This is one of the best science channels on UA-cam. As a 67yr old I still remember how things were before the internet and I believe this allows me to appreciate it more. If someone told me back then that everyone could access more or less the sum total of human knowledge and culture from a small box in your room I would have thought them mad!
For real. The effort he puts in his videos and the quality, are amazing. I grew up with early days of internet and this was a dream for us, to have this quality content h24.
I am a lot younger than you but i remember before i had internet i had read every decent book at my local library it was miserable compared to how it is now.
3 years late. I once worked an aerospace systems manufacturing facility and my job was to measure luminance etc. on flight panels. 13:34 you explained in 10 seconds what took them 6 months of training to get me to understand. This is what makes good content creators just that
It’s kinda disturbing to think that 100 years seems a long time to humans, but on a cosmic scale 100,000 years is equivalent to about “a blink of an eye”.
the time it takes for us to blink once is about 1/372,000,000th of a lifetime 100,000 years going by is about 1/72,000,000,000th of the universes current age
I took Stephenson 2-18's numbers to a habitable zone calculator, and it gave me numbers like 630 AU - 1111 AU, which is a mind-boggling distance. Pluto is at its furthest at 49.3 AU, for a point of reference.
I have watched many documentaries on the universe but still didn't know how stars are formed until this video came along. The explanation was easy enough to understand which is quite a challenge on it's own.
This stuff interests me so much. I suck at mathematics, and I have a lot of trouble visualizing large numbers… But astronomy and cosmology is so fascinating. I just keep binging these videos. I appreciate all you do man!
@@Refrigerator44 I’ve since heard something that really helped me understand the vast difference between a million and a billion; a million seconds is 11.5 days, while a billion is nearly 32 YEARS. It’s mind blowing stuff!
@@BeeruzChryslerfair enough. You should go to very crowded places like a concert to know how many people there are and since they usually measure attendance it's pretty easy to verify. Or just watch videos but it's nothing like actually seeing it.
I have to give it to you man. I watch videos about stars, space, galaxies, universe In general and things alike. This is the most jam packed yet simplistic video ive seen. Its got a lot of info on stats yet its not overwhelming and is still understandable for someone who doesnt have an the first idea about stars. Bravo my friend, bravo. Thank you for this.
I need you to know, that your videos are next level. Each and every fascinating film has broadened my understanding of our universe immensely. Visually, each video is more elegant and beautiful than the next. Your narration is not only soothing to the ear, and poetic, but you’ve mastered the art of presenting these highly complex scientific concepts in a way that’s easily 😅understood by a simpleton like myself. I FINALLY FEEL LIKE I HAVE found my go to- FAVORITE channel on all things universe/space/etc
You're one of the few UA-cam channels in which I will not just purposefully set-aside time to do nothing but watch your video, but one of the fewer still in which I much prefer to make something of an evening of it ;D A meal, a drink and some SEA is a little slice of heaven.
"Seasons that last a millennia." Mind blown! This whole video was an absolute delight to watch, and I was in constant awe, not just of the scale of our universe, but of mankind's ability to decode so much of it and the methods they use. Thank you, thank you, thank you for this gem of a channel!
I know this is an older video, but this has been the absolute best space video I have ever seen. Everything is so well described, easy to understand and detailed.
Sea, you're fr my favourite youtuber, i have watched and rewatched pretty much all your vids, and i know this is a weird compliment, but putting on your vids when im tryna go to sleep helps like nothing else, so youve also fixed my sleeping schedule xd
Please never stop this endeavour SEA. I will watch you until the end. You are my favourite channel on UA-cam and there is no other channel which I keenly await videos for. Everything you do is awesome and every topic that you talk about is too. You are able to inject such an incredible amount of understandable science in, that your videos are unmatched in their viewing. Your layman's descriptions of immensely complex topics are unparalleled. I can't thank you enough for all that you do, and I beg that you continue it, far into the future. I would love to contribute to you somehow. In any which way. Patreon, bank transfer. Hell, I'd write you a bloody check. For the amount of hours that I have watched your videos (every one of them numerous times) I owe you more than just pitiful Add revenue. Please respond so we can work something out!! -Jack from Dorset, UK
Thank you very much that’s very kind, I’m glad you like the videos 🙂 if you want to do something extra you can become a channel member! channel members get early video previews as well 🙂
I find it fascinating that many of these stars could already be dead. Think for a moment, if a star is 10,000 light *years* away from us, we’re witnessing the star 10,000 years in the past
Well, 10,000 light years is pretty damn far. On the scale of a star, not much happens in 10,000 years. Most stars that we think are "close" to death are still sometimes millions of years away from death, and if we were looking at a star 10,000 light years away, it would have to be at the very very end of its life for it to be gone by "now". But even the concept of "now" isnt very clear over vast distances like that. Its pretty hard to think about two events thousands of light years apart happening at the same "moment" so we just consider the light that reaches us to be "now". I love looking up at the stars at night, thinking about the journey the photons that are currently in my eyes must have taken. Some stars appearing as they were 5 years ago, some 30, some 100. What I find more interesting is that a lot of these photons took more time going from the core of the star to leaving it, than they took travelling across space to reach the earth. Honestly, space is just ridiculous. We have unimaginably tiny things making up unimaginably huge things, and here we are trying our best to observe it all. The farther out you think, the less everything makes sense.
@@DizzyFoShizzy Contrary to the meme, pretty much every star that is visible in the sky without a telescope should still exists. Given how relatively close all the easily visible stars are, and even for the shortest-lived stars one or two thousand years really isn't much time, there's even a good chance that every star that you see when you look up still exists.
that effect is why we can see so far into our universe's past. The most distant galaxies and stars tell us not what's there now, but what was there closest to the beginning.
