The ancient CRT monitors had one major advantage - they were big enough and warm enough that the cats would curl up to sleep on top of them, and they couldn't knock them over.
Cats like learning too, they don't have to be looking at you, they hear all, and cats do experiments on gravity, that's why they'll push things off the shelf and slap other things off
"Is there a conflict of interest?" Yeah. Yeah, I'll just stop you there. Yes. All the conflicts of interest. And not a single one of them being the public interest.
Like I said the other time, I find the "black holes as dark energy" idea really unconvincing from a *theoretical* perspective. Because Alan Guth already studied the behavior of what amounted to a black hole full of dark energy back in the 80s, and it doesn't do that. It looks like a normal black hole from the outside, and *inside*, it explodes into a new baby universe (yes, it's bigger on the inside, but not as well-behaved as a TARDIS), but we can't see that happening. This idea that exterior cosmology should somehow be coupled to what goes on inside the event horizon even though we can't see it... it doesn't make sense to me.
Could the quantum warp inside a black hole really create a pocket universe, and, if so, at what order of magnitude would time be flowing more slowly than in the parent universe?
Hubble, imo, should be indefinitely maintained until we can (1) fund a true replacement and (2) bring it back to Earth. It is just too important of an observatory-and too accessible-to let it decay like another piece of space junk. Hubble not only unlocked countless scientific breakthroughs; it brough the public back into space in a way we haven't seen since the Apollo program. It truly belongs in a museum.
Wow. That DESI discussion was an example of you'al pulling the public towards the professional's understanding. Nice job. But, I'll have to watch this video a couple of times.
When they put the bowling ball on a trampoline to illustrate how mass warpes spacetime, notice that the surface of the trampoline increases. Just saying....
Regarding shipping humans past LEO: It's not worth even going to the moon unless the plan is mapped out to a point where earth could quit supporting the colony without the colony having any concerns about their long term, many generational, survival. You could presumably build, launch, land and operate a few dozen Curiosity/Perseverance type rovers for years for what it would take to put a less than dozen humans in one location for less than a year.
for going past the moon, definitely. Lunar resources are much more fuel efficient for doing anything large scale in low earth orbit than lifting metal, water, and propellant from earth, so that's one reasonable economic case that could support importing difficult-to-manufacture durable goods long term since it's not actually that far. There's also a decent chance of finding easy-to-access rare earth deposits on the lunar surface that you could mine very simply and that's high value enough to consider shipping back to earth, though I admit that one is a little more out there, and depends a lot on the difficulty of setting up or restarting viable mines on earth that don't poison the water table.
@@thamiordragonheart8682 even for lunar mining, I'd question if it's cheaper to ship humans or robots. Other than dealing with equipment breakage and the like, I don't see anything humans would be doing that wouldn't be remotely operated, even if the operator is only in a pressurized rover 10m away.
Omigosh your kitty in the background is being too cuuuute! ^^ Perseids is my favorite meteor shower too, but I'm still so sad the moon is gonna outshine the Geminids shower :( Not like I can see it well regardless since I live in the city. Thank you Dr. Becky as always for putting in the time and energy and knowledge into these videos! I always look forward to your posts! This one about dark energy being coupled with black holes was a bit dizzying but still fascinating. I need to rewatch though I think to fully absorb lol
So, from what I remember about Gaussian surfaces is that they can be used to explain the inverse-square law, the one we use to describe gravitation in our solar system, within galaxies, and between galaxies. These surfaces are also used to mathematically describe magnetic fields. As I recall from E & M which I took many decades ago, magnetic materials (not just magnetized ones) can affect the shape of magnetic fields. What if massive objects affected gravitational fields analogously? I mean, what if they did it in a way that was subtly different than the one Einstein's general relativity describes? How can we be certain that a massive object in the gravitaional field of another object does not affect the field in a way that is analogous to magnetic materials in magnetic fields? So, for example, lots of stars in a galaxy could change the gravitational "permeability" of space, flatten the Gaussian surface perpendicular to the field lines, and cause gravitational acceleration to decrease at an amount different from the inverse square law. I wonder, do small galaxies seem to have more missing mass, or large ones? If it's the latter, then I think this might be a helpful idea to contemplate.
