I appreciate your effort in making everything you talk about interesting and easy to listen to. Never stop!
@GabeTStarman5 жыл бұрын
George Sanford what are you trying to say? Your response makes no sense.
@GabeTStarman5 жыл бұрын
Frank Olsen I think she explained it well. She talked about the limiting factors of black hole growth, and she showed that chart of the maximum growth in relationship with the black hole’s spin, so yes she did answer the question.
@GabeTStarman5 жыл бұрын
George Sanford Well, I don’t know what world you believe you live in, but it certainly sounds a lot more boring than reality. But in the end you’re probably just a troll. In fact, I think almost certainly, since no one would ever take you seriously. So in that case, well played kid.
@Agavegeoff25 жыл бұрын
Watch the video link I posted from the Electric universe .
@fundamentalsofknowledge69023 жыл бұрын
@George Sanford I am not sure I know what you mean by 'spinning ball'. If you mean 'Earth' by that, I do not even know what to say to you. If not, then please explain what you mean by that, as you don't really make much sense...
@Steve_V10665 жыл бұрын
Thank you so much for your hard work on these videos! You are wonderful at taking complex things and chunking it down to concepts that are understandable. If you ever offer an online course(beyond what amazing stuff you do here), please let me know and I'd sign up instantly.
@Steve_V10665 жыл бұрын
Also I pre-ordered the book!
@deslomator5 жыл бұрын
It takes skill to deliver an accessible explanation of so many concepts in one video, nice job.
@RT710.5 жыл бұрын
The production value of your vids just keep getting better and better! Really awesome nerdy technical stuff presented in such a fun and lighthearted way, thank you Dr.
@joostvisser85375 жыл бұрын
"My arch nemesis at the minute is grass" I laughed at that way too much xD
@MarcoLiedekerken5 жыл бұрын
2:27 "Depending on the accretion dixxs temperature" My chuckle moment of today :p
@TheRealFlenuan5 жыл бұрын
I was expecting this comment
@dawn-blade5 жыл бұрын
I was not expecting this comment
@ImadogGarcia4 жыл бұрын
Black hole: I will eat everything Physics: You can‘t Black hole: crying
@chrisswan9074 жыл бұрын
2 of my favorite things, You AND Jeniffer Lawrence , in one video. I love your enthusiasm and passion. And how you talk with your hands.
@gatecrasher03805 жыл бұрын
I could look at and listen to you all day. Informative video. The bloopers at the end was also funny. Looking forward to more.
@aarontyler95695 жыл бұрын
You do an excellent job at explaining such complex phenomena
@losttribe30015 жыл бұрын
9:55 “wwwwweeeeeeeeeeeee!!!!!!!!” That’s all I can offer on this video. I ain’t none too smartest. 😆😆
@MIck-M5 жыл бұрын
I can relate to that. When stuff goes over my head I like to use the Ralf Wiggam response, "My cat's breath smells like fish" hehe
@bernieponcik13515 жыл бұрын
Watch "Maxwell The Pig - GEICO Insurance" on KZfaq kzfaq.info/get/bejne/qd2cdpSKmbuUe3k.html
@losttribe30015 жыл бұрын
Mick M Ha! My wife and I usually go with Ralph’s “so...you like....stuff??”
@doedecaheedron5 жыл бұрын
A Lost One The answer to... What did the snail say when it got a ride on the turtles back
@pspicer7775 жыл бұрын
ALO, Funny... Thanks!
@pkastronomy5 жыл бұрын
Surely D_isco=2*R_isco
@DrBecky5 жыл бұрын
Love it 👏 if I could Knight you for that comment I would
@deepfriedsammich5 жыл бұрын
@@DrBecky "Listen. Strange women lying in ponds distributing swords is no basis for a system of government." -- Dennis
@asshatteryengaged8135 жыл бұрын
"King of the who?" "The Britons!" "Who're the Britons?
@HD-pe8lv5 жыл бұрын
Love the fact that they measured the R_isco in CM, LOL
@e11235813213455891445 жыл бұрын
and if you give it a pie it becomes L_isco
@djschultz19705 жыл бұрын
I appreciate your ability and attitude for science education! This is good youtube channel.
@STohme5 жыл бұрын
Very nice talk on a complex subject. Many thanks Rebecca.
@alandavis97655 жыл бұрын
Thanks Becky for an intelligent and fascinating insight into the properties of black holes, you are a breath of fresh air, we need more people like you to educate and share knowledge, keep up the good work.