I think they'd be big and bright ALL the time. Hence no night. Yes, yes... what about when you're on the side of the planet facing away from the star? Well, I suspect the light would find a way to bend around the atmosphere so you'd never really be in the dark.
Betelgeuse and Rigel are both really big stars a few hundred light years away. Sirius and Procyon are also quite big and only around 10 light years away. They are all among the 10 brightest stars in the sky, but still pale compared to Mars and Jupiter. I would imagine Stephenson 2-18 from say 600 light years away to be a very similar sight to our brightest stars. But having it perhaps 20 light years away, I guess it could look as bright as Saturn or maybe even Jupiter.
The subject of your videos (space) is fascinating, of course, but what I find to be even more compelling is the way that you explain it. You are technical, but also eloquent. You use this kind of science to appeal to our emotions, and that makes it so much more memorable. There is information about space all over the internet, but I watch your videos because of the delivery. Your narration, coupled with the content itself, is amazing.
Really appreciate your patient introduction to the topical ‘main sequence’ before going full-on hypergiant with normally stupefying size comparisons. Top-shelf content, without question. Much gratitude from Canada; huge thank-you for the new content. 👍
SEA always coming through with the discovery channel level of documentaries. Don't ever stop making vidoes man society NEEDS the kind of educational content you put out, and i thank you for it
They're past the Discovery Channel, there's nothing on cable any more except "reality" shows and a few science and history shows that are made for a 6th grade level.
SEA, your videos always help me fall asleep, you manage to make something that gives people existential dread so calming and soothing to watch and listen to. Never stop, my dude.
@@wesleyhempoli5548 I was going to say the same thing. I don't understand why this type of content makes people feel anxious. It actually brings me a sense of relief to actually get to sit down and watch something, and I feel relaxed. Learning about galaxies and how big stars are and stuff is cool to me, not really intimidating at all. It's interesting. My daughter doesn't like watching this channel or space rip because she thinks that the narrators both sound "scary" - but I think this one actually sounds kind of hot 😂 and Dick Rodstein over at Space Rip is great.
Well absolute excellent video. Thank you. I watch videos all the time on U Tube and have watched tens of thousands probably over last 10 yrs or more. I mainly watch Astronomy and Space related videos and as someone who is massively into Astronomy I already knew a lot of whats in the video, but not all of it. However thats not why I am commenting. I just wanted to say thank you for such a brilliant,informative and superbly presented video. There was thankfully None of the Hideously Loud music, No Gimmiks and Cartoon like Flashing images, No Screaming loud voice and best of all no adverts. If only all Astronomy related videos on U Tube were like ours. Excellent. I immediately liked, and subscribed and will watch all your Astronomy related videos from now on. Thank you.
of all the crazy space shows ive seen , i’m grateful someone finally started their show with what you would think a space nerd like myself would have had a strong grasp on....how a star is made. every time it’s explained it’s explained in such a confusing manner. i learned a lot from this.
Imagine being able to fly to Stephenson 2-18. You park your Starship a few Kilometres from the star (just imagining for now, that the ship would be able to), and looking at a gigantic wall of fire with no end to be seen, no matter what direction you look... I would love to see that.
@@anonymousviewer2165 The sun is closer than a few km?, so whe i see the sun at an 45degrees angle i only need to travel a few km to have it right above me?.
Actually, if you look along a line parallel to a tangent to the sun's circumference, you would see space, and not the star. While the star would take up a lot of the view in front of you, it would not be visible in whatever direction you look, assuming that you could restrict the brightness to a level that would allow for viewing.
I’m 46 and still so new to science. This channel is amazing. But even more amazing are the comments. Finally a channel where everyone is on one accord. I love it here. ❤
The narrater is an absolute legend. The content is immaculate. The information and imagery is of the highest quality. I love it. I can't get enough of this channel. What a masterpiece.
A few years late, but this video is absolutely incredible. Being an astronomy nerd with no science background, some topics are difficult for me to comprehend, such as how stars work. Yet in just a few minutes watching your video, I learned what I’ve tried to so many times and gotten confused just fantastic
Been watching you since early 2016 and I just gotta say, your channel is still amazing to watch. So happy you grew away from GD and followed your ambitions. I can tell you love the topics you discuss and that you put in the effort. Can't wait to see you grow even more in the future man. Love ya
Wonderful video! Thank you for nourishing my mind and imagination. You are one of the very best channels on UA-cam as far as I'm concerned. Always so happy when you post something new!
Honestly this Channel is amazing. I don’t know where you get you digital/visuals from but it looks amazing. Also, the soft, distant drone like music goes perfectly with your voice over, and adds a remarkable sense of desolation. Best of luck in your efforts. I’ll keep coming back to watch!
Thank you so much! If you want to know about visuals, I make them in a program called Space Engine which is available on steam. It’s really cool, it’s a full virtual universe simulator which allows for graphics like that so I would highly highly recommend it if you like this sort of stuff 🙂
It’s awesome seeing VY Canis Majoris being given considerable mention. It’s the star that got me into astronomy all the way back in 4th grade so I have a special love for the star.
That is really interesting because same here actually! When I was in year 7 (6th grade I think that is) we watched a video in school about the largest stars and it was one of those ones where it just kept zooming out. It really got me interested in the subject.
Incredible video! It is a shame that I have discovered your channel now. But people say: "better late than never". Thank you for the effort to make such a masterpiece and it is for free. To all of us!
