I don’t usually make these types of comments, but your grasp of the subject matter and the ease with which you explain this is phenomenal. Even as a layperson I feel like I finally grasp the core of something that most other science communicators only skirt around. You have the potential to become the 3blue1brown of cosmology!
Whilst I don't really understand the maths behind Lamda-CDM, your demonstration of how varying the input parameters broke the best fit curve from the CMB data made intuitive sense. Thanks.
28:44 : could you plot the residuals of this model? I think it would be interesting to see It looks to me as if most of the data points are a little bit above the best fit line? But maybe the ones below the best-fit version of the model are just more tightly bunched so I don’t notice them as much? If so, I sorta wonder why the residuals are distributed in such an asymmetric way? Edit: by “best fit line” I mean “the curve predicted by the model, when the parameters of the model are chosen (as in the video) to best fit the data”. Also, this is a very nice video.
To be honest, I don't know enough about the data analysis to give a qualified answer. I can only refer to the paper I cited in the comments, where they perform the best fit evaluation. I also think that it is a highly elaborate task.
Good video thank you for sharing. Keep up the good work. Is the speed of sound back then half the speed of light from time dilation factor? Where is the epoc of neutrinos ( CNB Cosmic neutrino background ) Ah you got it nevermind. Good job
It's a "realtime" speed of sound. It's very sensitive to the proton density. It's that high because there are a billion more photons than baryons. Photons dominate the plasma.
@@Number_Cruncher Whats the difference ultimately? Stellar Novae make new stars. It's like saying this isn't a human nursery, it's just the place where human mothers give birth.
Well, I was thinking about Mesopotamia, which is dated between 6000 and 1500 BC, as well as the Ancient Egypt, whose early period is dated around 3000 BC. I think, I have worse glitches than that in my introduction.
From nuclear physics we know that there is also the quantum number "spin" (additionally to " n, m, l") that contributes to the spherical harmonics. Is there an analogous such entity also for cosmology?
Actually the spin quantum number does not arise from the Laplace operator. It has its origin from the transformation properties of the particle's wave function with respect to rotations or more generically Lorentz transformations. Therefore it is not connected to the spherical harmonics.
3 snapshots we can potentially see: immediately after the big bang, 1 second after the big bang, and 378000 years after the big bang. The second and third of that is larger jump geometrically than the current age of the universe vs the age where recombination happened. I've a feeling it's going to be really hard to piece the story together even if we map out the background neutrino.
I'm not sure. From 1 second to 378000 years all perturbations will be tiny and completely controlled by linear evolution. When the background and the high energy physics is under control, it should be possible to understand. But I agree in principle, there can be a few surprises, phase transitions, etc
@Cyber_Nomad you probably need at least two big ones, if you want to get some angular resolution (get an idea where the signal comes from). I have no idea about the scale of sophistication. But it's already cool to know that the information is out there and maybe we will be able to know at some point in the future 😉
@drdca8263 ohhh.... the Newtonians and einsteinians are fools dude. Sure in the west they larp like they have it all figured out... but it's just science fiction written with numerology lol Gravity isn't even massbased and spacetime is the aether rebranded with rubber sheet geometry lol
That's strange math. The polar star is 433 light years away. The inhabitants there would have seen us in the year 1591. Genghis Khan died in 1227. That means he'd have been dead for more than 350 years.
Yeah, elementary math is the hardest part. I don't know, where I got the distance of 800 ly from. That's what I was calculating with. But I see there is some debate about the distance and wiki says 433 ly. And afterall, what's a few centuries in comparison to the age of the universe:-)
![Seungmin "그렇게, 천천히, 우리(As we are)" | [Stray Kids : SKZ-PLAYER]](http://i.ytimg.com/vi/kAzmhLHePqU/mqdefault.jpg)
This is one of the best physics videos I've seen. Really fascinating stuff, and not dumbed down.
I don’t usually make these types of comments, but your grasp of the subject matter and the ease with which you explain this is phenomenal.
Even as a layperson I feel like I finally grasp the core of something that most other science communicators only skirt around. You have the potential to become the 3blue1brown of cosmology!
Thank you. I really appreciate it.
I agree and I think you should support this creator but you also might like PBS Space Time
Vielen Dank für das tolle Video!
Whilst I don't really understand the maths behind Lamda-CDM, your demonstration of how varying the input parameters broke the best fit curve from the CMB data made intuitive sense. Thanks.
The only unpleasant part of this story is that 95 percent of the content of the universe is dark, or in other words not really understood😉
*star sizes vastly exaggerated
That's true. I was worried that I would loose them during video compression.
Clearly a visual representation. Don’t be daft
This is peak.
Wow, very beautiful and amazing.
Thank you, for some reason, your comment was blocked. That's why I only found it now.
Simply, amazing.
really nice video
Exceptional work, sir!