If black-holes grow from vacuum energy, what effect does that have on excluding primordial black-holes based on the missing observations of them evaporating?
Astrophysical research will not suffer as big cuts as climate one. The Orange One and his disciples do not like the results of climate research in general. So I am very deeply concerned about the American satellite observation systems. Of course they serve both climate research and weather observation so the main victims will be people not warned about a hurricane because circulation models will lack good data. It is so predictable and the therefore so sad.
@arctic_haze While you are right that there's people who don't want the climate satellite's, even if there are cutbacks, in no way will that affect hurricane weather forecasting. But, for several years now I thought those people aren't very sharp. They should be 100% behind getting as much real data as possible, I am. Trump, Elon, Vivek and team, are going to create a "Golden" era and unlike the Democrats, he knows how to do it. Starting with people who are actually competent.
Why should only black holes couple to dark energy - instead of general concentrations of matter doing the coupling? As the universe ages, matter concentrates ever tighter into the cosmic web, galaxies, and all sorts of compact objects (not just black holes) - and all these mass concentrations pull on spacetime too. Then perhaps that locally stressed spacetime causes expansion of the surrounding relatively less-massive large voids and general intergalactic space, in some kind of a direct feedback?
i have a british friend who sent me a pic of snow covering the ground... we didnt even have any snow yet here in eastern canada, heck we havent had a white christmas in years
Dr. Kathy, a question for you: Could you do a breakdown of the (now not especially new) updates to the black hole photos which have the magnetic field lines superimposed over them? I am hoping to learn things like the following: 1) Whether the resulting superimposed image is in any way representative of what a person would see in reality if they could glean that much detail, or if it is dramatically exaggerated, 2) The exact nature of the start and stop points which many of the lines exhibit upon close inspection-these look particularly non-true-to-life and suggest the entire work is in large part artistic interpretation cobbled in Photoshop. Magnetic field lines do not start and stop with complete abruptness like that.
How cool would it be if it turns out there is a equivalence relationship between energy and spacetime, and black holes are converting energy directly into spacetime. We'd literally be made out of the fabric of the universe itself.
Did you see latest Hossenfelder video, she said latest webb's data result shows there is no dark matter helping built the first big galaxies, they should not exist. So wether the age of the universe is wrong or there is no dark matter .)
Dr. Becky. Wishing you and cat and kin and kind, all the best this holiday season. Its about this time of year that I usually fall into an infinite black hole so I know they do exist. Thanks for all your great postings of knowledge expanding videos...
Dr. Becky, if Hawking was correct about black holes slowly, or fast, evaporating, why would you expect some kind of high energy release when the black hole disappears? Does his theory show the black hole going out with a bang or a whimper-just fading away into "space"? If it goes out with a bang I would expect there to be indications of that as the black hole was shrinking when we ever find one to observe.
Hmm "Could black holes explain dark energy AND the crisis in cosmology", maybe explain a small part of it! but we need to change our model as JWST keep's showing us some thing's are a lot bigger then what we think we should be seeing for example the super massive galaxy's in the early universe or super massive black hole's that break all of our predicted outcome's? but confirms predictions made with Modified Newtonian Dynamics, MOND.
18:15 I am slightly distracted by your fabulous hair: especially when it switches sides between cuts… - the asymmetrical version is especially drawing my looks. 😊
This was such a good episode, I just love the little things you can learn and yes much is often beyond me but that doesn't detract in any way from my enjoyment Thanks a Lot.
9 times over allocated time on JWST Or there's studies that overlap and want to study the same object. So they've allocated 9x studies that have similar observations.