@mycount645 жыл бұрын
Thanks Becky, learned something new today ... size limit of black holes and them winking out.
@brucemacdonald15095 жыл бұрын
Thanks for including 3C 273 -- my favourite object to show people at public viewing sessions
@ricksli15 жыл бұрын
Awsome,beauty,humor,and brain do mix very well. I like yours video, thank you
@rosellabill Жыл бұрын
That book was a Fantastic read. Anyone who enjoys Dr. Becky already knows this. Thanks for the video.
@kurtn48195 жыл бұрын
Thanks for the great video Dr.. One of your guests asked a question that most laypeople wonder (because we just don't know enough to not ask) and that is: "Tom Hathaway - Wouldn't a black hole with all the matter in the universe in it essentially be the same as it was before the big bang?" PLEASE address this because if you don't we'll go around spreading this rumor and it'll all be your fault. hugs & kisses
@ricardolopez53525 жыл бұрын
It was discovered in the 50's in mexico in tonazintla puebla radio telescope, and it was in the catalogue number 618, hence the name ton 618, but still they can't see it's host galaxy due to be so bright the hyper luminous quasar that it almost blocks the whole galaxy
@SpeakerWiggin495 жыл бұрын
That must be annoying for intelligent life trying to study electromagnetism in that galaxy, their radio waves are always being jammed!
@Jirayu.Kaewprateep3 жыл бұрын
I don't know BUT as it boardcasting then all of them OR nearby frequency distorted at the same slice of time?
@herblapp5 жыл бұрын
You put the dart in the bullseye once again! Love the introductions of comic spoofs from modern media. It really lightens the heavy material that seems to broaden the appeal to include more folk. I'm intreagued by your prep work and would luv to see your notes. Not only fo you not refer to them, you hardly take a breath for the entire video. That's your enthusiasm & excitement from how much you enjoy what you are doing! 😎
@jeffcantor32984 жыл бұрын
Another fascinating topic. I may not follow everything you discuss, but I still learn something new every time. I do have one request - given the enormous size and the huge variation in scale of just about everything in the various images you display, would it be possible to add a legend or scale to these images? I often get lost wondering whether a galaxy you've displayed is tens of thousands light years across or a few million.
@mathmusicandlooks5 жыл бұрын
This is the first time I’ve found a clear explanation for how a black hole forms the jet streams of a quasar. Fascinating video! Thanks! You look great, too.
@danbigtasty91643 жыл бұрын
4.38 that's going to be my new tattoo! Wanted black hole tat! That's the one! Thanks Dr bex xx
@gaywillsmith88715 жыл бұрын
2:28 did I hear that right? 😂
@justanotheryoutubeaccount22704 жыл бұрын
A Freudian slip, I hope 😄
@anuragthakur43414 жыл бұрын
Hahaha
@jarettramagos83995 жыл бұрын
I love your videos, you make learning alot of fun and easier to understand. I can't wait for your book to hit the market. Please keep the amazing videos coming. Much love from backwoodsTennessee. 🤣
@AlanCanon22223 жыл бұрын
My childhood illustration of a black hole was Figure 14-17 from "Astronomy: The Structure of the Universe" (William J. Kaufmann, III (1977) p. 449). I have a copy from the same printing in my lap as I type. There's a lovely half-tone illustration of the old spacetime funnel swallowing inbound line drawings of a radio, a loaf of sliced bread (the slices are falling out of the wrapper), a clawfoot bathtub complete with shower head, a quill pen, and, best of all, a dinosaur! Sadly, all that remains of these explorers after passage through the funnel is "Mass, Charge, Angular Momentum". I recently reacquired this childhood astronomy text because I want to compare what was known in childhood with what's known today in astronomy. This video from Dr Becky has me dusting off my Kaufmann and opening Chapter 13, which describes the discovery of as much as was known about quasars in 1977. The big new anomaly to explain was the quasars' massive redshifts. Perhaps it was gravitational: the quasars could be supermassive so as to drag local spacetime to such an extent that the emitted light was redshifted at the factory, so to speak. But the masses required would undergo gravitational collapse and necessarily be black holes (what a foretaste of glory divine, I'm not a physicist but it seems they were reaching the right answer, but for the wrong reason). Another idea, that quasars represented nearby objects expelled from local galaxies at enormous speed, was easier to dispose of: if that were the case, there would be as many coming towards us as away (blueshifted v. redshifted), and all the known quasars were