The Life and Death of Stars: White Dwarfs, Supernovae, Neutron Stars, and Black Holes

[@mayastaples2658]

as a member of the hard of hearing community, i must say that i really appreciate you captioning your videos! i have an audio processing disorder so its really hard for me to understand and process spoken information and speech. you can imagine that makes it really hard for me to learn what i need to at school, and so i supplement with a lot of youtube videos. it's so hard for me to find good material that doesn't just have auto-generated captions. thanks for being inclusive of all your audience :)

[@patrogers6297]

Hear! Hear! I have the same problem and have to bypass so many interesting looking videos. Thanks for calling attention to this.

[@joseemiliomelladomolina4818]

zzzzzzzz is so boring

[@neilsiebenthal9254]

@@nenmaster5218 yes, but point? ?

[@bordershader]

Agreed, another person hard of hearing here, so appreciated. Great vid too, I've learnt so much. Thanks 👍

[@TheBluePhoenix008]

I thought the subs were for idiots like me 💀 Oh well that just proves my point lol

[@gdiaz2623]

This is incredibly helpful for my astronomy class this summer. You managed to take around 4 weeks of information, with all lecture videos coming to a total of about 5 hours, and condensed it into a much more comprehensive video with better visuals that is under 20 minutes. Absolutely amazing and I thank you so much for this.

[@pro-rw9xz8co9p]

Thank you

[@jeffreysmith6910]

Professor Dave, that’s the best H-R diagram description I’ve ever seen! Most H-R discussions are simply temperature vs mass explanations. You correctly make it a “roadmap” for the life of high/low mass stars. Even textbooks I’ve read don’t make that connection.

[@AboXyab]

🤬

[@plasmaastronaut]

its a pity Dave's interpretation of is wrong, and identical to that of all the other astro sheeple

[@ghz24]

@@plasmaastronaut Back to flatardia with you.

[@lauramoreno8742]

plasmaastronaut what... care to elaborate?

[@plasmaastronaut]

@@lauramoreno8742 guess i'll have to do my own vid on the HR diagram. it'll be nothing like the normy interpretation

[@michaelpisciarino5348]

0:58 Lifetime of Stars 1:39 Nuclear Collision, Nuclear Fusion 2:34 Low Mass Star 4:24 Hydrogen gone, outer layers pushed out, ----> Red Giant for 1 million years 5:00 Helium Flash 5:30 Burning Helium, entering the Horizontal Branch 7:06 High Mass Stars. Big Stars goes out with a Bang! 7:40 Hotter Star, Faster Fusion Quicker Burning 8:25 Layered fusion, to a Core of Iron Nuclei, EXPLOSION 13:20 Collapse Into A Black Hole - Warps Space Time - Consumes Light -The Remnants of Huge Dead Stars 14:47 The Stellar Life Cycle

[@lutherburgsvik6849]

Thanks 👍

[@samstarlight160]

@@valsarff6525 what do you mean it's doing work on itself?

[@kiidcathedrale8122]

Red Giant for 1 BILLION years, not 1 million ! but thanks a lot !!

[@manan-543]

@@valsarff6525 oh shut up with that pseudo-scientific crap.

[@Ploskkky]

@@valsarff6525 The pseudo scientific Electric Universe hypothesis has been debunked in so many ways, and so effectively, that it's death has caused a black hole in the brain of its remaining proponents.

[@ZaWakingEagle]

Not only is the content super interesting, you do a great job at explaining it! I love this!

[@ToutCQJM]

You can tell he’s excited about it, and that is contagious.

[@edthoreum7625]

1:20 human life & fraction of blink of an eye,,,

[@Human-gu2cx]

ZaWakingEagle except for the part where he says that a black holes center has infinite density because some scientists believe it may be the plank length and not a single point

[@ZaWakingEagle]

@@Human-gu2cx I googled what you were talking about. I think for the sake of reaching the audience of interest, defining the concentration of mass at a single point is an ok simplification since the plank length is so small. Taking a pretty large mass and dividing it by that extremely small plank length would cause the density to skyrocket to an insane number. thoughts?

[@Human-gu2cx]

ZaWakingEagle and really there’s more speculation about black holes than he lets on

[@TheBsheep]

I've heard a star's life cycle dozens of time but this is by FAR my favorite tutorial!!!! Very informative.

