Hahaha. For sure. I somehow thought that dreads that form through letting your hair be crusty and gross with no care whatsoever was a good look. I should go back and thank the person who ended up giving me lice, forcing me to cut off those abominations.
I love how science scaffolds on itself. Someone was researching the spin of stars wondering what could be gleaned from that and that eventually led to the calculations of the Milky Way's age. Awesome stuff!
Gotta say thanks for such cool information all the time! Your videos helped me pick an awesome galaxy for my science presentation, and helped me get an awesome grade on it :)
The amount of work put in each of your videos is incredible. I have watched this one like 10 times because it is a very good summary and I did not want to miss any details. My research is on estimating the ages of globular clusters so I found your video very helpful.
I recently started my kids on home school and we do a class on astronomy and we use your videos. We watch them and I have a short test for them at the end and they love it. They are so mesmerized and at the same time perplexed at the size of the galaxy. Thank you for what you do
I can recommend SciShow and CrashCourse videos too, many teachers use them in their classes! (There’s also a separate SciShow Kids channel you might like, depending on the ages of your kids!) Much love
Anton Petrov is amazing too! And 3D size comparisons are insane! I prefer the longer ones and definitely newish ones.... More than a few months old is just ancient in my opinion. Have a good day and keep on learnin'!! 🍻🌎❤️🚀🤯
Thanks Dr. Becky! As a current astronomy student these videos are a lot more informative and realistic as opposed to the media’s out of context headlines. I appreciate your work. I’m getting into the coding aspects of the kind of work astronomers/astrophysicists do.
@@DrBecky It is hard to believe that the Wealthy are wasting money on stuff like those you talk about instead of focusing on organising a prosperous society.
"Because science says so" is used when an explanation would require someone to spend hours, days, or even weeks just to bring your knowledge level up enough to understand the basics of the topic. These kinds of videos let you see a glimpse of the topic and make you feel like you understand it, but the truth is that you just learn more details about the topic without actually understanding it. That's why universities exist: to allow you to study a field until you properly understand it.
I love theese vidoes for the exact same reason. We can have an idea how the data looks and also how much effort is behind a simple claim that our Galaxy is 13 bn years old. Other channels usually provide just visualisations, and yes, the visualisation are nice and helpful, but I would also like to see how the data looks.
Thank you for another and enjoyable video. I especially appreciated your presentation of a HR Diagram. I found it more visually pleasingcand informative than others ive seen in textbooks.
Thanks for being one of the channels I use to find out the actual space news behind the headline daftness I'm wandering how much of The James Webb's targets are suggested from Gaia data (or other intereractions between the two projects) if that would be a useful topic for your channel
3:30 and if you put a wall of certain materials between you and the ambulance, sound gets altered in different ways also. kinda like the light that goes through different materials as well :)
Ah, HD 140283. That was the subject of the first video I ever saw by you. Almost two years later and I'm still here watching your videos every week. Here's to the next two and beyond. 😀
Thanks for another clear, concise explanation of important discoveries! Wrapping my head around all that the Gaia recording leads to is not easy. I imagine the sheer, raw data it's collected has to be staggering. Then, very bright people reach into that data set to find so much useful information. Thrilling stuff!
0:21 - Baby Dr. Becky! ;-) And those star animations at 1:37 and 2:15! Thanks for the great work and explanation for all of this, Dr. Becky. Much appreciated!
excellent video, Dr B! of course, they all are! loved your most recent book, too! now, i need to read the other one. thanks and.......Happy St Pat's Day😃👍
Dear Becky - Excellent Video with great visual and excellent explanations, very well done. Please keep up the good work. I like how you explained about the Gaia mission and how crucial it is, however you missed to mention the LAMOST spectroscopic survey. The Xiang&Rix 2022 study relies on spectroscopic data from the LAMOST survey - the stellar parameter, radial velocities and the chemical abundances come from these spectra, without which accurate ages and this kind of study is not possible.
Sooo, the word "bigger." Would you possibly think about using either more massive or having more or less volume (voluminous?) when describing stars. I teach physics and astronomy and I've run into this misinterpretation too many times, because I, too, inadvertently use the word bigger. Your videos are wonderful, many of my students watch them. It goes without saying (but I'm going to say it anyway), I never miss one, I enjoy them, so much. Thank you.