redshifted, none blueshifted. The emerging dominant idea therefore placed the quasars out among the distant galaxies, but there were problems. The most distant galaxy yet seen was 8.5 billion light years away, and the quasars' redshifts placed them enormously farther away, 15 to 20 billion light years away, more than double the distance to the edge (in 1977) of the observable universe. The brightest galaxies then observed, cD Ellipticals, would never be detectable to the best telescopes of the day at such a distance, so quasars must be stupid bright: the equivalent of billions of suns, for them to be observable in 1977. So they must be big, to generate so much power. But they were observed to be variable, which means they're compact, much smaller than the diameter of a galaxy. Kaufmann ends the section with these words: "When someone finally figures out what quasars are, mankind will have made a major breakthrough in discovering new laws of nature and will have arrived at a much deeper level of understanding physical reality." Looking back from 2021, knowing only what I know (as the 52 year old version of the ten year old me that marveled at the Kaufmann book), it seems that the data on the true nature of quasars was staring them in the face. Accurately measured redshifts only fit great distances for the quasars. Late 20th century astronomers were masters (and mistresses) of accurately measuring brightnesses, too, for sure, with their super sensitive films, 200 inch telescope, heterodyning radio receivers and massive radio antenna arrays, etc. I'm sure we have sharper data now, but what they had was accurate to known limits of experimental error. Why was it still a question? It seems now that there was the need for a leap of the imagination, to believe the data before them, which implied that the universe was far larger in size than that implied by the feeble light from the most distant galaxy then observed. What Timothy Ferris, in his "Coming of Age in the Milky Way", calls "Raising (and Lowering) the Roof". Thanks for such a wonderful series, Dr Becky, it's a thrill to contemplate how much has been learned just in our lifetimes.
@LeeBotton5 жыл бұрын
This is brilliant! Such a great explanation. Really enhanced my understanding. Thank you!
@benhavlicek70694 жыл бұрын
The reck it ralph cut away really got me
@vdiitd5 жыл бұрын
Great video! Just one feedback: you don't need to insert random video clips throughout the video. Your videos are interesting enough by themselves :)
@rik.marshall5 жыл бұрын
This is so true, these clips are just a distraction
@johnny_eth5 жыл бұрын
They break monotony. That helps refreshing the attention of the viewer over 10 minutes of straight talking. It also adds a bit of a comedic edge which I'm sure she wants to have.
@kennethhicks21135 жыл бұрын
I enjoy them myself and is one proven methid of youtubers. Do what you like, re-evaluate and adjust IMO.
@memermetalthemiddleagedaut995 жыл бұрын
I love your videos so much I pre ordered the book
@DrBecky5 жыл бұрын
Thanks 🤗👍 you’re awesome for pre- ordering 💪
@saultube445 жыл бұрын
I don't understand, if Fgrav=Frad then that means stable forces, so means no material would be moving in any direction, so what the Black Hole absorbs/accrets energy from that dynamic equilibrium? I like your bloopers at the end, your human side, funny and sweet :D
@mikespilligan14905 жыл бұрын
My wife was asking who is the Becky you keep telling me about astronomy from. I showed her your channel she's relativitly happy now.
@pgoeds74205 жыл бұрын
She'll only be happy with a Minkowski coat.
@Quantum-5 жыл бұрын
Mine saw me watching her and told me I'm obviously not watching for the physics... Too smart for her own good.
@Phoenixash-delfuego5 жыл бұрын
So now you and the other Becky don't need to worry about getting caught............... That was a joke wife of Mike Spilligan.
@Paxaboll5 жыл бұрын
Thanks for your content! You have a very easy manner and explain things quite well. Keep up the good work; a star in the making with a nebula, you are.
@kevinm37515 жыл бұрын
That is insane, I cant even wrap my head around something of that mass! Thanks for the explanation, very compelling indeed!
@CarBENbased5 жыл бұрын
Of all the youtube and other hype that's followed the pictures of the supermassive black hole, this is by far the most interesting calculation and conclusion I've heard. Before this I always thought that black holes would just continue to grow and grow over the age of the universe. Now granted over trillions of years mergers will produce black holes larger than this limit in the black hole era, but it's interesting to know that before then the size will be limited.
@AllThingsRuckus5 жыл бұрын
My favorite channel.