[@liztcalistre6341]

In these 16 minutes I managed to understand what my science teacher couldn't teach me in 3 weeks tysm

[@yaboiyaskiii]

@@scottgames527 facts

[@ItsAshlxy]

@@scottgames527 tru fax

[@user-us2hx3xo8e]

You learn more when you want to learn and are interested in the topic

[@amlanadarshdas4470]

@@user-us2hx3xo8e I am interested in topics and still I can't learn anything

[@fletchy88]

@@amlanadarshdas4470 you absolutely can.... You just need to stop yourself and get into the ”flow state" .... Try doing different things in your head and try... Instead of just doing the same thing everyday

[@extartempore6150]

Girl: tell me something romantic Guy: you are as rare as the element with atomic number greater than 26

[@fantoast6932]

damn...

[@Fred_the_1996]

Boi, u are as rare as hydrogen

[@EmomanTavish]

@@Fred_the_1996 hydrogen makes up 90% of mass in the universe, if you were not just joking around

[@EmomanTavish]

@@sohinimukherjee2856 youre not smart enough to woosh me since you dont get it

[@EmomanTavish]

@@sohinimukherjee2856 you still dont

[@remitoinfinity]

Every time I come here I'd get so fascinated by not just the facts but also by how easily understandable Dave delivers the topic, to the point that I feel so eager to click the like button right after watching, only to find that I've liked it already!

[@dongato6838]

I've never heard it explained so simply, clearly, and beautifully. Thank you so much. Subscribed!

[@pro-rw9xz8co9p]

Thank you

[@anirbandutta8000]

It's very hard to explain complex things in simple ways. And you have just done that! Kudos!

[@zerokmatrix]

I think this is aimed at kids, and despite being an adult with a lifelong interest in science and astronomy and having an above-average level knowledge of both, I find these videos extremely entertaining and chocked full of facts I had forgotten or didn't even know in the first place. This channel definitely deserves better recognition and more subscribers. My friend has just had a baby and this is one of the channels I'll recommend he lets his kid watch while growing up

[@patricksarama4963]

Your friends baby will get to grow up watching science Jesus

[@thunderspark1536]

@@patricksarama4963 Except professor Dave doesn't have people saying he rose from the dead, is the son of god, died for our sins...etc. He's just a man like any of us, communicating peer reviewed, studied, and well understood processes.

[@shankara8132]

@@thunderspark1536it’s a joke

[@archiefromuno]

I think the worst part of denying science is that you can’t appreciate how cool the existence of all this is

[@kushclarkkent6669]

They wouldn't understand it anyways lol.

[@olm8829]

They just want a simple explanation of everything. It’s way easier to say “it was all created by a god / the gods”, than actually trying to understand it all.

[@shawnsisson920]

what a moronic statement. Science is wrong all the time, so how are you defining "denial"? Its just disagreeing till theres evidence that its incorrect, which happens quite often. In this topic, where we know so very little through direct evidence, skepticism is a necessity

[@stewiegrif1]

I'm working through your course right now Dave, and I wanted to let you know that this is such a beautifully constructed course. It blends a perfect balance between being detailed, but not overly complex, and maintains a phenomenal sense of flow. You explain things in such a way that it captures the true essence of the concept, yet also leaves room to explore other pieces of it in more detail. I always leave a chapter feeling like I learned something really cool, and I feel like I'm growing after each video. This series really means a lot to me, and I'm very happy to have found it!

[@anthroposlogica9379]

Professor Dave. I am a student of Anthropology and i never thought in a million years i could understand astronomy. I picked it up half a year ago to fill a hobby. and you have made it so easy and fascinating to study, i always take to my telescope after your videos man. Thanks a ton

[@charminharlan9081]

I slept through my astronomy lecture this morning, thanks for helping me keep up! Plus, this helped me understand the HR diagram so much better!!

[@Lightgreen57]

It took my teacher like the entire science class (45 min) to explain the same information. Keep it up!

[@allo9228]

He deserves a million subscribers. He’s a very hard worker

[@zaynab3970]

Al Lo IKR

[@peterowley2014]

Propaganda for gullible people.

[@ThiccSiccNicc]

@@peterowley2014 arent you fun

[@peterowley2014]

LMAO I love entertaining simple people "grade school"

[@xavierlauzac5922]

Pete Rowley it’s true.