That was super informative, thank you! It's weird, a friend of the family was asking only 2 days ago about how do we work out the age of the stars and galaxies... i'll send her this way!
The switch between two versions of fusion. From what’s known as the CNO cycle (stars heavier than the Sun) to the proton-proton chain (stars less massive than the Sun)
Brilliant ! You have just about encompassed the theories of everything in your interesting explanation. So determining the age of our galaxy has not at all been a simple task though challenging and knowledgeably rewarding.
Becky, a general question. 1: do 'we' know if the strength of space-time is the same everywhere? I can imagine it being weaker where it gets stretched? 2: Do I get this right? Lightspeed is a constant, but as space gets stretched by mass (x speed?), light has to travel a longer distance through that stretched space, which logically takes more time?
Hi Doctor Becky. Enjoy your content and it answers many of my questions. If I had a few more in-depth ones, could you recommend a resource for communicating one-on-one with an astrophysicist/cosmologist?
I love these videos when you explain how the scientists got to a certain discovery. We can have an idea how the data looks and also how much effort is behind a simple claim that our Galaxy is 13 bn years old. Other channels usually provide just visualisations, and yes, the visualisation are nice and helpful, but I would also like to see how the data looks.
I really enjoy videos like this; videos that explain how certain measurements of celestial bodies are measured. I hope information like this gains more virality.
I think becky is related to Jay Leno on some blood line or something! You should check into that. You were such a cute kid! She has so much style and confidence!
I remember reading something on stars a long while back on something called black dwarf stars. The idea was that star start out as yellow giant expand into a red giant eventually collapse into a white dwarf which at this point is basically a small very dense piece of rock slowly cooling over millions of years Like a hot piece of cooal taken out of a fire. The part that interested me was it's estimated to take so many billions of years of for a star to go through it's yellow red white and eventually black phases that it'd be more time than the universe has actually existed for.
You're the best astrophysicist I've ever known, yet have never met. That's a strange paradox. Eh, I still appreciate everything you do for your audience. This was a great topic. Thank you for tackling subject matter like this. Cheers, Dr. Becky. Oh, and what did we learn today? Methods used to measure the age of our galaxy, but more importantly, Dr. Becky is a Swiftie. I'd glitter up and go to the concert with ya. It looks fun.
Hi Prof. Dr. Becky ! Which desktop/laptop cosmology or Astrophysics applications is best for learning computational Astrophysics or Cosmology for programming?
How close to the limit of what can be done from an earth bound perspective is Gaia operating? How much better would the data be if it could be pulled from a much longer baseline (say >10AU) and much closer to simultaneously (i.e. multiple spacecraft taking the pictures of the same patch of sky)?
Interesting way of touching on the use of H-R diagrams in deducing the age of a group of stars. If I understood it correctly, the lower left hand corner of the diagram is initially populated by fast-dying stars, they blow up and then their elements form main sequence stars, and these in turn blow up and their matter make up stars in the upper right quadrant, e.g. subgiant, red giant, or super giants. A very pedagogical explanation to be sure.
So cool that Gaia caught Webb out there. :) I'm thinking about making a spectroscope of my own. Using an old cheap refractor and a prism, with a camera attached. Not sure how to pull it off yet though.
Thank you for another enlightening video. You often talk about Gaia taking stellar spectra and even show samples, but does Gaia have a list showing spectral types? Like star X = G2 v, or A6 i. I keep looking and I can't find any so I continue depending on Simbad for such info. If gaia does have such a list, how do I access it? Thank you.
Dr. Becky, have you seen the strange object(?) in the latest JSWT images? It's at the very top of the composite image and about 1/4 of the way across the image starting at the left. Would be curious to see what you think it is. Cheers!
First off, great video as always. The simulation in the first minute of the video shows what looks like explosions or bullet trails that do not seem to be directly related to mergers. Is that just an artifact of the simulation, or is there a cause for these outbursts? Are they just delayed results of bursts of star formation due to mergers?
Nobody knows how old it is. It’s merely impossible to tell. They think they know but all they can tell is about how old plus or minus a few billion years.
