their telescopes

You cannot look at this stuff and not realize that there are no black holes at the center of galaxies. There are no black holes. Just a little bit of research into Halton Arp and you will realize that he was right about galaxies and quasars. The red shift is because the quasars are extremely young and that they are not redshifted by any doppler effect. And the center of galaxies are sending matter out of their polar jets, creating new galaxies and quasars.

Question: if we are not the center of the universe - why is everything red shifted going ever out or away from us & not some blue shifted coming towards us or ever inward & why is the background radiation not a single hue of red yet a spectrum of reds?

wow u make astrophysics sound like a Wordsworth

33:03 10% efficiency.

If you could travel back in time a billion years, what would our night sky look like as the Milky Way black hole was feeding?

i miss the sony vaio they built quality computers although vaio is once again in japan only its no longer owned by sony

Quasars. Cheese flavoured corn snack.

Fora.TV is starting to annoy me ... glad some of the videos there are mirrored on RU-vid ...

If,as Prof.Crawford states that mass of the black hole is only 0.3% of the total mass of the entire galaxy how can it exert so much force? I imagined that it must be much greater as 0.3% just does not seem like it could be correct there is simply too much matter at distances which would surely fall outside of the gravitational pull of the black hole. If anybody can put me right on this kindly do so without blinding me with science!

26:05 action bar of a fire mage

Couldn't some of these theoretical objects be the making of a 'galactic dynamo'? The old Princeton praetorian once scoffed at the actions of electromagnetism at such scales but looks like they were wrong on that one? It's a shame many astronomers have been discouraged presenting evidence that conflicts with the sacred text of GR/Big Bang cosmology. Just ask someone like Chip Arp...

how can light reach us that is billions of years old if the universe is only 6000 years old?

I guess all blackholes look like the bright lightballs because of massive curved lights from all surrouding direction.

I have bellied up to the trough of knowledge and slurrped.

Bc,Ad,Ph!!!!!!

Whoa , that was a nice lecture . And now for something not completely different : colliding galaxies , also by Ms Crawford it would seem : -> 7jPN-uFFTnc Quite a violent place , our universe . Glad i'm not a flatlander . Their fairy tales wouldn't thrill me 0.3% of how much Science touches me . Hey , heard that number in this lecture . . . So basically Science is a Galaxy and faith a Black Hole . Ah !

Can anyone tell me how they arrive at the conclusion that the universe is expanding every more rapidly because of red shift rather than concluding that the universe was expanding more rapidly in the past and slowing as it ages?

Next clear night we get, I'm going to whip out my 6". I'm sorry it's not more Professor Carolin Crawford, but rest assured, I will be thinking of you when I do it!

It's funny that someone as clearly intelligent as her keeps mixing up the concepts of eclipse and occultation. For instance when the moon blocks the Sun that isn't an eclipse that's an occultation and she used the term correctly when she was referring to the Moon blocking the Quasar but then she used the term Eclipse right afterwards which is an incorrect use of the term. the thing that's eclipsed in that instance is the Earth since that is where the shadow falls. Same thing with a so-called solar 'eclipse'. In that instance the thing that's being eclipse is the earth since again that is where the shadow Falls. Funny thing though during a lunar eclipse since the shadow of the earth falls onto the moon the use of the term is correct.