[@johnrupesh4535]

Closed the video without hitting the like button so came back specifically to do that. This video deserves it.

[@quahntasy]

Dave is such a nice explainer. He deserves a million subs

[@direwood]

This is the most informative video on Astronomy I've ever seen! Keep up the great work!

[@raffia16thblaze10]

2018: "its impossible to see a black hole" 2019: "We made a photo of a black hole"

[@Fred_the_1996]

I know I'll get whooshed but the photo represents the glowing gas around the blakc hole

[@xiaozhang7103]

technically, it's a photo of the black hole's event horizon.

[@raffia16thblaze10]

Yeah well its still something and its provem that its possible. To get an image of one even if it is indirect

[@andersonklein3587]

@@raffia16thblaze10 Nope. He was making a point you can't see the singularity. Which is debatable but definitely not something we've ever done. A naked singularity could be anything, as far as we are aware, but not purely a point since it has spin, no one knows what shape or volume it has, if it even has one...

[@raffia16thblaze10]

Yall are taking this too literally guys.

[@rafaelakkauy1004]

Professor dave I'm a teacher and I've got to hand it to you. You do such a good job simplifying difficult ideas that it's beautiful to see as well as being informative and enjoyable. Rock on :)))))

[@-trustworthy-3950]

You are indeed a truly hard-working KZbinR and explain everything properly and in a fun way keep it up plzz

[@kalimeet___1524]

Love this channel. Getting ready to head to college for math and physics and always good to see someone informing people who chose to go another route in life

[@InvisRatEnjoyer]

Thank you Dave, this video helped me so much to an atrophysics test. Massive Thanks to you, keep doing what you are doing :D

[@InvisRatEnjoyer]

Update, got an A thanks to you. 👊👊

[@siddhantagrawal711]

Thanks.this is the first video on KZbin which gives complete information about star formation,their life and death. I requested many KZbinr to make videos on this topic

[@tiredweeb8379]

You are a saint. In school in order to graduate we need to make scientific paper about any subject that interests uns and I chose stars. Here I was about to cry because we have to use scientific papers to write it and source them and I understood nothing and your videos explained everything so well. (Also the way you narrate is extremely fun and engaging) I hope you have cold pillow for the rest of your life, that you are happy and successful and may life grant you all your wishes.

[@PedroSilva_ytptbr]

"We are all made of stardust" -Carl Sagan

[@radinelaj9280]

We all are made of star dust - quran (1400 years ago )

[@spoodlydoodler3552]

@@radinelaj9280 Carl Sagan is a much better person to quote from.

[@suhyibmazmy87]

@@spoodlydoodler3552 most of the time I will get angry when I see comments like yours but ill let you off since I just woke up and I don't have enough energy to get angry

[@spoodlydoodler3552]

@@suhyibmazmy87 good for you.

[@alexanderkarvos6728]

*snort Stardust* Mmmm. Star makee

[@samiranshil576]

knowing about stars is my favorite hobby. i have seen tons of videos about stars and black hole, but you are too good. you deserves millions of subscribers

[@gewhyfrank9252]

This is the best video explaining Stars life I’ve every seen.

[@Eztoez]

This is the best explanation of the death of stars I have so far seen on youtube. I was always confused about supernovae, neutron stars and black hole formation. Now I feel I know a lot more and am less confused. Thank you so much for this informative video.

[@MrLorincombs]

Dude...thank you for teaching me so much and giving me access to this stuff... Its truly appreciated

[@hemenpalani9793]

Thank you Professor Dave. I get more and more thankful for every one of your videos. They are so perfectly organized. Love from Norway.

[@jaxwoodworkers]

WOW!! What a great explanation of stars. Great job as usual Prof. Dave!

[@AdiS7-l3c]

Great video no words. After this u need one video on netron star he missed the depth of that topic n then ur star life cycle is done.

[@florinfiltervac1415]

This is the best explanation that I've looked for in what happens with the atoms actually, when the mass is contracting that much, first atom pushing atom, then an huge nucleus of neutrons, then a black hole. Now I've figured out finally all, generally speaking. Thank you, that's light in my head now.

[@ronburgundych.4634]

I have an exam tomorrow and this video hit nearly every vocab term for the star death section on my review sheet. Thank you so much!