Great video, I really needed to learn this and you nailed it (as usual). However, I know this isn't essential to the story that is told, but the illustrative animation at 3:12-3:27 doesn't show the right movement of the spectrum. For example, when the star is at its furthermost position it shifts from moving away to moving towards us, and thus the spectrum wouldn't be moving at that moment, rather it would change direction. (I'm also extremely funny at parties 🙂)
Random Blackhole question: I have heard that if you were to watch a person fall into a black hole. The observer outside the black hole would see the person slowing down as they approached the event horizon, eventually seeming to be frozen at the event horizon. If the black hole is spinning, would the observer see that frozen image of the person remain stationary? Would the image of the person appear to spin or orbit the black hole due to frame dragging? The event horizon is not a solid surface, so it shouldn’t spin with the black hole, but it is hard to imagine that the last image of the person falling through the event horizon wouldn’t move.
@@leave-a-comment-at-the-door when she first published the video there was a spelling error in the title. She later corrected it but I wondered if she should add it to the blooper reel at the end.
Thank you so much for all your content. I learn so much from every video. You may have answered somewhere else. Do we know if our star was formed in the Milky Way or the Sagittarius dwarf galaxy as I have heard suggested?
Hmm, measuring the wavelength of light through color differential adjustments may also help determine time over distance. Yeah um size of a sun "taps chin with head tilted sideways". Surprises me that they don't use other filters pertaining to other subjects that like to overlap.
Thanks Dr. Becky! Is there any problem with using a unit (the year) for measuring the age of something that existed an enormous amount of time before our earth and sun ever existed?
not a comment....just a question....from what you're saying it seems there is a pulsating effect of stars from the beginning of time that are born..live ..and explode...and that material eventually from all the other exploding stars regather all the available hydrogen, thru gravity, to form again new stars to continue the cycle again and so on and so on. ......Another thought is that all the heavier elements from exploding stars some how find their way around another star's gravity eventually to form planets or the like...if that be the case, then most stars in the universe have planets circling around them at various distances....which leads me to believe how very unique Earth and our solar system is! Another thought...where did the first hydrogen come from? Was there only a set amount of hydrogen in order for the "big bang" to happen?
Greetings, I am a physics hons undergraduate student in first year and wanna pursue career in Cosmology. May you please make a detail video on how to obtain data(like data u use in video) and how to understand the data too...
Given that we can’t model magnetic affects, is it possible we are significantly off what we know? Ie how much of an effect do we think magnetic fields come into play?
Once you get down to single digits of solar masses, the stars won't go supernova on their own(*), but instead form white dwarfs. (*)Unless something dumps stuff on the white dwarf later on to cause a Type Ia supernova.
@@stargazer5784 I've read of a bit of a range for that cutoff -- maybe the exact cutoff depends upon initial composition and resulting rate of mass loss?
What's Your Opinion on Halton Arp's theory on the electric universe, it disproves the big bang cosmological model. He explains it with the anomalous redshift of quasar Markarian 205 which was further away from the NGC 4319 galaxy. It had the bridge between the NGC 4319 and the Markarian 205 in the neutral hydrogen wavelength(21cm).so how can it have a bridge when it's 14x further away from the NGC 4319 and is there any conclusion on this topic?
White dwarfs are a way to measure the age of the galaxy (right?). I'm working with the IFMR with a star cluster and models have the cooling age for white dwarfs and using the IFMR you can get the progenitor mass and time before it reached the WD phase.
Dear Dr Becky, Can you give a different explanation for Doppler shift,the analogy with an ambulance siren is just that, an analogy. Sound waves are a mechanical thing, light etc. is an electromagnetic thing and the two are not to be confused. Presumably, as the wavelength alters then the energy level of the Doppler shifted photon alters. For me, this is a puzzle!
To summarise, we can age astrophysicists by looking at their baby pictures (awwww), while we age stars in galaxies by looking at their retirement party pictures (awwwwww).
Dear Becky - this is one of your very best! Those H-R animations are fantastic; so much is now explained. Thank you!
Space is hard... boys are harder. It's all relative Bec
Anyone with the courage to integrate photos of what they looked like as a teenager deserves a massive following. #blackholefan
Hahaha. For sure. I somehow thought that dreads that form through letting your hair be crusty and gross with no care whatsoever was a good look. I should go back and thank the person who ended up giving me lice, forcing me to cut off those abominations.
The images were just brief enough that it's not completely terrifying.
I love this channel. Dr. Becky has infectious enthusiasm.
9:23
Reminds me of Sheldon from the BBT "singing" star names hopping down the stairs.