In ‘A Brief History of Black Holes’ you offer that Taylor Swift is the greatest lyricist of our generation. Awesome, but I just want to say, what about Lorde?! Have you listened to Lorde?? Great work as always. Love your videos and your book.
I'm confused about pictures showing black holes. I think of it as a black ball with the event horizon formed as a donut shap of mass rotatiog around it. Like😮 the rings around Saturn . But when people try to represent the donut from different angles, part or the donut is squashed out to one side. Like the donut has a fat area or the donut is not all in the same plane. I hope this makes some sense. Can you explain why they look like this? Thanks, MIke
For some reason vacuum energy reminds me of perpetual motion. So rather than claiming that aliens built anything we don’t fully understand, I think we need to continue studying the universe. We have barely started learning about the universe. Just like 150 years ago we thought we had it all figured out and the only thing to do was add a few more decimal places to our knowledge.
Is there a point where the study of black holes reaches a limit since we can never truly know what's inside them? It feels like an insurmountable problem, as the best we can achieve are mathematical inferences about what might be happening. On top of that, we have dark matter and dark energy-phenomena we can't directly see or detect-and black holes, where we can't say with absolute certainty what's going on internally. How do you maintain your sanity while studying such elusive mysteries?
Being able to detect asteroid-sized primordial black holes should be good. The less massive a black hole, the sooner it evaporates and based on the life of the universe primordial black holes should have a minimum size in order for them to not have evaporated. From memory (and I might be mistaken) the asteroid-size mass is the biggest spot left where we haven't yet ruled out the existence of primordial black holes. We should also not forget that it is entirely possible that there are more than one single solution to dark matter; it can be a mix of various solutions. And even if it doesn't solve dark matter, it would still be nice to know or to rule out primordial black holes of various sizes.
So.. you're saying in a universe that creates matter in a void from radiant energy, then said matter falls into a black hole, which takes said matter, and converts it into dark energy, which grows space, so it would create more void, so more matter creation... sounds like a cyclical thing like we see all around in the universe :D But that also alludes to an eternal and eternally growing universe :D
My first question on the black holes growth coupled to dark energy idea: what the mechanism of this coupling is (if it exists)? second: what prediction can be made to definitively test the idea?
I am not a physicist or a scientist of any sort. I have no particular right to or reason for the following position. But I’ve long suspected that black holes were somehow involved in the expansion of the universe. I also suspect that time is not being accounted for properly in the way we think about black holes and gravity. But someone much smarter than I am will have to figure that out
Can you do a video on two similar proposals for telescope time and why one was approved and the other not? I’m curious about how the decision is made if two different groups want to study the same thing. Also, I’m pretty sure a primordial black hole caused the tripod to wobble and not Pippin. Pip is innocent.
Could the super giant black holes at the center of galaxies be the primordial black holes? That would help explain how massive they are without enough time to grow that massive
I'm having so much fun watching while actual scientists figure out if the expansion/structure problem is a case of spherical cows everywhere or something deeper. Keep looking up!
Re measuring the distance to Mars to detect primordial black-holes: I wonder if that could be combined with a dedicated communication platforms at Mars? A platform to allow high bandwidth data return from Mars would have lot of the equipment needed to do high precision range and rate measurements.
At @23:30 you say something that is confusing me every time I hear it. If the red-shifts of very far galaxies were larger than anticipated from the extrapolation of the red-shifts of near galaxies, then that additional red-shift would be the result of a higher expansion rate of the universe in the past, and thus the expansion rate of the universe would have to be slowing down. In order to conclude that the expansion of the universe is accelerating, the evidence must be that the red-shifts of far away galaxies are actually smaller than anticipated. I seem to remember that the original data actually supports my logic, but I don't remember which source I checked.