[@williamsaunders670]

Love this Professor! Best expo of star life cycles I've seen EVER

[@stbny4444]

What a well done video. Amazing clarity and simplicity.

[@yeyee4707]

I already know this stuff but it’s just interesting to listen to

[@penrythajanitor1977]

Plus Professor Dave is excellent at explaining complicated concepts in an easy to understand fashion... not a lot of people can manage that... especially without being patronising...my man is a star, pardon the pun...

[@aleleeinnaleleeinn9110]

The music is silly, but the content is esxcellent. A concise explanation without the math. Science for everyone. Nice job.

[@kingcrabbrc]

"we will probably never see one..." M87: 🙋🏻‍♂️

[@ProfessorDaveExplains]

Well we can't see inside one is what I mean.

[@CTGReviews]

Oh, hi! How’s your friendship with Sagittarius A*?

[@patricksarama4963]

@@ProfessorDaveExplains spinning black holes are typing... ⚫️

[@Mark-Wilson]

why are you susbcribed tog aia aslo you're a troll I found you on a flat earth video

[@TornadoHarry]

Nice profile picture

[@harshsinghal4342]

I think that this video is really good and deserves much more views than it actually has. Your channel is way too good than others.

[@jacobblumin4260]

Excellent video! Excellent information presented well. Keep it up.

[@neub4321]

Great job tying together disparate ideas and terms I've heard about from watching other astronomy videos. That's challenging. Thanks

[@carolynnbrunsdon6165]

Honestly this video is so much appreciated for my test tomorrow T.T

[@anthonymanczak9411]

The sheer thought process of how dense a Neutron Star is is insane. Like, I can't even wrap my mind around it.

[@belladupont6777]

That was incredibly fascinating and easily the best explanation I've seen for the formation and life cycle of the main planetary objects. You make it all very intuitive. 👍

[@tomaszwida]

there is a lot more that going on in between these fusions cycles into new elements, also there is a difference luminescence between type of starts as well as the temperature they are burned at. however this is very good concise information on very lengthy and somewhat complicated topic. great job!

[@bens.5127]

Effortless knowledge. You are one smart guy, Dave! Thanks for sharing!

[@henockmatulampaka7712]

this is the most simplest and adequate way this content have been explained ,even for an non native english speaker( french) like me ,it was really flexible to understand . thx you

[@shocbomb23]

You should do videos over time about all the possible Hypothetical stars

[@Swaggaccino]

this

[@arshnoorkaur364]

This is such a amazing explanation! Very simple to understand and the visuals are so good!

[@josephgrant6300]

So glad I found your channel! Thank you!

[@Deanrite]

I learned all this in Jr college, but I have to give you credit with how you simplified it and made it so understandable. That's exactly why education works well with the right people doing the educating rather than a guy droning on endlessly saying "Mkay?" every 5 seconds. Thank you for your efforts.

[@Taricus]

This video is so impressive! It covers so many things that astronomy and astrophysics classes would have in a textbook, but it stays entertaining and fun to watch ^_^

[@jdillon8360]

Great video Professor Dave. I re-learned a whole bunch of stuff I had forgotten since high school. You are doing a great job. Cheers!

[@rafaelricardovilorio602]

This episode has been particularly special for me because I often wonder about stars, and I daydream that they are living things.

[@HEXCODESexe]

@Th30r3t1ca1 phy51c5 Betelgeuse is the cool kid from the block.

[@HEXCODESexe]

@Th30r3t1ca1 phy51c5 Just don't mess with Ton 618 😨

[@DucLemd]

I really like your videos. It's also unbelievable that more than 6 months later, we finally can capture a picture of a black hole.

[@yanoshgloxinia]

I have an Astronomy class this semester and the students teach each other so I am happy I could find someone to help me teach (not really me but 🤫) so thank you. 😂✌️

[@markdristy]

This is the best quick explanation of star life-cycles that I have seen.

[@vivekpanchal3338]

Wow, your work is easy to understand professors. 👌👌👌👌

[@sanjay46u]

Nice way to explain the life cycle of stars which makes easy to understand the giant concept of red giant and other stages of dying star. Kudos!

[@purplehaze2358]

Electron degeneracy? As a degenerate myself, I can assure you electrons aren’t the only things going through that.