I love how science scaffolds on itself. Someone was researching the spin of stars wondering what could be gleaned from that and that eventually led to the calculations of the Milky Way's age. Awesome stuff!
Best explanation I've seen. Can't wait for the book to arrive next week. Looking forward... and upward.
Gotta say thanks for such cool information all the time! Your videos helped me pick an awesome galaxy for my science presentation, and helped me get an awesome grade on it :)
The amount of work put in each of your videos is incredible. I have watched this one like 10 times because it is a very good summary and I did not want to miss any details. My research is on estimating the ages of globular clusters so I found your video very helpful.
I recently started my kids on home school and we do a class on astronomy and we use your videos. We watch them and I have a short test for them at the end and they love it. They are so mesmerized and at the same time perplexed at the size of the galaxy. Thank you for what you do
I can recommend SciShow and CrashCourse videos too, many teachers use them in their classes! (There’s also a separate SciShow Kids channel you might like, depending on the ages of your kids!) Much love
Anton Petrov is amazing too! And 3D size comparisons are insane! I prefer the longer ones and definitely newish ones.... More than a few months old is just ancient in my opinion. Have a good day and keep on learnin'!! 🍻🌎❤️🚀🤯
@@juliaspoonie3627
I wouldn't use SciShow, though. Especially not for teaching, considering how often they are simply wrong.
@@juliaspoonie3627 nooo not scishow
I agree with Melvyn Davis -- this was one of the best presentations of significant astronomical research I've ever seen. Great job, Becky.
Always been a big fan of hold old. Brings a tear to my eye every time
I've personally become the worst speller. I was once quite good like in high school.
@@mdb1239 that's a great story
@@mdb1239 I was crap at spelling in high school and have only gotten worse.
@@LeftCoastStephen I loved it. It made me laugh.
@@mdb1239 I'm the best speller ever, I can spell any word hundreds of different ways
Thanks Dr. Becky! As a current astronomy student these videos are a lot more informative and realistic as opposed to the media’s out of context headlines. I appreciate your work. I’m getting into the coding aspects of the kind of work astronomers/astrophysicists do.
You’re very welcome! All the best with your studies 🥳
@@DrBecky It is hard to believe that the Wealthy are wasting money on stuff like those you talk about instead of focusing on organising a prosperous society.
I love these types of videos that give us laymen better explanations than "because science says so".
You are not a layman.
I feel that the reason that she went into such an in-depth explanation was that this study was done pretty recently.
"Because science says so" is used when an explanation would require someone to spend hours, days, or even weeks just to bring your knowledge level up enough to understand the basics of the topic. These kinds of videos let you see a glimpse of the topic and make you feel like you understand it, but the truth is that you just learn more details about the topic without actually understanding it. That's why universities exist: to allow you to study a field until you properly understand it.
I love theese vidoes for the exact same reason. We can have an idea how the data looks and also how much effort is behind a simple claim that our Galaxy is 13 bn years old. Other channels usually provide just visualisations, and yes, the visualisation are nice and helpful, but I would also like to see how the data looks.
Trust me, astrophysicists _really_ appreciate them as well :)
Thank you for another and enjoyable video. I especially appreciated your presentation of a HR Diagram. I found it more visually pleasingcand informative than others ive seen in textbooks.
Thanks for being one of the channels I use to find out the actual space news behind the headline daftness
I'm wandering how much of The James Webb's targets are suggested from Gaia data (or other intereractions between the two projects) if that would be a useful topic for your channel
3:30 and if you put a wall of certain materials between you and the ambulance, sound gets altered in different ways also.
kinda like the light that goes through different materials as well :)
Thanks! Those links to the appropriate papers are cool. Useful while reviewing & replaying this lecture.
It was nice to hear and see you again.
Ah, HD 140283. That was the subject of the first video I ever saw by you. Almost two years later and I'm still here watching your videos every week. Here's to the next two and beyond. 😀
"Space is hard, words are harder"
I like that quote
Kudos! Eminently clear. Thank you.
Thanks for another clear, concise explanation of important discoveries! Wrapping my head around all that the Gaia recording leads to is not easy. I imagine the sheer, raw data it's collected has to be staggering. Then, very bright people reach into that data set to find so much useful information. Thrilling stuff!
Thank you Dr. Fantastic description and intuitive breakt. You continue to inform me in ways I understand. Cheers. ❤
My brain put a period after fantastic
The rest of the sentence made no sense. I had to reread it to make sense
But I'd say she is Doctor Fantastic.