@StaK_19805 жыл бұрын
"ISCO ISCO ISCO ISCO" ok, I'm dead from laughing! :-)
@paulmillcamp5 жыл бұрын
Very informative and entertaining, and you explain things clearly. Nice style of videos :) Regarding the formation of black holes way back when in the early universe, it might also be interesting to mention a theory about 'direct-collapse black holes'. These are theorized to have formed during the 'primordial' universe, not from the death of a star, but directly from an extremely hot, unstable gas cloud. They're predicted to be able to weigh up to 10^4 to 10^6 solar masses at their 'birth'! Pretty crazy. Anyway, yeah, I'm going to watch another one of your videos now, haha :)
@DomoKuchikan5 жыл бұрын
Nice closing line in this video :) Sort of dramatic and funny :D
@WayneTheSeine5 жыл бұрын
Amazon to notify me when the book is available. Since I don't have you available to tell me bedtime science stories..... I got the book instead. :P Love your videos.... awesome.
@ivan-Croatian5 жыл бұрын
I still don't get it. If a black hole is a collapsed matter into itself, how come they can be bigger or smaller? Doesn't the matter collapse into a single point in the middle of a black hole? If a black hole swallows let's say a star, isn't the material of a star forever lost in a singularity of a black hole? Sorry if I sound ignorant but I'm not a physicist and I would really love to be able to wrap my mind around that.
@robertgalindo59795 жыл бұрын
In this context bigger means more massive. As in how much mass it has.
@ivan-Croatian5 жыл бұрын
But the matter is giving things gravity and mass, right? If the matter is lost, how come it still gives gravity and mass?
@sleepy3145 жыл бұрын
@@ivan-Croatian It is not 'lost'... it is there inside the event horizon. It distorts space so that once past the event horizon all paths intersect the singularity. This is the general relativity explanation, but somethiing as yet unknow happens due to quantum! We do not yet have a quantum gravity theory .... although we have a lot of possible theories that are being tested.
@sh4d0wm4ch1n35 жыл бұрын
so happy i stumbled upon this channel. it is always a pleasure to watch your videos
@sebastiaosilva72495 жыл бұрын
I'm having a lot of fun pressing the '5' key :-)
@imgonnagogetthepapersgetth83475 жыл бұрын
Thanks! I never knew that 5 did that!
@rickedenvall67315 жыл бұрын
@@imgonnagogetthepapersgetth8347 as a mobile user, I can't help but ask what the key does?
@imgonnagogetthepapersgetth83475 жыл бұрын
@@rickedenvall6731 it repeats the last second of what you're watching.
Thanks for your amazing videos :) Could you please expand on what you mean when you say that black holes will simply wink out of existence if they get too big to acrete any more material? Wouldn't they still just hang around?Thanks.
@jordak62003 жыл бұрын
I know this is an old question, but I think I can help answer it. She doesn’t say the black hole will wink out of existence; she says the quasar will (the quasi-stellar object, i.e. the super-bright observable part of this thing). Meaning if it’s too big to form an accretion disk, then it will no longer undergo “luminous” growth, meaning we will no longer be able to directly see it in the sky. I think this is made clear by the blue line and the blue text in the graph at 10:44. Hope that helps over a year later!
@leonardpisa87314 жыл бұрын
I just came across your site. You don’t talk down to people as others are. You are the best astronomer I’ve come across. I do have a question, when Pluto was photographed a few years ago it was bright enough to look like how the moon looks.. how could it be so bright when the sun is a pin prick in the sky?
@DrBecky4 жыл бұрын
The probe that took the image - New Horizons - had a very sensitive camera on board and opened its shutter for a very long time to collect as much reflected light from Pluto as possible
@tehlaser5 жыл бұрын
Quasars winking out and the expansion of the universe eventually making other galaxies unobservable makes me wonder how many other phenomena observers might have seen a few billion years ago that we'll never know about.
@leifharmsen4 жыл бұрын
It depends on how empty the space is around it. The size of black holes is regularly massively underestimated because the speed of their discs is underestimated given how slow the speed of time is near a black hole where time practically stops inside.
@kennethhicks21135 жыл бұрын
A young star in the making! Thanks for educating, please keep doing it.
@SirLucidThoughts5 жыл бұрын
Awesome video!
@mischiefmanaged10455 жыл бұрын
Absolutely love your videos! Recommendation on editing... Please lose or minimize the injected clips. It makes things feel a bit like it's trying too hard. Your amazing perspectives are quite exactly what I come here for. You don't need to become another generic science communication show. Great question and great answers. My favorite was whether or not black holes accrete dark matter, well done.