I’d bet the banks that’s not gonna happen bc Dr B is dogmatic towards the mainstream and academia theories/beliefs, she may get less funding or less views so she won’t even touch it just like the ufo phenomenon. It’s a sad science world by 2024, ots hardly actually science with the amount of dogma and suppression/rejection of science they don’t agree or comfort with.
It is my understanding that the team who is granted time on the JWST has dibs on the data from the instrument they requested, but what about the other instruments? I assume the other instruments still observe adjacent patches of sky; is that data available to anyone or is it also exclusive to the original requestors?
The ancient CRT monitors had one major advantage - they were big enough and warm enough that the cats would curl up to sleep on top of them, and they couldn't knock them over.
And they have an after glow like objects falling into a black hole (without the red shift)
You need a CRT to play old games like Duck Hunt and Hogan's Alley. The Zapper won't work with LED screens.
@@essaboselin5252 I remember someone saying something about hertz refresh rates not mattering on CRT ones, but I don't know the validity of that.
yes, but they would also pee into them because the hot PCB in early monitors (and other electronics) released a smell similar to urine.
@@MetalkattLight pen needs the raster scan to pinpoint position.
@24:13 "Pressure pushing down on you..."
Wasn't that part of research released by Bowie, Mercury and collaborators c. 1981? 🎶
V. Ice ripped of their paper and tried to pass it off as his own research 😂
ba na na na na na na
I love the sass of counting "if"s
I propose a new paper, "Cats And Their Effect On The Success Of Science Communicators"!
wait, was there a science communicator in this cat video? 😋
Cats like learning too, they don't have to be looking at you, they hear all, and cats do experiments on gravity, that's why they'll push things off the shelf and slap other things off
As much as I hang on your every word during these, when Pippin is in the background anything you are saying becomes white noise 😄
oooh a night sky news, i love- CAT. THERES A CAT. OH MY GOD CAT
What is that person doing on a CAT video?
CAT: there she goes again - bashing the camera around! 😼
Skipping ad bit--oh, kitty! I can't skip the kitty!
❤
A god cat?
"Is there a conflict of interest?" Yeah. Yeah, I'll just stop you there. Yes. All the conflicts of interest. And not a single one of them being the public interest.
Not spending $175 Billion to antagonize war would be a good start towards a better budget.
Elon wouldn't be known if not for his government funded tesla and space x
Theres rumours of sls getting canceled tho, which would free up a ton of the budget
@Metalkatt conflict of interest, Elon's space x and tesla get the most government funding and contracts and was just put in the Whitehouse
YES that's the definition of conflict of interest
Not spending $175 Billion to antagonize war would be a good start towards a better budget.
@jeffreygrant817 stop repeating yourself!
I love when your cat makes cameo appearances in your videos, such a pretty kitty.
Me, too! Hi cat!
And such a happy kitteh, too! :)
Like I said the other time, I find the "black holes as dark energy" idea really unconvincing from a *theoretical* perspective. Because Alan Guth already studied the behavior of what amounted to a black hole full of dark energy back in the 80s, and it doesn't do that. It looks like a normal black hole from the outside, and *inside*, it explodes into a new baby universe (yes, it's bigger on the inside, but not as well-behaved as a TARDIS), but we can't see that happening. This idea that exterior cosmology should somehow be coupled to what goes on inside the event horizon even though we can't see it... it doesn't make sense to me.
When I was younger I had the thought that dark matter could be burnt out black holes, but their gravity and hawkings radiation kinda proves that wrong
Could the quantum warp inside a black hole really create a pocket universe, and, if so, at what order of magnitude would time be flowing more slowly than in the parent universe?
Primordial black holes are the cause of missing socks in the dryer.
Hubble, imo, should be indefinitely maintained until we can (1) fund a true replacement and (2) bring it back to Earth. It is just too important of an observatory-and too accessible-to let it decay like another piece of space junk. Hubble not only unlocked countless scientific breakthroughs; it brough the public back into space in a way we haven't seen since the Apollo program.