@@christianheichel 😂 that does change it. I re-read as you did. 😆
Very well explained, Dr. Becky you are such a great science educator!
I'm a big fan of all your videos but this one was really outstanding. Extremely well explained
Thank you!
Excellent explanation of a complex subject!
0:21 - Baby Dr. Becky! ;-) And those star animations at 1:37 and 2:15! Thanks for the great work and explanation for all of this, Dr. Becky. Much appreciated!
excellent video, Dr B! of course, they all are! loved your most recent book, too! now, i need to read the other one. thanks and.......Happy St Pat's Day😃👍
Great explanation! Space is hard, words are harder. I might have to borrow that.
Dear Becky - Excellent Video with great visual and excellent explanations, very well done. Please keep up the good work. I like how you explained about the Gaia mission and how crucial it is, however you missed to mention the LAMOST spectroscopic survey. The Xiang&Rix 2022 study relies on spectroscopic data from the LAMOST survey - the stellar parameter, radial velocities and the chemical abundances come from these spectra, without which accurate ages and this kind of study is not possible.
Beautiful Bloopers!
Nice work, thank-you!
You are fantastic. Love your videos. Learn much from you. Thank you very much. Live long and prosper 🖖
Sooo, the word "bigger." Would you possibly think about using either more massive or having more or less volume (voluminous?) when describing stars. I teach physics and astronomy and I've run into this misinterpretation too many times, because I, too, inadvertently use the word bigger. Your videos are wonderful, many of my students watch them. It goes without saying (but I'm going to say it anyway), I never miss one, I enjoy them, so much. Thank you.
I was feeling under the weather today - even lost track of what day it is. Then this popped up. Now I feel much better. Thank you.
Thanks!
That was super informative, thank you! It's weird, a friend of the family was asking only 2 days ago about how do we work out the age of the stars and galaxies... i'll send her this way!
Tanks Dr Becky, así Google traduce bien los textos , pero lo mejor es que se escucha el timbre de tu voz, que yo opino que es bonito😊
Becky, what is the reason for the lower main sequence not being quite straight?
The switch between two versions of fusion. From what’s known as the CNO cycle (stars heavier than the Sun) to the proton-proton chain (stars less massive than the Sun)
yet again you have done it again so wonderful i only understand a small percentage of the video but its mind-blowing
As always, great content for non-scientists.
I was there. Gawd, I feel old. LOL!
Thanks for the video, Dr. Becky!
For some reason, I never realized how old the Milky Way is. I'm so used to thinking in terms of the age of our Solar System.
Relatable 🥑🗣️
Brilliant ! You have just about encompassed the theories of everything in your interesting explanation. So determining the age of our galaxy has not at all been a simple task though challenging and knowledgeably rewarding.
Becky, a general question.
1: do 'we' know if the strength of space-time is the same everywhere? I can imagine it being weaker where it gets stretched?
2: Do I get this right?
Lightspeed is a constant, but as space gets stretched by mass (x speed?), light has to travel a longer distance through that stretched space, which logically takes more time?
Hi Doctor Becky. Enjoy your content and it answers many of my questions. If I had a few more in-depth ones, could you recommend a resource for communicating one-on-one with an astrophysicist/cosmologist?
Always a good day when we get to spent a little time in Dr. Awesomeness's class. Thanks Doc.
I love these videos when you explain how the scientists got to a certain discovery. We can have an idea how the data looks and also how much effort is behind a simple claim that our Galaxy is 13 bn years old. Other channels usually provide just visualisations, and yes, the visualisation are nice and helpful, but I would also like to see how the data looks.
I really enjoy videos like this; videos that explain how certain measurements of celestial bodies are measured. I hope information like this gains more virality.
I think becky is related to Jay Leno on some blood line or something!
You should check into that. You were such a cute kid!
She has so much style and confidence!
Great video dr. Becky
Great video. I enjoyed the changing Becky montage.
I remember reading something on stars a long while back on something called black dwarf stars. The idea was that star start out as yellow giant expand into a red giant eventually collapse into a white dwarf which at this point is basically a small very dense piece of rock slowly cooling over millions of years Like a hot piece of cooal taken out of a fire. The part that interested me was it's estimated to take so many billions of years of for a star to go through it's yellow red white and eventually black phases that it'd be more time than the universe has actually existed for.