@HyperQbeMusic4 жыл бұрын
I've actually been thinking of galaxies as giant accretion discs for giant black holes. Glad to see that wasn't such a crazy idea! :D
@Thunderwolf6665 жыл бұрын
This was an interesting video. As a consequence, I hovered my mouse pointer above the icon reminiscent of a stylised upturned thumb and clicked the left mouse button, thus registering the fact that I "liked" the video. I have to go now. My planet needs me.
@ChrisSmith-lk2vq5 жыл бұрын
Hey Becky! I would love to see a video about "how can black holes grow at all, given time dilation from the perspective of an external observer." So not "how does matter fall into a black hole (coordinate transformation)." but "why do we see black holes grow?" That would be awesome! Love your show!
@UltimateBargains5 жыл бұрын
BH grows as matter accumulates because there is no such thing as a quantum singularity. The gravity is curved space around the matter. More matter creates more curvature. If matter disappeared into a quantum singularity at 0,0,0 then there is less curvature and less gravity. Therefore, there is no quantum singularity, because the gravity still exists. There is a point of equilibrium as matter is compressed to reduce the curvature (i.e., the gravity). Thus, the BH must grow in volumetric size as matter accumulates.
@ChrisSmith-lk2vq5 жыл бұрын
@@UltimateBargains no my question wasn't concerning the growth in matter-filled-volume because that's inside the event horizon and so we don't know and don't care. No my question was due to the time effects near the event horizon. I know you can transform coordinates that matter viewed from the falling matter wouldn't even notic the event horizon and falls right through. But what's with a external observer (us)? Wouldn't we see the matter slow down (shift red) until it asymptomaticaly stops outside/at the EH and so never reaches the BH so -> BH wouldn't accumulate matter inside its EH so BHs EH wouldn't grow? I was never able to sort this out. Greetings
@AHSears5 жыл бұрын
LOL I love your blurb inserts.
@antoineroquentin22975 жыл бұрын
Q: How big can black holes grow? A: Yes
@no_more_free_nicks5 жыл бұрын
Black holes, black holes, black holes, we all love you so much, but not enough to want to meet you in person.
@ChrisMuncy5 жыл бұрын
Got my book order in!
@fancycoat99005 жыл бұрын
I really like your content, just kind tripped over it this weekend and already watched a few of your older ones! Keep up the great work! I can listen to space all day! Your Friend from the Esoteric order of Dagon.
@BreakingBarriers2DIY3 жыл бұрын
Dang it! I missed so much information because I kept thinking about mergers...need to listen again.
@terrygoyan5 жыл бұрын
Dr. B, when do you move into your new digs? I want to see your diploma hanging on the wall! Thank you for another great video. It seems that so much astronomy is anti intuitive. Having a limit to how much material a black hole can accrete is an example!
@bazpearce99935 жыл бұрын
Makes me think that the big-bounce theory could be more likely than a single big-bang Universe. Always had a sneaky little penchant for that one over a single event.
@elemu36535 жыл бұрын
Agree, makes more sense somehow 🤗
@rogersledz67933 жыл бұрын
Thank you so much for uploading this video. It is helping me to get through the pandemic!
@crouchingtigerhiddenadam13525 жыл бұрын
I've always wanted to ask: because of time dilation due to gravity, do events or mass even exist at the singularity? If there is no time, no meaningful kinetic energy and so no time, no particles, how could anything exist?
@cavalrycome5 жыл бұрын
As I understand, there are all kinds of reasons to doubt that a point-like singularity can exist, but quite apart from that, you don't need to equate time stopping with time not existing. If time has literally stopped, you have a final instant of time in which things exist. The same goes for the Big Bang singularity. It is not the case that all of the matter of the universe came into existence at the moment of the Big Bang since all of the matter of the universe existed from the first instant and there was no prior instant. There was never any moment in time when it didn't exist.
@vaevictis58785 жыл бұрын
Hey there I have have a question. If the big crunch did happen wouldn't all the black holes merge together?
@capacamaru5 жыл бұрын
So.. at what mass would the accretion disc be spinning at the speed of light? Would all the matter in the universe be enough?