It truly belongs in a museum.
"interesting" ... such an optimistic word for such circumstances
Not spending $175 Billion to antagonize war would be a good start towards a better budget.
I wanted to focus on the video, but I can only see the kitten playing with the screen 😹
Spider cat, spider cat. Doing things that a spider cat can.
Wow. That DESI discussion was an example of you'al pulling the public towards the professional's understanding.
Nice job. But, I'll have to watch this video a couple of times.
24:10 Pressure? Pushing down on me? Pushing down on you? No man asked for...
Negative pressure. Pushing up off me. Pushing up off you. Actually a quite few men and women asked for (most astrophysicists mainly)
When can we expect Astrophysicist Cat merch? 😊
More Cat Bloopers please!
Thankyou for your content Doc, you’ve revitalised a love of the cosmos in me that’s been dormant for decades, keep that passion coming!
Thank you, Dr. Becky.
Pretty sure David Kipping has his eye to the glass on JWST as we speak. Can’t wait to see what his findings are.
Cant wait to see the results of his current observations
Don’t worry too much about conflicts of interest - it's almost certain that the new US administration won’t. At all.
😂😂😂
Not spending $175 Billion to antagonize war would be a good start towards a better budget.
Evening Dr Becky. A pleasure to see you this evening!
When they put the bowling ball on a trampoline to illustrate how mass warpes spacetime, notice that the surface of the trampoline increases. Just saying....
I heard nothing in the first 20 seconds.
All I knew was cat.
That cat has some serious floof!
Regarding shipping humans past LEO: It's not worth even going to the moon unless the plan is mapped out to a point where earth could quit supporting the colony without the colony having any concerns about their long term, many generational, survival.
You could presumably build, launch, land and operate a few dozen Curiosity/Perseverance type rovers for years for what it would take to put a less than dozen humans in one location for less than a year.
for going past the moon, definitely.
Lunar resources are much more fuel efficient for doing anything large scale in low earth orbit than lifting metal, water, and propellant from earth, so that's one reasonable economic case that could support importing difficult-to-manufacture durable goods long term since it's not actually that far.
There's also a decent chance of finding easy-to-access rare earth deposits on the lunar surface that you could mine very simply and that's high value enough to consider shipping back to earth, though I admit that one is a little more out there, and depends a lot on the difficulty of setting up or restarting viable mines on earth that don't poison the water table.
@@thamiordragonheart8682 even for lunar mining, I'd question if it's cheaper to ship humans or robots. Other than dealing with equipment breakage and the like, I don't see anything humans would be doing that wouldn't be remotely operated, even if the operator is only in a pressurized rover 10m away.
Omigosh your kitty in the background is being too cuuuute! ^^ Perseids is my favorite meteor shower too, but I'm still so sad the moon is gonna outshine the Geminids shower :( Not like I can see it well regardless since I live in the city. Thank you Dr. Becky as always for putting in the time and energy and knowledge into these videos! I always look forward to your posts! This one about dark energy being coupled with black holes was a bit dizzying but still fascinating. I need to rewatch though I think to fully absorb lol
So, from what I remember about Gaussian surfaces is that they can be used to explain the inverse-square law, the one we use to describe gravitation in our solar system, within galaxies, and between galaxies. These surfaces are also used to mathematically describe magnetic fields. As I recall from E & M which I took many decades ago, magnetic materials (not just magnetized ones) can affect the shape of magnetic fields. What if massive objects affected gravitational fields analogously? I mean, what if they did it in a way that was subtly different than the one Einstein's general relativity describes? How can we be certain that a massive object in the gravitaional field of another object does not affect the field in a way that is analogous to magnetic materials in magnetic fields? So, for example, lots of stars in a galaxy could change the gravitational "permeability" of space, flatten the Gaussian surface perpendicular to the field lines, and cause gravitational acceleration to decrease at an amount different from the inverse square law. I wonder, do small galaxies seem to have more missing mass, or large ones? If it's the latter, then I think this might be a helpful idea to contemplate.