"Everything is formed by a locational 4pi spherical inward absorption t=0 and outward emission of electromagnetic waves." Light waves from all time dilating inertial ref-frames (within every observable spherical region of the infinite universe) cascading downward from a distance radius combine forming the sinusoidal wave medium density (space) compressing and de-compressing two opposing vortices at each and every point of space, or contracting and expanding virtual pair's popping out of existence.. . . The total amplitude formed by a rings series of inward spherical waves coming into every point. . ..Colliding at maximum compression points at wave crests and wave troughs always seeks a minimum. . ..Are equally balanced by opposite expansion at interchanging compression points. . ..As trillions of waves cancel the sum of opposite vectors mathematically is always zero.. . .Leaving space with an average temperature, or pressure stillness of the wave amplitude squared.. . . This polarized superposition of the wave amplitude squared is the reason for entanglement for the symmetry or conservation laws in physics or why, at the speed of C, time and space are zero due to length contraction and time dilation or why, the point of charge Q is the same for the entire surface of an expanding light sphere.. . .Because the polarization between the crests and troughs will remain the same sharing the same expanding moment of time no matter how large it becomes until acted upon by an external force.. . . These vibrating sinusoidal spherical wavefronts always transverses one unit of space/ per one unit of time. . ..Huygens wavelets forming the wavefronts are a bit like drops of water into a pond dividing one unit of space/ multiplied by one unit of time. . ..Or like the zeros and ones of a computer screen the Planck constant is continuously forming a blank canvas in a sense they are vibrations on the edge between space and time.. . .Light is simply space divided by time and nothing else.. . .That implies a strict equivalence between time and space with light as a constant conversion unit between the two.. . . And because everything is formed by a locational 4pi spherical inward absorption t=0 and outward emission of electromagnetic waves. . ..The Lorentz contraction time and space is infinite in our universe within the active cores of galaxies!! Implosive energy compression contracting time and space where the virtual pair's formed by 4pi R2's cannot escape from being multiplied to infinity t=0. . ..Forming an equal and opposite explosive de-compression of Comic ray jets and Synchrotron radiation expanding outward via the poles.. . . A sort of fusion of wave and emission of new Cosmic rays.. . .Cosmic rays are 89% hydrogen nuclei, 10% helium nuclei, and 1% everything else!! Atomic particles are really high wave amplitude wave centres of pure vibration, from regions of intense wave pressure, made of vibrating wavefronts called shells in particle physics, or spherical standing wave structures over a period of time.. . . And thereafter on another fractal level.. . .Stimulated emission is a process by the way of which a higher energy quantum mechanical state of an atomic particle absorbing energy t=0 now is being converted to a lower level resulting in the production of light photon oscillations, or new electromagnetic vibrations.. . . A sort of fusion of wave and emission of quantized spherical wavefronts of electromagnetic radiation independent of the motion of its source.. . . The electromagnetic spectrum is a continuous flow of energy therefore light is a wave and its was time that was quantized.. . .Spacetime was quantized into moments.. . .Only the frequency now is relative at each dipole moment of time.. . . It is a locational 4pi spherical inward absorption t=0 and outward emission of electromagnetic waves that's forming resonance antimatter matter annihilation, forming positive and negative electric charge, and electromagnetic interference fields as time unfolds C2.. . . The fact that this tiny spherical region of the infinite universe has a limited observable range as the waves come from a distance radius, is observed in the shape of an inverse sphere. . ..4pi R2.. . . And the fact that the electron is a perfectly round vibrating sphere.. . .Are two sides of the same + and - coin!! There exists only two combinations of these two spherical + and - electromagnetic sine waves, or wavefronts multiplying and dividing at right angels.. . .They have opposite vectors and quantum spin forming the positron and electron wave centre.. . .4pi R2=/N pi Re2.. . .Or "the two energy states of Qubits" in quantum computing which can be such things as photons, trapped ions, atoms, electrons, and nuclear spins.. . .Only difference is their rate of vibration or time dilating volume.. . .Their output was the negation of their input: 0 goes to 1,1 to 0.. . .the start of a Fibonacci spiral.. . . Therefore generation of any information exceeds radiation during the first half of the cycle. . ..Radiation now exceeds generation during the second half of the cycle.. . .As the constant outward momentum of EMR repels like charged particles absorbing energy t=0 and emitting the density from the two previous mc2/c4 vectors spiralling out the Fibonacci sequence seen everywhere in nature.. . .from spirals of elements, to DNA, and billions of microfilaments spiralling out from the zero point field now within each neuron of the brain into microtubule structures!! And the human brain consists of approximately one hundred billion neurons.. . .(Mans mind mirrors a Universe that mirrors mans Mind) E2=mc2/c4+p2/c2.. . . Each neuron has a voltage which changes when ions flow inward and outward from a cell.. . . Once a neurons voltage reaches a certain level of subconscious energy compression t=0, it will then consciously fire (C) a new electrical signal to other cells, which will then repeat the process.. . . Therefore we all have free will.. . .And depending which neurons gets stimulated through repetition, certain neural connections may become stronger and more efficient, whilst others may become weaker as time unfolds statistical entropy.. . .This is called Neuroplasticity.. . . Spherical logarithms forming and breaking exponential spirals.. . .From virtual pair's of plasma, to gases, liquids, and solid Fibonacci fractals.. . .Only difference is time dilating volume, or their rate of vibration at the centre of their own 3D ref-frames within the One Infinite Universe.. . .and therein lies the secret of the universal pulse beat.. . . And because in 3D space-time centre is everywhere forming the total amplitude of sinusoidal wave at each and every point of space now mc2 represents the opposite expansion of mass which is a de-compression formed by the energy compression c4+ acting upon time dilating inertial ref-frames p2 at the expense of gravitational potential c2 as time unfolds.. . . All motion is 2pi spiral.. . .And all direction is 4pi spherically curved.. . . Vibrating sinusoidal spherical wavefronts of only motion forms Einstein's curvature of spacetime.. . . Space is a division of solidity into entropy C2 the second law of thermodynamics.. . .But also E2= a multiplication of volume at the expense of gravitational potential.. . . Gravitational systems -1 are the ashes from prior electrical systems +1. Time is inverse multiplying +4-0-4+- dividing like frequency and wavelength.. . . The constant outward momentum of the light C2 forms the inward force called gravity as time unfolds the continuous stimulated emissions.. . . Time is shorter at one's feet than at their head because of the geometry basically the greater the energy compression contracting spacetime=0 now the shorter the expanding wavelengths forming an inward acceleration or gravitation as time unfolds.. . .The amount of radiation compressing the wave amplitude reaching 1 meter then it will be one-fourth as much at 2 meters, hence one-fourth the intensity.. . .Thus objects just free fall towards the greatest energy compression or shortest rate that time flows.. . .As the surface of the light sphere increases with the square of the radius the strength of the gravitational field is inversely proportional to the square of the distance from its source.. . . Concentrated spheres at right angels such as electrons, onions, the Earth and Sun, are surrounded by now slice layers of light of equal pressures.. . .Clouds float around the Earth in them.. . .The reason they float in curves parallel to the Earth is because of these equipotential planes of pressures which curve as the Earth curves.. . . Spherically curved planes of pressures act as lenses to multiply and divide light radially.. . . Because everything is contracting and expanding, from a locational 4pi spherical inward absorption t=0 and outward emission of electromagnetic waves.. . . And as that constant outward division like that now from the Sun forms the inward force called gravity as time unfolds C2 takes about eight minutes to reach Earth.. . .And as all their individual light spheres superimpose from all the time dilating matter, and the stars their light spheres superimpose as crests and troughs become in phase now, their space time line symmetries will synchronize, or amplify by compressing the wave amplitude +4-0-4+- now the shorter the expanding wavelengths dividing acceleration or gravitation away from its source in unison.. . . Therefore relative to the perspective of an outside observer, at the centre of their own time line of broken symmetry, there is no dark matter."