@RedRocket40005 жыл бұрын
Infinite universe having near infinite mass would have enough which is why them saying infinite universe and expanding universe from the same sources drives me batty. But I assume that the spin would get closer and closer to the infinity amount of energy needed to reach the speed of Causality better known as the speed of light but never reach that speed as energy in the form of matter cannot reach that speed as the amount of energy in the universe is less than infinite. Mass less energy like light of course travel at the rate of Causality in a pure vacuum. Only thing observed to travel faster than Causality is SpaceTime itself which has expanded faster than that speed.
@johnny_eth5 жыл бұрын
Particles with mass cannot move at the speed of light. They can come very near to it though.
@capacamaru5 жыл бұрын
@@johnny_eth but light can. Could you have a blackhole with enough mass that you could have light in a stable orbit.
@MrCoxmic5 жыл бұрын
nice explanation
@mikespilligan14905 жыл бұрын
Book called, Space : Space is big. Really big. You just won't believe how vastly, hugely, mind-bogglingly big it is. I mean, you may think it's a long way down the road to the chemist, but that's just peanuts to space.....the end.
@woodrick885 жыл бұрын
And always remember the most important advice of all. . . . Don't panic
@grahamsecr36775 жыл бұрын
And don’t forget your towel
@mat_name_whatever5 жыл бұрын
All-encompassing black hole: "...so its not like thats a possible doomsday scenario" Reason that thats not happening: another doomsday scenario.
@Lucius_Chiaraviglio5 жыл бұрын
Seems to me that once you get the innermost stable orbit out to the point where gas self-gravitates to form stars, you don't stop accretion entirely, because the stars and other things formed out of the orbiting gas would still interact with each other gravitationally, thereby still enabling momentum transfer so that the inner things can still spiral into the black hole in the course of causing other things to be ejected (or, given enough time, in the course of throwing off gravitational radiation). So the accretion process wouldn't look like a quasar any more, but it would still feed matter into the black hole, even if not as rapidly (and as the black hole continued to scale up, the rate would scale up accordingly as long as more material was available).
@dantee39445 жыл бұрын
Loved your explanation, makes my head spin, great video Dr Becky. FYI Real Madrid have an Isco too 😄
@traviskidd42925 жыл бұрын
How long does it take light to travel the distance from the event horizon to the edge/end of its gravitational effluence? Could the effect of time dilation render that light older than the universe?
@ArchitectMouaed4 жыл бұрын
متوهجة دائما في سماء المبدعين
@PtolemyJones2 ай бұрын
I always sort of assumed that a black hole could eventually absorb everything, and still not be full.
@donmilland76064 жыл бұрын
im hooked on her videos!
@patnolen80725 жыл бұрын
I am delighted to learn about extraterrestrial space by watching your talks! :)
@m98de5 жыл бұрын
Well done Becky
@fabioferronato5715 жыл бұрын
In the first minutes of universe, just after the Big Bang, what prevented the whole mass to collapse under its own gravity and become a black hole?
@ZeroCharisma5 жыл бұрын
Near equal gravitational pull from all directions; It was ony slight quantum fluctuations that has allowed the present structure of the universe to delelop. The Big Bang happened everywhere, that is why there is no centre to the universe and why the CMB raditates from everywhere.
@RedRocket40005 жыл бұрын
@@ZeroCharisma Which makes the amount of energy which includes matter approach infinity if the universe is infinite which is a different version of infinite than the one I looked up in depth as something that has a size and expands cannot be infinite under that definition. I heard I believe on PBS Spacetime that there are different types of infinities said casually and without follow up once. In any case I need to learn more.
@christopherlawley18425 жыл бұрын
@RedRocket4000 It gets worse some infinities are bigger than others. "Numberphile" here on YT has useful videos
@bbbl675 жыл бұрын
Around a decade ago, they were saying that the most massive a BH can get is only about 10 billion solar masses, but now we know of several over that size. So how confident are you that your limits are real now? Also what do you think of the calculation that shows that the entire mass of the observable universe can fit inside a BH with an event horizon of around 500 billion light years?
@GREGGRCO5 жыл бұрын
THANKS ! Great Lesson ! Good Luck on your allergies. You remind me of Dr. Wendy O. Welch. Thanks for learn'n me! Enjoyed the topic !
@willis9365 жыл бұрын
Doesn’t frame dragging also play a key role in black hole accretion? Also isn’t it possible that SMBHs are primordial so their starting mass could have been large?
@mykobe9815 жыл бұрын
That was Great!!! Never seen anyone explaine that before, and I watch a LOT of this stuff.