I just found your channel yesterday, and I've already watched just about every single space video. I think I'm gonna end up watching these again and again, the visuals and the way you make such complex information accessible is extremely unique. Thank you so much for these
its weird. Once you start learning about space and stars and planets and everything else involved, you don't look at things the same anymore. Space is fascinating and terrifying.
Yes SEA, I could listen to you narrate film for hours. Another "Stellar" video ! Yes, the info in this video is mind blowing, but once again, I don't think any of this video went over anyone's head, so to speak. Well Done. Again.
This is so well explained, watched this video about 5 times. Agree with the Attenborough comment and it's nice to hear the Essex accent and the informal expressions, makes it easier to concentrate on the info. Very enjoyable watch 👍
@danijelovskikanal7017why would they? If they're traveling at the same speed it's fine. They would hopefully have enough fuel to adjust for changes in speed compared to each other if it somehow changes.
Great video! I particularly appreciate that you spent the first 15 minutes on background and methodology instead of jumping straight to the list - it really puts the measurements into perspective and makes it a lot easier for us scientifically-minded laypeople to appreciate them :^) I tried looking up the mass of Stephenson 2-18 but couldn't find anything online, not even an estimate or an explanation of why there is no mass estimate. Do you know anything about its estimated mass? or about why its mass can't be estimated? Cheers from Sweden
Thanks, glad you like it :) I’m not sure what Stephenson 2-18’s mass is, but I think scientists don’t really bother with red supergiant mass because it’s a lot less than you might expect. Most red giants and supergiants eject most of their mass and become much less dense when they exit the main sequence. I remember reading that one of the largest is only 10 solar masses. The mass doesn’t scale with size, and in fact the most massive known star, r136a1, is actually a main sequence star I think
@@SEA That's what I thought! VY Canis Majoris and UY Scuti both do have mass estimates stated on Wikipedia though, 17±8 and 7-10 M☉ respectively, so I didn't get why Stephenson 2-18 gets a different treatment. Maybe because it's a lot farther away, making its interactions with other bodies a lot harder to measure?
I'm so glad I subscribed to your channel a while ago. This video reminds me why I did, and why I need to spend more time there. Brilliantly done. Truly a shining example of what 'astronomy for laymen' channels should be.
Damn, Stephenson 2-18 is a seriously chunky chunk! Love this content. Also, ''zone of avoidance'' sounds so cool! Also, also, does anyone know what's happening with Eta Carinae? I thought it was a potential supernova candidate?
Good God - I clicked on this expecting some UA-cam BS video full of dramatic music, exaggeration and dubious claims at best. Instead I found a true gem. Thank you :)
Hey Sea , I have been watching your videos for a pretty long amount of time and you never cease to amaze me. you always inspire me to become an astrophysicist and answer the questions about the universe that nobody has ever answered. Great content as always !
Our human life is privileged to learn these and know our position in the cosmos. On the other side, I feel this is information overload. Unable to comprehend many things out from one single video. I like it. 👍🏼
dbsti300 I went back and listened to that part three times to make sure that it stuck solid in my memory banks. I too find this astounding! We are soooo small in the big picture. Space science rocks!
@@TheGryxter We are nothing. I want us to be something in the grand scheme of things, but like Neil Degrasse Tyson said, " The universe is under no obligation to make sense to humans."
Excellent video! Not sure why but your voice is very soothing and relaxing to me. I'm fighting the urge to take a nap even though this content is very engaging lol
Listen, I'm 59 years old, am confidently intelligent and just you describing how a star is created has blown my mind. You are the first person to explain how this understanding why it ceases to explode.
Another truly amazing episode. This channel dwarfs others with it's content. Both informative and extremely interesting. Amazing. Keep up the good work
As a kid I loved how the universe works. As I got older I found that most of those shows and movies they’ve come out with since are extremely over simplified and repetitive, not going into detail about obvious questions because it might be to complicated for most. UA-camrs like your self do the research and scientists more justice.
It would be interesting to see whose style would win out in a collab between these two. Alex is so cheerful about the wonderful discoveries we make with our happy, plucky robots. SEA calmly describes these objects as violently indifferent inferno-monster time-bombs set to horror film soundscapes.
Can you imagine that if aliens existed somewhere out there, and these planets are visible, how much bigger would the Dyson Sphere planets(invisible or hardly visible) harvested by these aliens be, in order for them to ignore these "inefficient" ones?
Dyson Spheres sound cool and logical, but since time had marched in from the 60s they seem a relic of "bigger is better" era. The amount of material needed to make a Dyson Swarm insane; like more than the Asteroid Belt in materials insane. High energy outputs and longevity seem more likely to come from a Kugelblitz or a step before that like antimatter.
Haha, I almost died when you showed the lil' weiner dog as a representation of Canis Majoris. [15:49] Another legendary production, SEA. Your content is downright awesome. Thank you for sharing with us, as always... and keep up the amazing work!
absolutely love space. its always been a huge comfort for me. when i was 9, i thought vy canis majoris was the biggest star, and that it and uy scuti had a big rivalry, but seeing larger stars be introduced is such a nice topic. thank you for this informative video !
SEA is the best. I literally wait for his new videos. Science channel has turned into conspiracy theory channel and this is my galactic heroin fix that I so desperately crave. Don’t stop ever man.
Exceptional video! A lot of good insight into basic stellar mechanics. I usually find other cosmological concepts more interesting than stars themselves but this one had my attention all the way through!