Jupiter has been so bright lately! Blows my mind every year
Sorry Dr. Becky, I didn’t get what you said. I was watching the cat.
The more I learn about physics the more I think dark matter, dark energy, primordial black holes, etc are all as likely as Santa Clause being real.
Nice cat
I was thinking earlier today that Jupiter was looking particularly bright, I guess that's why
Cat appears to be trying to alert you to a problem with the displayed data?
If black-holes grow from vacuum energy, what effect does that have on excluding primordial black-holes based on the missing observations of them evaporating?
Astrophysical research will not suffer as big cuts as climate one. The Orange One and his disciples do not like the results of climate research in general. So I am very deeply concerned about the American satellite observation systems. Of course they serve both climate research and weather observation so the main victims will be people not warned about a hurricane because circulation models will lack good data. It is so predictable and the therefore so sad.
That's total speculation based on imaginary nonsense.
@@OhAncientOne It's based on his previous term. And then he had some adults in the administration, at least in the first three years.
@@OhAncientOne Project 2025 explicitly targets NOAA and the NWS.
@@OhAncientOne You seem to be totally departed from reality.
@arctic_haze While you are right that there's people who don't want the climate satellite's,
even if there are cutbacks, in no way will that affect hurricane weather forecasting.
But, for several years now I thought those people aren't very sharp.
They should be 100% behind getting as much real data as possible, I am.
Trump, Elon, Vivek and team, are going to create a
"Golden" era and unlike the Democrats, he knows how to do it. Starting with people who are actually competent.
Nice to see your co host is back with you this week. Love cat she can come any time has long has you can do the show. Have a good week.
SPONSERS note! When AstroCat is in the background, I DO NOT fast forward throught your information! Thank you! 🥰
We can depend on Elon Musk discovering "hyper space worm holes" which can reverse the laws of thermodynamics and make fairytales come true.
I love Night Sky News! Thanks Dr. Becky!
Why should only black holes couple to dark energy - instead of general concentrations of matter doing the coupling? As the universe ages, matter concentrates ever tighter into the cosmic web, galaxies, and all sorts of compact objects (not just black holes) - and all these mass concentrations pull on spacetime too. Then perhaps that locally stressed spacetime causes expansion of the surrounding relatively less-massive large voids and general intergalactic space, in some kind of a direct feedback?
Wouldn't primordial black holes have (very small) accretion disks? If so, what would that look like to an observer?
I think the better answer is, our understanding of the universe is fundamentally wrong. :)
Cats, because you're tired of having nice things.
Okay Canadian here when you mention cold, but your in Britain right? Does Brittan even get snow there?
i have a british friend who sent me a pic of snow covering the ground... we didnt even have any snow yet here in eastern canada, heck we havent had a white christmas in years
Dr. Kathy, a question for you: Could you do a breakdown of the (now not especially new) updates to the black hole photos which have the magnetic field lines superimposed over them? I am hoping to learn things like the following: 1) Whether the resulting superimposed image is in any way representative of what a person would see in reality if they could glean that much detail, or if it is dramatically exaggerated, 2) The exact nature of the start and stop points which many of the lines exhibit upon close inspection-these look particularly non-true-to-life and suggest the entire work is in large part artistic interpretation cobbled in Photoshop. Magnetic field lines do not start and stop with complete abruptness like that.
How cool would it be if it turns out there is a equivalence relationship between energy and spacetime, and black holes are converting energy directly into spacetime. We'd literally be made out of the fabric of the universe itself.
There is no such relationship.
Thank You, Dr Becky
don't worry about hubble..the budget will be $0 next year.
OMG!!! We have the same cat!!!???
Great video as always Dr Becky! Always enjoy your videos and learn a great deal. Cheers from USA, 5/5!