Illuminating video ✨
Thanks!
The first Super-thanks I've ever received. I'm flattered:-)
Mind blowing.
28:44 : could you plot the residuals of this model? I think it would be interesting to see
It looks to me as if most of the data points are a little bit above the best fit line? But maybe the ones below the best-fit version of the model are just more tightly bunched so I don’t notice them as much?
If so, I sorta wonder why the residuals are distributed in such an asymmetric way?
Edit: by “best fit line” I mean “the curve predicted by the model, when the parameters of the model are chosen (as in the video) to best fit the data”.
Also, this is a very nice video.
To be honest, I don't know enough about the data analysis to give a qualified answer. I can only refer to the paper I cited in the comments, where they perform the best fit evaluation. I also think that it is a highly elaborate task.
2 mins in and damn🔥
Thank you.
Nifty AF!
Really good video!
Good video thank you for sharing. Keep up the good work. Is the speed of sound back then half the speed of light from time dilation factor? Where is the epoc of neutrinos ( CNB Cosmic neutrino background ) Ah you got it nevermind. Good job
It's a "realtime" speed of sound. It's very sensitive to the proton density. It's that high because there are a billion more photons than baryons. Photons dominate the plasma.
Really nice presentation, thanks! I was wondering about the music at the start and end: is it by Arvo Pärt?
I took the music from the RUclips library. The piece is called Requiem No. 8.
ruclips.net/video/DLQZelThXgQ/видео.html
@ Thanks!
классное видео great video
Pretty sure the crab nebula is not a stellar nursery but a supernove remnant, but otherwise the video is superb and very clear
Yes that's right. I got this wrong unfortunately. Thank you for clarifying this.
@@Number_Cruncher Whats the difference ultimately? Stellar Novae make new stars. It's like saying this isn't a human nursery, it's just the place where human mothers give birth.
Also pretty sure humans didn’t first settle in Africa and Asia 6,500 years ago.
Well, I was thinking about Mesopotamia, which is dated between 6000 and 1500 BC, as well as the Ancient Egypt, whose early period is dated around 3000 BC. I think, I have worse glitches than that in my introduction.
From nuclear physics we know that there is also the quantum number "spin" (additionally to " n, m, l") that contributes to the spherical harmonics. Is there an analogous such entity also for cosmology?
Actually the spin quantum number does not arise from the Laplace operator. It has its origin from the transformation properties of the particle's wave function with respect to rotations or more generically Lorentz transformations. Therefore it is not connected to the spherical harmonics.
3 snapshots we can potentially see: immediately after the big bang, 1 second after the big bang, and 378000 years after the big bang. The second and third of that is larger jump geometrically than the current age of the universe vs the age where recombination happened. I've a feeling it's going to be really hard to piece the story together even if we map out the background neutrino.
I'm not sure. From 1 second to 378000 years all perturbations will be tiny and completely controlled by linear evolution. When the background and the high energy physics is under control, it should be possible to understand. But I agree in principle, there can be a few surprises, phase transitions, etc
What about gravitational wave background ? I know it will require enormous size of interferometer, but in space it can be made
@Cyber_Nomad you probably need at least two big ones, if you want to get some angular resolution (get an idea where the signal comes from). I have no idea about the scale of sophistication. But it's already cool to know that the information is out there and maybe we will be able to know at some point in the future 😉
COMMENT FOR THE ALGHORITHMm
@Number_Cruncher extra comment for the RUclips algorithm so that it can see that this is a nice video and recommend it to other
@@elia0162 ASTRONOMERS ASSEMBLE!!!!
COMING IN HOT WITH COMMENTS AND REPLIES!
ASTRONOMERS ASSEMBLE!!!!
(Preferably not the ones from the Einsteinian or Newtonian Metaphysics paradigm.... those guys are INSANE!)
Wut?
@drdca8263 ohhh.... the Newtonians and einsteinians are fools dude.
Sure in the west they larp like they have it all figured out... but it's just science fiction written with numerology lol
Gravity isn't even massbased and spacetime is the aether rebranded with rubber sheet geometry lol
Hey NC, I’d like to speak with you about something regarding this video.
What’s your email?
physik.martinATgmail.com
That's strange math. The polar star is 433 light years away. The inhabitants there would have seen us in the year 1591. Genghis Khan died in 1227. That means he'd have been dead for more than 350 years.
Yeah, elementary math is the hardest part. I don't know, where I got the distance of 800 ly from. That's what I was calculating with. But I see there is some debate about the distance and wiki says 433 ly.
And afterall, what's a few centuries in comparison to the age of the universe:-)
Is this just common knowledge for physicists??? Insane applications of mathematics to the early universe
@@Meewee466 I guess, it's not part of the standard program, but at a lot of physics departments you can take courses on astrophysics or cosmology.