At 4:03, we see an image of the star Pollux which, we are told, is 9 solar radii in diameter. But contained within is an image of 9 suns, so is that not 18 solar radii? Or is each circular image equivalent to just half a star? Things like this need to be explained to persons of limited understanding such as myself. Thank you. x
This is the first vid I have seen from the channel, very engaging! Please edit the solar radii explanation graphic at 4:05 to avoid any misconceptions. Thanks!
![Journey to the Andromeda Galaxy [4K]](http://i.ytimg.com/vi/-ybiXR2WCFQ/mqdefault.jpg)
![Journey to the Andromeda Galaxy [4K]](/img/tr.png)
![The Largest Black Holes [4K]](http://i.ytimg.com/vi/gIvGSW1Mlm8/mqdefault.jpg)
![Engine Black Holes [4K]](http://i.ytimg.com/vi/lLt9i1Z4Skw/mqdefault.jpg)
If you ever feel stressed remember there’s a very large Star out there named Steven who can barely hold himself together
he's literally me
Steven Segal? 😂
LOL
Stevenson
@@Schemez-16vhiphopbeatzSteve for short. 😊
This is one of the best science channels on UA-cam. As a 67yr old I still remember how things were before the internet and I believe this allows me to appreciate it more. If someone told me back then that everyone could access more or less the sum total of human knowledge and culture from a small box in your room I would have thought them mad!
For real. The effort he puts in his videos and the quality, are amazing. I grew up with early days of internet and this was a dream for us, to have this quality content h24.
Or a small box in your hand!
A 67 yrs old with a Lenin icon that also appreciates these videos? I feel like I’ve hit the lottery.
I’m 40 and completely agree. The advances and impact of technology over the past 25 years can only be compared to when man invented the wheel.
I am a lot younger than you but i remember before i had internet i had read every decent book at my local library it was miserable compared to how it is now.
3 years late. I once worked an aerospace systems manufacturing facility and my job was to measure luminance etc. on flight panels. 13:34 you explained in 10 seconds what took them 6 months of training to get me to understand. This is what makes good content creators just that
To be fair you already understood it so that 10 seconds just made sense to you. Maybe it wouldn't have clicked without that 6 months
@@mattb6646 agreed.
@@mattb6646it doesn’t to me lol😂
Still cannot believe this level of content is free. This shit is National Geographic or Space Attenborough quality.
Who told u it was free?
@@Ronyashmet520 Your mother.
@@Carodej.Dobrodej guess I gotta look u up.😈
@@Carodej.Dobrodej I'll see u soon martin.☠🤯🤬
You’re right. This content is so professional that it deserves more recognition like a Netflix series
It’s kinda disturbing to think that 100 years seems a long time to humans, but on a cosmic scale 100,000 years is equivalent to about “a blink of an eye”.
For me it's not disturbing but it really puts things into perspective, so I appreciate the time we are given much more.
Star Trek Voyager...
the time it takes for us to blink once is about 1/372,000,000th of a lifetime
100,000 years going by is about 1/72,000,000,000th of the universes current age
@@notxon300 yeah blinking is too long an analogy compared to our universe
For other species 100.000 years might be as 100 are for humans tho'
imagine being an almost incomprehensibly large star just to be called stephenson
Should've been Greg
@@CEO-of-money Greg Levine
Stephenson means son of Stephen... Where and how big is Stephen?
SERGEI!
I took Stephenson 2-18's numbers to a habitable zone calculator, and it gave me numbers like 630 AU - 1111 AU, which is a mind-boggling distance. Pluto is at its furthest at 49.3 AU, for a point of reference.
r136a1 is 5 light years habitability zone ( 315 times mass of the sun and 20 times radius )
Nerds rule.
Wooh
Does it differentiate between a hot main sequence and an ultra low density expanded star?
It would also take years just for a full rotation
If this is Stephenson, I'd hate to see Stephen...
😂
🤦🏽♂️🤦🏽♂️🤣
Hardy har har 😂😂
🤣🤣
i can't help but smile when for Canis Major, a freaking dachshund is used for comparison of the constellation lol
And 1 year later i was smiling about the dachshund and looking for another comment doing the same😂❤
I just can’t wait for the James Webb telescope
Event beyond imagination
Definitely!!!
I hope all goes well on launchday🙈🙈🙈
2027 let's gooo
@@aaronb1977 lol
..b..but mom says _I'm_ the biggest star.😔
Mom is always right. 😂
She lied 💀 🤧
@@JahonCross Does that mean I'm _not_ the most handsome young man in the world?
"my little stephenson 2-18
You are, carry on.🌞
I have watched many documentaries on the universe but still didn't know how stars are formed until this video came along. The explanation was easy enough to understand which is quite a challenge on it's own.
Quantum Physics is all this
This stuff interests me so much. I suck at mathematics, and I have a lot of trouble visualizing large numbers… But astronomy and cosmology is so fascinating. I just keep binging these videos. I appreciate all you do man!
Trust me: everyone has a hard time visualizing large numbers so don’t hold that against yourself!
@@Refrigerator44
I’ve since heard something that really helped me understand the vast difference between a million and a billion; a million seconds is 11.5 days, while a billion is nearly 32 YEARS. It’s mind blowing stuff!
@@JanoyCresvaZero Another fun way to see it is: the difference between a million and a billion is just about one billion.
Extremely relatable comment
@@BeeruzChryslerfair enough. You should go to very crowded places like a concert to know how many people there are and since they usually measure attendance it's pretty easy to verify. Or just watch videos but it's nothing like actually seeing it.