@greennights23883 жыл бұрын
I think, looking at the universe, this is what imagination looks like if you could step outside and see it, the resonance of curiosity beauty and wonder.
@pioneer_11485 жыл бұрын
Question / video request - why didnt the big bang immediately collapse into a black hole given the matter/ energy density.
@NPrinceling5 жыл бұрын
That's something I often wonder myself. My best guess is that inflation was so rapid that it overwhelmed gravity. We also know that expansion is greater than the gravity of the entire universe, if I'm not mistaken, which is one reason it's expanding, and that would have presumably been true of the early universe too, thus, no collapse.
@parkershaw85295 жыл бұрын
66B is the max mass BH can form an accretion disk, without an AD, it's not easy to see a BH across the visible universe, so, the fact is we are not really sure whether there are more massive ones hiding out there.
@rayhuster52125 жыл бұрын
In with a bang,out with a whimper? This is beginning to sound like an Azimov story! Maybe "The Last Question"? Or "The Final Question"? Its been years! I enjoy your vids! Keep em coming!
@AnexoRialto5 жыл бұрын
Love the effort you take in simply explaining some rather complex concepts. Any chance of tackling dark energy?
@DrBecky5 жыл бұрын
It’s on the list don’t worry 👍
@panther1055 жыл бұрын
I see massive black holes every day when I look into my co-workers faces and ask them to help me with some task. I have trouble with the disc image of matter spinning around a black hole and it not being a full sphere of material like a giant cloud spinning in all directions at once. I guess the subatomic model doesn't apply here. Also, if matter is "disappearing into the black hole and, I thought, going somewhere out of our universe, then why would a black hole get larger?
@Scribe130135 жыл бұрын
To infinity and beyond
@BrisketChef5 жыл бұрын
Dr. Becky, have you had any videos, or could you talk about Hawking radiation in regards to Black holes dissipating? Thank you! Keep up the Science!
@kencory24762 жыл бұрын
I can't remember where or when, but Isaac Azimov wrote an essay in which he supposed that the entire universe is already a giant black hole. The density calculations work out, apparently.
@frogstamper5 жыл бұрын
I love your videos Dr Becky, they are always so interesting and informative not to mention entertaining...also it always makes me laugh when you use the word piddly.:)
@DrBecky5 жыл бұрын
It’s one of my favourite words 😂
@storyspren5 жыл бұрын
How big would the radius of that 10^60kg black hole be?
@BillyJames5 жыл бұрын
Dr. Becky - Please make a video covering Time Dilation. Many thanks and love the video
@jcinaz4 жыл бұрын
66 Billion! A few weeks ago the biggest one I read about was only 16 Billion! Whew!
@SeamusDonohueEVEOnline5 жыл бұрын
12:23 Don't you mean "winked out of visibility"? The quasar will go dark because there's no accretion disk, anymore, but the black hole is still there and will still spaghettify anything that gets too close, right?
@karstent81385 жыл бұрын
Hi Becky, are you saying, when the BH gets big enough, it cannot have a stable circular orbit because the matter in the galaxy around it is attracted to itself to the same extent as it is attracted to the black hole, so things get kind of muddled around there, and things that get preferentially attracted to the black hole just fall directly into it?
@ComiXDude5 жыл бұрын
i'm wondering the exact same thing. it wasn't clear.
@DrBecky5 жыл бұрын
Yep - exactly that - and it’s mindboggling for me to get my head round it too 👍
@camillechretien4923 жыл бұрын
Thanks for this great video! Love your channel :) There is a question which is killing me for years. I'm gonna ask it here in case you read that comment and have time to answer :) From the point of view of an observer, away from a black hole, an object falling towards the black hole will have its time slowed down until being totally stopped at the event horizon. Is that right? If yes, how come a black hole can grow, from our point of view (earth)? Any object (accretion disk, other black holes, stars, etc.) would never pass beyond the event horizon as, from our point of view, the object is frozen in time. I know I am wrong somewhere, cause black holes can grow. Would you please be able to explain me what I am missing? Please note that I am aware that from the point of view of the object falling towards the black hole, time passes normally for itself. Thanks in advance :)
@michaelsommers23562 жыл бұрын
The black hole acts as though all the mass and charge that fell in is smeared out over the event horizon.
@primeusante72245 жыл бұрын
I am interested to know how black holes and dark energy and dark matter is affecting eachother! Is dark matter in such high percentage of space it should have some effect on the black hole I would think!