[@WilbertLek]

You should use a picture of the amulet as your profile pic.

[@xxxman360]

But at least electrons are actually good for use

[@samueltrusik3251]

before you ask, bright, no, chainsaws aren`t the answer. not even more chainsaws. And MOST DEFFINATLY NOT chainsaw CANNONS.

[@PaulaJBean]

The real degenerates are flat earthers. The flat earth movement back then: skeptoid.com/episodes/4338 , and now: skeptoid.com/episodes/4521

[@lauramoreno8742]

Chainsaw is the way

[@himashah2128]

Was literally looking for a video that explains this topic in depth..but my expectations were not meant to be fulfilled until I found this video🙌🏻thanks for sharing this video..

[@RigelStarxBetelgeuseVirility]

Thank you, Professor Dave. Love it!

[@AlokAwasthii]

This video hooked me to your channel. Thanks for providing such in depth knowledge :) . Also I love your intro songs and animation.

[@shashanksharma2428]

Just Stumbled upon your channel today You Are AMAZINGGGG

[@christheswiss390]

Best structured and most instructive video I've seen on this topic. Thank you very much!

[@JohnWayne-86ed]

Who's here after the first picture of a black hole was revealed?

[@RetroPianoGuy]

Not me. The theory of relativity breaks down at the center of a black hole. People like to say "infinite density", including this video, but what actually happens is unknown, and the theory of relativity does not provide the answer. Black holes are fascinating phenomena and we are circling one right now! But it is not infinitely dense. It has a known mass and a known volume as well. Why not just calculate the density from that?

[@afzumohammed2799]

Me

[@diamondgeezertunes]

Not me

[@josephisrael8959]

@@RetroPianoGuy What's the mass and volume?

[@kenskog]

@@RetroPianoGuy Because all the mass of the black hole is on the singularity, which is infinitly small (planck length). How do you calculate density of something infinitly small =)

[@techmakerguy3207]

Oo...thank u sir...u can teach far better than our school teachers...once again thank u very much

[@shep9231]

Whats ironic... I came here because of a misclick... and I stayed for the content. Truly fine work with this video bud. My hats off... and you just earned my sub too!

[@innertubez]

Thanks for this awesome video! One question , though: the “horizontal branch” doesn’t look very horizontal. How did it get that name?

[@prasantpanda5680]

At 5:58 I don't understand why the core wants to eject all its energy by expanding in the giant red phase and why does it push the outer layers in order to do so? And how does expanding cause energy release?

[@spacetraveler3286]

That was the best explained video I have seen. Well done you made it easier for some of us to understand all this stuff. Worth subscribing to 👍

[@DavidMartinez-df9gu]

The best channel I have ever found on youtube.

[@kenichiotaku3693]

With the knowledge researched for this video and subsequently put out by it we can now be truly humble in the face of our maker, that turns out not to be a Who but a very long natural process. As astrophysics professor Lawrence Krauss put it, "So, forget Jesus. The stars died so that you could be here today." x'D

[@WilbertLek]

Hear, hear!

[@rigelmario2912]

u are a genius. i saw billions videos abt stellar evolution but no one explained it like u

[@BigMuff75]

I was wondering - if the universe fell back and collapsed and expanded into / out of another big bang - could / would chemistry and physics be different that time? Or the distribution between matter and antimatter?

[@merveilmeok2416]

Great job for this video! I find this video very valuable and explains information between useful and how to the professor can explain to the limit without using difficulty words in science for non-scientists. Thanks. It takes an “art” for information video and this young professor to stay in this limit of giving us the information without yawning. I give Professor Dave an A+.

[@jensphiliphohmann1876]

13:38f > _This object is called a black hole._ No, it's called _the singularity of_ a black hole. The black hole itself is the inner part of the point masse's gravitational field which is divided from the rest of spacetime by an event horizon. Note that this is just the simplest case of a SCHWARZSCHILD black hole which doesn't rotate which most black holes will.

[@Ender3264]

The centers of spinning black holes are called ringularities. 😉

[@nebtheweb8885]

And now we have 'white holes'.

[@theunknownspeedrunner276]

I just started the video, and I don't know what's next, but I was shocked ny the "Professor Dave again, Let's kill some stars !"