I have to give it to you man. I watch videos about stars, space, galaxies, universe In general and things alike. This is the most jam packed yet simplistic video ive seen. Its got a lot of info on stats yet its not overwhelming and is still understandable for someone who doesnt have an the first idea about stars. Bravo my friend, bravo. Thank you for this.
With a single video i havent even finished you gained my respect and made me like and sub.
I need you to know, that your videos are next level. Each and every fascinating film
has broadened my understanding of our universe immensely. Visually, each video is more elegant and beautiful than the next. Your narration is not only soothing to the ear, and poetic, but you’ve mastered the art of presenting these highly complex scientific concepts in a way that’s easily 😅understood by a simpleton like myself. I FINALLY FEEL LIKE I HAVE found my go to- FAVORITE channel on all things universe/space/etc
You're one of the few UA-cam channels in which I will not just purposefully set-aside time to do nothing but watch your video, but one of the fewer still in which I much prefer to make something of an evening of it ;D A meal, a drink and some SEA is a little slice of heaven.
"Seasons that last a millennia." Mind blown! This whole video was an absolute delight to watch, and I was in constant awe, not just of the scale of our universe, but of mankind's ability to decode so much of it and the methods they use. Thank you, thank you, thank you for this gem of a channel!
In for a long hard summer , hope air con doesn’t fail😞
Oh, you sweet summer child...
@@paulgibbon5991 ?
@@DrJones20 It was a "Game of Thrones" joke, the series set in a world that also has very long seasons.
"A millenia"??? How about "millenium"?
I know this is an older video, but this has been the absolute best space video I have ever seen. Everything is so well described, easy to understand and detailed.
Sea, you're fr my favourite youtuber, i have watched and rewatched pretty much all your vids, and i know this is a weird compliment, but putting on your vids when im tryna go to sleep helps like nothing else, so youve also fixed my sleeping schedule xd
Dude, same here. SEA rocks
I thought i was the only one.
Yepppp! Going down for a nap, and a new video is up? Gooood niiiight
I put on the ultimate space Playlist every night to go to sleep. Seriously love this channel so much
You are not the only one :)
Please never stop this endeavour SEA. I will watch you until the end. You are my favourite channel on UA-cam and there is no other channel which I keenly await videos for. Everything you do is awesome and every topic that you talk about is too. You are able to inject such an incredible amount of understandable science in, that your videos are unmatched in their viewing.
Your layman's descriptions of immensely complex topics are unparalleled. I can't thank you enough for all that you do, and I beg that you continue it, far into the future. I would love to contribute to you somehow. In any which way. Patreon, bank transfer. Hell, I'd write you a bloody check. For the amount of hours that I have watched your videos (every one of them numerous times) I owe you more than just pitiful Add revenue.
Please respond so we can work something out!!
-Jack from Dorset, UK
Join button next to subscribe button.
@@sirensynapse5603 get a life mate aha. Just paying respects to a content creator that I enjoy :))
@@CaptainJack246 I agree, he makes these videos so simple and easy to understand it's amazing
Thank you very much that’s very kind, I’m glad you like the videos 🙂 if you want to do something extra you can become a channel member! channel members get early video previews as well 🙂
@@SEA Done! Looking forward to early posts.
I find it fascinating that many of these stars could already be dead. Think for a moment, if a star is 10,000 light *years* away from us, we’re witnessing the star 10,000 years in the past
Erebus: And 10,000 years in cosmic time is VERY recent. We think the universe is well over a million times older than that.
Well, 10,000 light years is pretty damn far. On the scale of a star, not much happens in 10,000 years. Most stars that we think are "close" to death are still sometimes millions of years away from death, and if we were looking at a star 10,000 light years away, it would have to be at the very very end of its life for it to be gone by "now". But even the concept of "now" isnt very clear over vast distances like that. Its pretty hard to think about two events thousands of light years apart happening at the same "moment" so we just consider the light that reaches us to be "now". I love looking up at the stars at night, thinking about the journey the photons that are currently in my eyes must have taken. Some stars appearing as they were 5 years ago, some 30, some 100. What I find more interesting is that a lot of these photons took more time going from the core of the star to leaving it, than they took travelling across space to reach the earth. Honestly, space is just ridiculous. We have unimaginably tiny things making up unimaginably huge things, and here we are trying our best to observe it all. The farther out you think, the less everything makes sense.
@@DizzyFoShizzy Contrary to the meme, pretty much every star that is visible in the sky without a telescope should still exists.
Given how relatively close all the easily visible stars are, and even for the shortest-lived stars one or two thousand years really isn't much time, there's even a good chance that every star that you see when you look up still exists.
More definition please
that effect is why we can see so far into our universe's past. The most distant galaxies and stars tell us not what's there now, but what was there closest to the beginning.
Could you imagine being within a few hundred light years of these monsters? How big and bright they would appear at night?!
A frightening thought !
I think they'd be big and bright ALL the time. Hence no night. Yes, yes... what about when you're on the side of the planet facing away from the star? Well, I suspect the light would find a way to bend around the atmosphere so you'd never really be in the dark.
There would be day and then there would be DAY
I wonder how far away a planet would have to be from one of these stars to be in the habitable zone of it
Betelgeuse and Rigel are both really big stars a few hundred light years away. Sirius and Procyon are also quite big and only around 10 light years away. They are all among the 10 brightest stars in the sky, but still pale compared to Mars and Jupiter.
I would imagine Stephenson 2-18 from say 600 light years away to be a very similar sight to our brightest stars. But having it perhaps 20 light years away, I guess it could look as bright as Saturn or maybe even Jupiter.