Pretty awesome stuff! Great video!
a full 1hr of bloopers from your sow would make my evening.
Taylor opened her tour in my town last night! 💓
You're the best astrophysicist I've ever known, yet have never met. That's a strange paradox. Eh, I still appreciate everything you do for your audience. This was a great topic. Thank you for tackling subject matter like this. Cheers, Dr. Becky. Oh, and what did we learn today? Methods used to measure the age of our galaxy, but more importantly, Dr. Becky is a Swiftie. I'd glitter up and go to the concert with ya. It looks fun.
Hi Prof. Dr. Becky ! Which desktop/laptop cosmology or Astrophysics applications is best for learning computational Astrophysics or Cosmology for programming?
I literally love each your each n every vdo Ma'am Love from a Lil Fan from India ❤❤
wow, the graphics are amazing, thanks for the extra editing work!!!
Thanks Dr. Becky. Keep looking up.✨🌟⭐️. Martin from the Emerald Isle ☘️🇬🇧👍
How close to the limit of what can be done from an earth bound perspective is Gaia operating? How much better would the data be if it could be pulled from a much longer baseline (say >10AU) and much closer to simultaneously (i.e. multiple spacecraft taking the pictures of the same patch of sky)?
Interesting way of touching on the use of H-R diagrams in deducing the age of a group of stars. If I understood it correctly, the lower left hand corner of the diagram is initially populated by fast-dying stars, they blow up and then their elements form main sequence stars, and these in turn blow up and their matter make up stars in the upper right quadrant, e.g. subgiant, red giant, or super giants. A very pedagogical explanation to be sure.
How many Cepheid variable stars and clusters are now within parallax reach, via Gaia?
So cool that Gaia caught Webb out there. :)
I'm thinking about making a spectroscope of my own. Using an old cheap refractor and a prism, with a camera attached. Not sure how to pull it off yet though.
ua-cam.com/video/fW4aMOSVv_8/v-deo.html
UA-cam for you, enjoy
Caught Webb? It's in space since 10 years :o
@@Shonras Caught Webb in a capture. Hence the word "caught". That's what telescopes do. Catch light.
How long/how many supernova does it take for us to have the elemental composition we have here on earth?
Are earth years and earth distances correct measurements to use when discerning time and distance?
Thank you for this video. Very informative
I love the look of Baby Becky there 🙂
Good videos, keep them coming !
Thank you for another enlightening video. You often talk about Gaia taking stellar spectra and even show samples, but does Gaia have a list showing spectral types? Like star X = G2 v, or A6 i. I keep looking and I can't find any so I continue depending on Simbad for such info. If gaia does have such a list, how do I access it? Thank you.
Have you read this Reddit thread?
"How to figure out spectral type from SIMBAD/GAIA data?"
(Not linking directly in case my comment is automoderated.)
The Hertzsprung-Russell diagram is gold
It makes a good song, too: ua-cam.com/video/xN7U8VPd9_U/v-deo.html
Such a clear and easily understandable presentation. Excellent graphics. You rock!
Such good explanations. Instant sub
Welcome! And thanks 🥳
Dr. Becky, have you seen the strange object(?) in the latest JSWT images? It's at the very top of the composite image and about 1/4 of the way across the image starting at the left. Would be curious to see what you think it is. Cheers!
First off, great video as always. The simulation in the first minute of the video shows what looks like explosions or bullet trails that do not seem to be directly related to mergers. Is that just an artifact of the simulation, or is there a cause for these outbursts? Are they just delayed results of bursts of star formation due to mergers?
Nobody knows how old it is. It’s merely impossible to tell. They think they know but all they can tell is about how old plus or minus a few billion years.
5:24 oh, this animation was incredible
Great video, I really needed to learn this and you nailed it (as usual).
However, I know this isn't essential to the story that is told, but the illustrative animation at 3:12-3:27 doesn't show the right movement of the spectrum. For example, when the star is at its furthermost position it shifts from moving away to moving towards us, and thus the spectrum wouldn't be moving at that moment, rather it would change direction.
(I'm also extremely funny at parties 🙂)
I apologize for prior comments… I was confused.