I’m glad you have a classical 🐈.
Background cat!
What's the difference between dark energy and negative mass
I’m not sure who the star of this channel is anymore, Dr Becky or her beautiful cat 😅
When we start seeing those DART meteors, I wonder if we'll call them the "Anthropids"
What about JWST destroying dark matter?
What about fake news? It's as old as hearsay.
Did you see latest Hossenfelder video, she said latest webb's data result shows there is no dark matter helping built the first big galaxies, they should not exist. So wether the age of the universe is wrong or there is no dark matter .)
Sabine has had some really bad takes recently. She's also strongly against dark matter so her conclusions are kinda biased
Hopefully Elon Mucus will send himself to Mars.
😭…..😂😂😂😂
Dr. Becky. Wishing you and cat and kin and kind, all the best this holiday season. Its about this time of year that I usually fall into an infinite black hole so I know they do exist. Thanks for all your great postings of knowledge expanding videos...
That music makes me think of my favorite obstetrician.
Dr. Becky, if Hawking was correct about black holes slowly, or fast, evaporating, why would you expect some kind of high energy release when the black hole disappears? Does his theory show the black hole going out with a bang or a whimper-just fading away into "space"? If it goes out with a bang I would expect there to be indications of that as the black hole was shrinking when we ever find one to observe.
Hmm "Could black holes explain dark energy AND the crisis in cosmology", maybe explain a small part of it! but we need to change our model as JWST keep's showing us some thing's are a lot bigger then what we think we should be seeing for example the super massive galaxy's in the early universe or super massive black hole's that break all of our predicted outcome's? but confirms predictions made with Modified Newtonian Dynamics, MOND.
18:15 I am slightly distracted by your fabulous hair: especially when it switches sides between cuts… - the asymmetrical version is especially drawing my looks. 😊
This was such a good episode, I just love the little things you can learn and yes much is often beyond me but that doesn't detract in any way from my enjoyment Thanks a Lot.
We need to make a second JWST, as well as the replacement to Hubble.
Please do a video on Quantized Inertia...since you did one on MOND, I think it would be great content. Thanks!
Next episode cat solves problem no one can figure out. HAHAHA
9 times over allocated time on JWST
Or there's studies that overlap and want to study the same object. So they've allocated 9x studies that have similar observations.
You don't need a telescope to see my Big Dipper.
The biggest downside of moving to Vienna to study chemistry is i cant see the stars anymore just by looking out the window xD
In ‘A Brief History of Black Holes’ you offer that Taylor Swift is the greatest lyricist of our generation. Awesome, but I just want to say, what about Lorde?! Have you listened to Lorde??
Great work as always. Love your videos and your book.
dang i havent listened to lorde in ten years, now i gotta go back to them... have they released any banger after queen bee?
No blooper of Dr. Becky singing Under Pressure?
I'm confused about pictures showing black holes. I think of it as a black ball with the event horizon formed as a donut shap of mass rotatiog around it. Like😮 the rings around Saturn . But when people try to represent the donut from different angles, part or the donut is squashed out to one side. Like the donut has a fat area or the donut is not all in the same plane. I hope this makes some sense. Can you explain why they look like this? Thanks, MIke
Not if there aren't many in intergalactic space ..naked black holes. That's a unique possibility especially if they are primordial.
For some reason vacuum energy reminds me of perpetual motion. So rather than claiming that aliens built anything we don’t fully understand, I think we need to continue studying the universe. We have barely started learning about the universe. Just like 150 years ago we thought we had it all figured out and the only thing to do was add a few more decimal places to our knowledge.