The subject of your videos (space) is fascinating, of course, but what I find to be even more compelling is the way that you explain it. You are technical, but also eloquent. You use this kind of science to appeal to our emotions, and that makes it so much more memorable.
There is information about space all over the internet, but I watch your videos because of the delivery. Your narration, coupled with the content itself, is amazing.
I watch videos like these before bed so I can dream of space.
Dude your channel came out of no where but you are honestly one of the best astronomy channels on UA-cam. Keep up your good work man!
Really appreciate your patient introduction to the topical ‘main sequence’ before going full-on hypergiant with normally stupefying size comparisons. Top-shelf content, without question. Much gratitude from Canada; huge thank-you for the new content. 👍
Corn on the nose, not a good pose 😂
I just discovered your channel and have shown this to my 97 year old father. He also loves the fantastic content and presentation.
This has to be my best subscription on UA-cam yet. I just spent all weekend watching these nonstop until just now.
It’s Thursday.
This channel is probably the main reason for why I got into astronomy
You're the main reason I read UA-cam comments.
You're the main reason I read UA-cam comment replies.
You the reason I real UA-cam comment replies and replies
Why can’t all UA-cam science channels deliver content this crisp and clearly presented? Excellent production - thank you!
SEA always coming through with the discovery channel level of documentaries. Don't ever stop making vidoes man society NEEDS the kind of educational content you put out, and i thank you for it
They're past the Discovery Channel, there's nothing on cable any more except "reality" shows and a few science and history shows that are made for a 6th grade level.
SEA, your videos always help me fall asleep, you manage to make something that gives people existential dread so calming and soothing to watch and listen to.
Never stop, my dude.
eh? why the heck would this give you existential dread? how it is threatening your existence? man, you need to calm down, it's not that serious, bro.
I'm doing it right now.
In my bed, a bit high and rewashing videos.
And after 3-4 of them I'll sleep like a baby...
@@wesleyhempoli5548 I was going to say the same thing. I don't understand why this type of content makes people feel anxious. It actually brings me a sense of relief to actually get to sit down and watch something, and I feel relaxed. Learning about galaxies and how big stars are and stuff is cool to me, not really intimidating at all. It's interesting. My daughter doesn't like watching this channel or space rip because she thinks that the narrators both sound "scary" - but I think this one actually sounds kind of hot 😂 and Dick Rodstein over at Space Rip is great.
@@pantherofcarantania you must be high if you're rewashing videos 😁
@@Pugetwitch Hahaha!
Yes, I was...
Well absolute excellent video. Thank you. I watch videos all the time on U Tube and have watched tens of thousands probably over last 10 yrs or more. I mainly watch Astronomy and Space related videos and as someone who is massively into Astronomy I already knew a lot of whats in the video, but not all of it. However thats not why I am commenting. I just wanted to say thank you for such a brilliant,informative and superbly presented video. There was thankfully None of the Hideously Loud music, No Gimmiks and Cartoon like Flashing images, No Screaming loud voice and best of all no adverts. If only all Astronomy related videos on U Tube were like ours. Excellent. I immediately liked, and subscribed and will watch all your Astronomy related videos from now on. Thank you.
of all the crazy space shows ive seen , i’m grateful someone finally started their show with what you would think a space nerd like myself would have had a strong grasp on....how a star is made. every time it’s explained it’s explained in such a confusing manner. i learned a lot from this.
James Webb telescoop for sure gonna find larger red giant's and mindblowing planet's.
We have heard this Since 2016.
Almost we are dismayed😭
planets* - just a heads up. you never use an apostrophe for plurals, not even 90’s. it’s ‘90s
Tele Scoop
Maybe by 2050, sure
facts
The best way to fall asleep. I even made a “SEA to Sleep” playlist...
Imagine being able to fly to Stephenson 2-18. You park your Starship a few Kilometres from the star (just imagining for now, that the ship would be able to), and looking at a gigantic wall of fire with no end to be seen, no matter what direction you look...
I would love to see that.
The sun's closer
You need a good pair of sunglasses and lots of suncream...😎🤓
And a rly strong magnetic field.
@@anonymousviewer2165 The sun is closer than a few km?, so whe i see the sun at an 45degrees angle i only need to travel a few km to have it right above me?.
Actually, if you look along a line parallel to a tangent to the sun's circumference, you would see space, and not the star. While the star would take up a lot of the view in front of you, it would not be visible in whatever direction you look, assuming that you could restrict the brightness to a level that would allow for viewing.
I’m 46 and still so new to science. This channel is amazing. But even more amazing are the comments. Finally a channel where everyone is on one accord. I love it here. ❤
The scales of the universe are *_mind-blowing_*
Allahu akbar
@ozymandias nullifidian god isnt imaginary.. matter of fact science helps prove god exists in many cases
@@starkilla102 stop making shit up you just watched an episode of simpsons where homer proves theres a god
@@tixchicken i dont watch the simpsons?? Not it really matter im not gonna argue with a flat earther
@@starkilla102 gods are a catch all for stupid, fearful people. A stain on progress in every sense. God done did it.
The narrater is an absolute legend. The content is immaculate. The information and imagery is of the highest quality. I love it. I can't get enough of this channel. What a masterpiece.
A few years late, but this video is absolutely incredible. Being an astronomy nerd with no science background, some topics are difficult for me to comprehend, such as how stars work. Yet in just a few minutes watching your video, I learned what I’ve tried to so many times and gotten confused just fantastic
Been watching you since early 2016 and I just gotta say, your channel is still amazing to watch. So happy you grew away from GD and followed your ambitions. I can tell you love the topics you discuss and that you put in the effort. Can't wait to see you grow even more in the future man. Love ya
You and LEMMiNO make the perfect vibe with these videos
you...have good taste
@@letsgo_inc Damn straight he does
@@letsgo_inc There's also Nexpo, which is more focused on "horror" stuff.