Gravity travelling the speed of light. Causing catastrophic partical refraction.

Check out Primer fields ; by David Lapoint on youtube. The universe is electric and magnetic.

Praise is all very well but a little criticism is required to provide a rational balance. The comment that the center of the Quasar is a black hole is a rather rash statement . For this to be true then the tremendous light source must be outside, by a fairly large margin, of the event horizon and this light source then requires some sort of explanation or at the very least a working theory. MoK

With all due respect Quasars are proto-galaxies spat from the core of Seyfert galaxies this has been observed by Halton Arp who not only had his paper rejected but with extreme malice, who ever loses tenure over a paper,? Arp that's who, they took away his telescope time, they are not at the edges of the universe but connected through filament to their parent galaxy, perhaps she should go back to school and learn plasma physics, just saying.

mr eddinton said dont feed your black hole after midnivght

obviously, BLACK holes don't exist and astronomers still don't know what quasars are.

As my calculations say, the Quasars create dark matter until the galaxy they help to create stabilized and that stops the AGN, soon I will show my calculations.

black holes lol aren't they related to unicorns and pixie farts? mathemagicians. if the magic/math don't work just make something up.

so we still talking black holes none sense.

I'd let her talk me sleep every night

If you have magnetic lines, then basic physics tells us, there must be a electrical current! The gas she mentions is not neutral gas but it is called plasma. And what is this plasma? Answer: it is an ionized gas consisting of positive ions and free electrons , plasma can exists in two environments, at low pressures or at very high temperatures. Another fact, plasma constitutes Over 90% of matter in the universe. Can plasma conduct electrical current? Answer: yes, due to its ionized (electrical Charge) nature. Interesting that she doesn’t mention these facts! Can the Jets she is describing be Defined as currents ? The answer is, yes but why is it that she doesn’t mention this possibility?

Ami-Märchen! Erzählt von einer englischen Lady! :D :D :D

brightest black hole....... stephen crothers would destroy this woman in an intellectual battle!

like david lee roth.. im hot for teacher lol

Finn Suomi Bitch😣

Oh so now we can see black holes??? What a bunch of crap.