Is there a point where the study of black holes reaches a limit since we can never truly know what's inside them? It feels like an insurmountable problem, as the best we can achieve are mathematical inferences about what might be happening. On top of that, we have dark matter and dark energy-phenomena we can't directly see or detect-and black holes, where we can't say with absolute certainty what's going on internally. How do you maintain your sanity while studying such elusive mysteries?
thanks Doc
Being able to detect asteroid-sized primordial black holes should be good. The less massive a black hole, the sooner it evaporates and based on the life of the universe primordial black holes should have a minimum size in order for them to not have evaporated. From memory (and I might be mistaken) the asteroid-size mass is the biggest spot left where we haven't yet ruled out the existence of primordial black holes.
We should also not forget that it is entirely possible that there are more than one single solution to dark matter; it can be a mix of various solutions. And even if it doesn't solve dark matter, it would still be nice to know or to rule out primordial black holes of various sizes.
I need just a slightly deeper dive into why black holes gaining energy and mass explains why the expansion of spacetime is speeding up.
I think there's a PBS Spacetime episode on it.
Maybe the cat wants to go to Mars.🤔
So.. you're saying in a universe that creates matter in a void from radiant energy, then said matter falls into a black hole, which takes said matter, and converts it into dark energy, which grows space, so it would create more void, so more matter creation... sounds like a cyclical thing like we see all around in the universe :D But that also alludes to an eternal and eternally growing universe :D
Night Sky News....
"WoW!"👍🖐
You inspire me to study more for my dreams, thank you 🪐🌌✨️
My first question on the black holes growth coupled to dark energy idea: what the mechanism of this coupling is (if it exists)? second: what prediction can be made to definitively test the idea?
Such a chonky tail
I am not a physicist or a scientist of any sort. I have no particular right to or reason for the following position. But I’ve long suspected that black holes were somehow involved in the expansion of the universe. I also suspect that time is not being accounted for properly in the way we think about black holes and gravity. But someone much smarter than I am will have to figure that out
Can you do a video on two similar proposals for telescope time and why one was approved and the other not? I’m curious about how the decision is made if two different groups want to study the same thing. Also, I’m pretty sure a primordial black hole caused the tripod to wobble and not Pippin. Pip is innocent.
I'm cosmologically coupled to tacos.
I wondered what it light itself could be dark energy
Could the super giant black holes at the center of galaxies be the primordial black holes? That would help explain how massive they are without enough time to grow that massive
I'm having so much fun watching while actual scientists figure out if the expansion/structure problem is a case of spherical cows everywhere or something deeper. Keep looking up!
Re measuring the distance to Mars to detect primordial black-holes: I wonder if that could be combined with a dedicated communication platforms at Mars? A platform to allow high bandwidth data return from Mars would have lot of the equipment needed to do high precision range and rate measurements.
At @23:30 you say something that is confusing me every time I hear it. If the red-shifts of very far galaxies were larger than anticipated from the extrapolation of the red-shifts of near galaxies, then that additional red-shift would be the result of a higher expansion rate of the universe in the past, and thus the expansion rate of the universe would have to be slowing down. In order to conclude that the expansion of the universe is accelerating, the evidence must be that the red-shifts of far away galaxies are actually smaller than anticipated. I seem to remember that the original data actually supports my logic, but I don't remember which source I checked.
the hubble not-so-constant
Could you please talk about the point that Dr Sabine Hossenfelder made on her video; Webb Falsified Dark Matter Prediction
Could you please provide title and author of the paper you are talking about? I don't watch her videos anymore.
It's her most recent video and she lists the paper in the description
Yes to this!
lol cancelled for some reason?
I’d bet the banks that’s not gonna happen bc Dr B is dogmatic towards the mainstream and academia theories/beliefs, she may get less funding or less views so she won’t even touch it just like the ufo phenomenon. It’s a sad science world by 2024, ots hardly actually science with the amount of dogma and suppression/rejection of science they don’t agree or comfort with.
It is my understanding that the team who is granted time on the JWST has dibs on the data from the instrument they requested, but what about the other instruments? I assume the other instruments still observe adjacent patches of sky; is that data available to anyone or is it also exclusive to the original requestors?
Cat spotted! ❤