@@mynickisnick8270.....Yeah, my ex-wife stars in a lot of Nexpo horror shorts!
very informative about the Hyper Giant stars and particularly Stephenson 2-18 ! Thanks for posting
Wonderful video! Thank you for nourishing my mind and imagination. You are one of the very best channels on UA-cam as far as I'm concerned. Always so happy when you post something new!
Extremely high quality content such as this is rare on UA-cam. Very well-produced, factually accurate and concise. Subscribed.
I'm someone who isn't even a space/cosmos person, and I also have subbed to SEA for a minute. Dude makes quality stuff.
Calm voice, clear English, informative. Great Job!
Honestly this Channel is amazing. I don’t know where you get you digital/visuals from but it looks amazing. Also, the soft, distant drone like music goes perfectly with your voice over, and adds a remarkable sense of desolation.
Best of luck in your efforts. I’ll keep coming back to watch!
Thank you so much! If you want to know about visuals, I make them in a program called Space Engine which is available on steam. It’s really cool, it’s a full virtual universe simulator which allows for graphics like that so I would highly highly recommend it if you like this sort of stuff 🙂
@@SEA......I certainly didn't expect "really cool" from the SEA man!.....but it's cool!
It’s awesome seeing VY Canis Majoris being given considerable mention. It’s the star that got me into astronomy all the way back in 4th grade so I have a special love for the star.
That is really interesting because same here actually! When I was in year 7 (6th grade I think that is) we watched a video in school about the largest stars and it was one of those ones where it just kept zooming out. It really got me interested in the subject.
@@SEA That’s awesome! It’s amazing how something as simple as an extraordinary object such as this can lead to scientific interest.
@@SEA also I just noticed you have a Twitter, I just followed you
Same for me! I found it in universe sandbox as a 2nd or 3rd grader and I’ve been into space ever since!
Incredible video! It is a shame that I have discovered your channel now. But people say: "better late than never". Thank you for the effort to make such a masterpiece and it is for free. To all of us!
This whole video was absolutely mesmerising, the scale of the cosmos is truly mind blowing.
That's just our galaxy alone.
What if most of it's an impossible optical illusion? A system that acts a certain way when studied?
I just found your channel yesterday, and I've already watched just about every single space video. I think I'm gonna end up watching these again and again, the visuals and the way you make such complex information accessible is extremely unique.
Thank you so much for these
its weird. Once you start learning about space and stars and planets and everything else involved, you don't look at things the same anymore. Space is fascinating and terrifying.
Yes SEA, I could listen to you narrate film for hours. Another "Stellar" video ! Yes, the info in this video is mind blowing, but once again, I don't think any of this video went over anyone's head, so to speak. Well Done. Again.
This is so well explained, watched this video about 5 times. Agree with the Attenborough comment and it's nice to hear the Essex accent and the informal expressions, makes it easier to concentrate on the info. Very enjoyable watch 👍
I find this fascinating as hell!! I love learning about space and stars and all the things involved. Simply unimaginable sized stars!
I imagine that having two similar space telescopes at the same orbit, but at opposite sides, would be pretty useful for astronomers.
@danijelovskikanal7017why would they? If they're traveling at the same speed it's fine. They would hopefully have enough fuel to adjust for changes in speed compared to each other if it somehow changes.
How is that outside the realms of possibility?
Great video! I particularly appreciate that you spent the first 15 minutes on background and methodology instead of jumping straight to the list - it really puts the measurements into perspective and makes it a lot easier for us scientifically-minded laypeople to appreciate them :^)
I tried looking up the mass of Stephenson 2-18 but couldn't find anything online, not even an estimate or an explanation of why there is no mass estimate. Do you know anything about its estimated mass? or about why its mass can't be estimated? Cheers from Sweden
Thanks, glad you like it :) I’m not sure what Stephenson 2-18’s mass is, but I think scientists don’t really bother with red supergiant mass because it’s a lot less than you might expect. Most red giants and supergiants eject most of their mass and become much less dense when they exit the main sequence. I remember reading that one of the largest is only 10 solar masses. The mass doesn’t scale with size, and in fact the most massive known star, r136a1, is actually a main sequence star I think
@@SEA That's what I thought! VY Canis Majoris and UY Scuti both do have mass estimates stated on Wikipedia though,
17±8 and 7-10 M☉ respectively, so I didn't get why Stephenson 2-18 gets a different treatment. Maybe because it's a lot farther away, making its interactions with other bodies a lot harder to measure?
@@elleboman8465 Stephenson 2-18's mass is around 40 solar masses I think.
I'm so glad I subscribed to your channel a while ago. This video reminds me why I did, and why I need to spend more time there.
Brilliantly done. Truly a shining example of what 'astronomy for laymen' channels should be.
The intro and soundtrack gets better everytime. 🤩
Would love to see you collaborate with Astrum on something about the Perseverance mission
Gotta love the way gravity keeps slapping entropy in the face all day...
Damn, Stephenson 2-18 is a seriously chunky chunk! Love this content. Also, ''zone of avoidance'' sounds so cool! Also, also, does anyone know what's happening with Eta Carinae? I thought it was a potential supernova candidate?
Hush babe
@@bigzach7778 No you
@@DrJones20 hush up too
@@bigzach7778 Lol, what a random lunatic
@@DrJones20 when I say hush u hush!!!