Random Blackhole question: I have heard that if you were to watch a person fall into a black hole. The observer outside the black hole would see the person slowing down as they approached the event horizon, eventually seeming to be frozen at the event horizon. If the black hole is spinning, would the observer see that frozen image of the person remain stationary? Would the image of the person appear to spin or orbit the black hole due to frame dragging? The event horizon is not a solid surface, so it shouldn’t spin with the black hole, but it is hard to imagine that the last image of the person falling through the event horizon wouldn’t move.
The question is... How do you get this into the blooper reel at the end?
Perhaps a re-enactment? 😊
I... have no idea what you are trying to say
@@leave-a-comment-at-the-door when she first published the video there was a spelling error in the title. She later corrected it but I wondered if she should add it to the blooper reel at the end.
Thank you so much for all your content. I learn so much from every video. You may have answered somewhere else. Do we know if our star was formed in the Milky Way or the Sagittarius dwarf galaxy as I have heard suggested?
Seeing an accomplished astrophysicist spontaneously break out in song gives me hope for mankind every time.
Is it possible for stars and other structures start forming before re-ionization?
Hmm, measuring the wavelength of light through color differential adjustments may also help determine time over distance. Yeah um size of a sun "taps chin with head tilted sideways". Surprises me that they don't use other filters pertaining to other subjects that like to overlap.
Thanks Dr. Becky! Is there any problem with using a unit (the year) for measuring the age of something that existed an enormous amount of time before our earth and sun ever existed?
not a comment....just a question....from what you're saying it seems there is a pulsating effect of stars from the beginning of time that are born..live ..and explode...and that material eventually from all the other exploding stars regather all the available hydrogen, thru gravity, to form again new stars to continue the cycle again and so on and so on. ......Another thought is that all the heavier elements from exploding stars some how find their way around another star's gravity eventually to form planets or the like...if that be the case, then most stars in the universe have planets circling around them at various distances....which leads me to believe how very unique Earth and our solar system is!
Another thought...where did the first hydrogen come from? Was there only a set amount of hydrogen in order for the "big bang" to happen?
Greetings, I am a physics hons undergraduate student in first year and wanna pursue career in Cosmology. May you please make a detail video on how to obtain data(like data u use in video) and how to understand the data too...
Given that we can’t model magnetic affects, is it possible we are significantly off what we know? Ie how much of an effect do we think magnetic fields come into play?
this video left me very impressed, very good, thank you....
Thank you Becky 😘🙏
Once you get down to single digits of solar masses, the stars won't go supernova on their own(*), but instead form white dwarfs.
(*)Unless something dumps stuff on the white dwarf later on to cause a Type Ia supernova.
The cut off is about 8 solar masses.
@@stargazer5784 I've read of a bit of a range for that cutoff -- maybe the exact cutoff depends upon initial composition and resulting rate of mass loss?
Eric Donaldson (born 11 June 1947 in Bog Walk, Jamaica) is a Jamaican reggae singer-songwriter. He originated in Saint Catherine, Jamaica.
What's Your Opinion on Halton Arp's theory on the electric universe, it disproves the big bang cosmological model. He explains it with the anomalous redshift of quasar Markarian 205 which was further away from the NGC 4319 galaxy. It had the bridge between the NGC 4319 and the Markarian 205 in the neutral hydrogen wavelength(21cm).so how can it have a bridge when it's 14x further away from the NGC 4319 and is there any conclusion on this topic?
And what is the error bar for this estimate?
White dwarfs are a way to measure the age of the galaxy (right?). I'm working with the IFMR with a star cluster and models have the cooling age for white dwarfs and using the IFMR you can get the progenitor mass and time before it reached the WD phase.
Does it not rely on seea cephid varia?
So cool the video starts with different ages of Becky in photos, so cute
Fascinating! Thanks, dr. Becky! 😊
Stay safe there with your family! 🖖😊
Dear Dr Becky, Can you give a different explanation for Doppler shift,the analogy with an ambulance siren is just that, an analogy. Sound waves are a mechanical thing, light etc. is an electromagnetic thing and the two are not to be confused. Presumably, as the wavelength alters then the energy level of the Doppler shifted photon alters. For me, this is a puzzle!
Didn't Hippolyte Fizeau demonstrate that Doppler applies to electromagnetic waves too?
To summarise, we can age astrophysicists by looking at their baby pictures (awwww), while we age stars in galaxies by looking at their retirement party pictures (awwwwww).