[@taresauce3759]

me:*sees thumbnail* also me:EVOLUTIONS?

[@yumnaminhaj9949]

13:06 but even more MIRACULOUSLY✨

[@yumnaminhaj9949]

simply the best✨

[@Schizniit]

How are people not utterly breathtaken by astronomy? I'm glad I spent my childhood looking through a telescope and wanting to study the universe with my own eyes. Flat earthers clearly haven't done so enough.

[@Gorth_the_Ork]

Nah, they rather believe whatever they don't understand just makes no sense, and if it doesn't make sense to them it can't be right... and then imagine everything to be made of nothing but light, and all the beautiful special sky-lights must be very close to us because we're so goddamn special! That's why they can't accept the sun, moon and stars are millions and billions of miles away... It would make them feel a lot less special... They can't handle their own insignificance! So they keep telling themselves how special and important they are... I'm not familiar with psychology, but it could be some sort "defense mechanism" to avoid having an existential crysis.

[@user-mx8nr3sp6n]

That was a stellar explanation. Thank you, Professor Dave.

[@rhoddryice5412]

Punny you are.

[@Francois424]

I thought that an M-class star, especially the smaller ones, didn't experience a Red Giant stage? That they went to White Dwarf in a more "relaxed" manner if you will. Can you enlighten me on that ? I loved the vid; thanks !

[@TheMelodicMess]

How am I only just now discovering your channel? Subscribed!

[@fartopiaa]

This was very well explained. The images and animations you used to show it was "STELLAR." Get it? Overall, great video. You earned a new subscriber. Your videos are neat, and I feel like I could show these to my science teacher. Thank you.

[@MTEXX]

One of the most comprehensive solar life cycle vids. Thanks!

[@arhmlmao]

"lets kill some stars" *insert intro*

[@maheshkandgule4266]

Hahahaahaha.

[@ameter6422]

what dont kill the our sun

[@anuskaakrishna2089]

It is really helpful professor 🙏🏻... I am preparing for international space Olympiad and your video is the most satisfying and really really understandable video... Thank you sir...

[@vari1535]

Professor Dave again, let's k i l l s o m e s t a r s.

[@AbhishekTiwari-uy7ff]

man,you make it look so easy......big fan of ur style..

[@Raz.C]

13:40 "this is called a Black Hole!" So that's how my ex-girlfriend's heart was made?

[@conflict6292]

Your ex had a heart !?. That must have been nice ??.

[@Silhouex]

My ex is probably a black hole, she's very attractive.

[@conflict6292]

@@Silhouex Im starting to suspect i may have drawn the short straw in the girlfriend stakes !?...

[@sumaiyatahsin4707]

Wow amazing!!! I was in the middle of the vid and couldn't help going back and giving a big thumbsup. So beautifully nd interestingly explained. Awesome Most perfect explanation with a perfect tone as necessary. Got new subscriber !

[@princeofcupspoc9073]

Pretty good. Of course there were a few over-simplifications, which make it easier to understand for the people that can't do the math. For example, proton + electron --> neutron is not so much the electron being swallowed by the proton, as it is the energy of the electron being used to flip a quark in the proton, via the weak force. Well done on the stellar burning cycle yielding said elements. And Chandra was a terrible driver. I almost hit his car getting off Lake Shore Drive on the way to school. I think it was a black Mercedes. I love the story of his work on stellar nucleosynthesis. As he was mapping stellar spectra (every nuclear reaction has a distinct spectra), there was one spectra that didn't match up with any of the known reaction. Not one to be wrong, since he was sure that reaction had to be there, he dug up the original nuclear physics paper, and found a mathematical error. Correcting the math, the reaction fell perfectly in place. So much for that student's thesis defense comity. Oh the embarrassment!

[@007artimus]

This is such an incredibly well done summary.

[@ME-dl6te]

I know you are dumbing it down for others but red dwarfs (the most common star) won't super Nova or even nova but they will live the longest and fizzle down like a piece of charcoal.

[@danyaverplak8910]

what happens if you fly a satellite near a white dwarfs orbit?

[@marvinkitfox3386]

@@danyaverplak8910 Define "near" Sufficiently close, the tidal effects (the satellite bit closest to the start experiences a *lot* more gravity that the furthest bit) to shred it to a spagetti of dust.