Good God - I clicked on this expecting some UA-cam BS video full of dramatic music, exaggeration and dubious claims at best. Instead I found a true gem. Thank you :)
I ran to the comments just to say this is easily one of the best explanations regarding star formation and size across its lifetime I’ve ever seen.
Hey Sea , I have been watching your videos for a pretty long amount of time and you never cease to amaze me. you always inspire me to become an astrophysicist and answer the questions about the universe that nobody has ever answered. Great content as always !
I've been binge listening to your videos for the last couple of days now, in-between college studies, and I'm so glad I've found you! Keep it up! :D
It really helps impress science teachers and other students with this knowledge
This channel is absolutely fascinating and the BEST when you need to fall asleep fast.
Our human life is privileged to learn these and know our position in the cosmos.
On the other side, I feel this is information overload.
Unable to comprehend many things out from one single video.
I like it. 👍🏼
The photons take 7 hours to travel UY's circumference. That blows my mind.
dbsti300 I went back and listened to that part three times to make sure that it stuck solid in my memory banks. I too find this astounding! We are soooo small in the big picture. Space science rocks!
@@TheGryxter We are nothing. I want us to be something in the grand scheme of things, but like Neil Degrasse Tyson said, " The universe is under no obligation to make sense to humans."
I think he meant radius.
@@TheGryxter and its even more mind blowing that we are bigger than the smallest things out there than the universe is bigger than us..
@@atanasapostolov2731 ? We only know of organisms on planet earth, and about a good chunk of our planet is still undiscovered
Excellent video! Not sure why but your voice is very soothing and relaxing to me. I'm fighting the urge to take a nap even though this content is very engaging lol
Listen, I'm 59 years old, am confidently intelligent and just you describing how a star is created has blown my mind. You are the first person to explain how this understanding why it ceases to explode.
That was awesome. Thank you for this well rounded compilation of large stars.
Just remember this: there is always a bigger fish.
good video :) love the channel i listen to the playlist daily while working at my boring factory job making castors and wheels.
Another truly amazing episode. This channel dwarfs others with it's content. Both informative and extremely interesting. Amazing. Keep up the good work
You might say it's the Stephenson 2-18 of astronomy channels.
I love sea so much. Thank you for making my life better
As a kid I loved how the universe works. As I got older I found that most of those shows and movies they’ve come out with since are extremely over simplified and repetitive, not going into detail about obvious questions because it might be to complicated for most. UA-camrs like your self do the research and scientists more justice.
Interstellar was good at least
So when is the collab with Astrum going to happen? Would seriously make my day seeing you 2 put out a mini doco on something.
It would be interesting to see whose style would win out in a collab between these two. Alex is so cheerful about the wonderful discoveries we make with our happy, plucky robots. SEA calmly describes these objects as violently indifferent inferno-monster time-bombs set to horror film soundscapes.
0:35 Stephenson 2-18 is a "oh lawd he comin' star 🌟
I like how you use Spaceengine for most of the illustrations
Can you imagine that if aliens existed somewhere out there, and these planets are visible, how much bigger would the Dyson Sphere planets(invisible or hardly visible) harvested by these aliens be, in order for them to ignore these "inefficient" ones?
Dyson Spheres sound cool and logical, but since time had marched in from the 60s they seem a relic of "bigger is better" era. The amount of material needed to make a Dyson Swarm insane; like more than the Asteroid Belt in materials insane. High energy outputs and longevity seem more likely to come from a Kugelblitz or a step before that like antimatter.
Haha, I almost died when you showed the lil' weiner dog as a representation of Canis Majoris. [15:49]
Another legendary production, SEA. Your content is downright awesome. Thank you for sharing with us, as always... and keep up the amazing work!
0:37 that is such an amazing scene comparison
Here we go guys. Another banger from the guy 🚀🛰
0:24 a star as big as Jupiter's orbit around the sun, it may take a couple of minutes for me to process this so bear with me.
It makes me boundlessly happy to learn that the largest known star's name is Steve.
absolutely love space. its always been a huge comfort for me. when i was 9, i thought vy canis majoris was the biggest star, and that it and uy scuti had a big rivalry, but seeing larger stars be introduced is such a nice topic. thank you for this informative video !
SEA is the best. I literally wait for his new videos. Science channel has turned into conspiracy theory channel and this is my galactic heroin fix that I so desperately crave. Don’t stop ever man.
I’ve learned so much by the first 5 min than my 1 year of watching other videos on stars. They don’t go into detail like this 👍
This channel never stops to amaze me.
Amazing content!
Am I the only one who falls asleep to these kind of videos?
Yes and no, they don't put me to sleep during the day but come night...
This is nightmare fuel.
@@techbrain8714 I just fall asleep knowing Im nothing but a dust and my problems don't matter
Exceptional video! A lot of good insight into basic stellar mechanics. I usually find other cosmological concepts more interesting than stars themselves but this one had my attention all the way through!
WEBB LAUNCHED TODAY!
Babe wake up SEA uploaded
At 4:03, we see an image of the star Pollux which, we are told, is 9 solar radii in diameter. But contained within is an image of 9 suns, so is that not 18 solar radii? Or is each circular image equivalent to just half a star? Things like this need to be explained to persons of limited understanding such as myself. Thank you. x
I like to watch one of these videos before I sleep and then I dream of drifting through space in a dystopian Unreal Tournament like universe.
Shared with my science class
This is the first vid I have seen from the channel, very engaging! Please edit the solar radii explanation graphic at 4:05 to avoid any misconceptions. Thanks!
Daddy SEA uploads new video.. Time to roll a joint