The Largest Star in the Universe - Size Comparison

Birt 22 sep 2020
We created our first app ‘Universe in a Nutshell’, together with Tim Urban of Wait but Why!
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Sources & further reading:
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Video on Red Dwarfs:
What is the largest star in the Universe? And why is it that large? And what ARE stars anyway?
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  • We created our first app ‘Universe in a Nutshell’, together with Tim Urban of Wait but Why! You can get it here: Appstore: Google Playstore: Oh boy. Making an app is hard. It seemed so easy when we started. We underestimated the necessary work load and all the potential problems tenfold - this is not a figure of speech, this took ten times longer than we thought it would. And we are sort of used to working on big projects. So the first update to the app should hopefully be here in the next 24 hours (we are waiting for approval of the update in the app stores) - it will fix a bunch of small things that slipped through. We’ll constantly improve this thing because while it was honestly a horrible nightmare to make, it also was fun and we want to get better at it and make more things in the future. In case you don’t know Wait but Why btw, it is the best and most fun blog on the internet ( and if you don’t know it you should change that like right now. Tim and I collaborated for the first time in 2013 and we have been good friends ever since. And this thing was something we started talking about years ago. So what is this thing we made and why? You can seamlessly travel from the smallest things in existence, past the coronavirus, human cells and dinosaurs all the way to the largest stars and galaxies and marvel at the whole observable universe. You can learn more about each object or simply enjoy the sheer scale of it all. It’s a fun plaything. The app is inspired by the “scale of the universe” website by the Huang Twins that Tim and I spent a lot of time with when it came out years ago - and felt that it was finally time to create a Wait but Why and Kurzgesagt version. There are no in-app purchases and no ads. All future updates are included! Since this is our first app we would love to hear your feedback so we can improve it over time. Leave us a five star review if you want to support it. Kurzgesagt and all the projects we do are mostly funded by viewers like you. So if you like the app we’ll make more digital things in future! Ok! Thank you for reading - Philipp

    • R.c

    • You forgot about UY scuti

    • can you make it for free

    • Add Uranus, UY Scuti, Sirius, Laniakea Supercluster, Eta Carinae, Rigel, and make this app free.

    • Add Uranus, UY Scuti, Sirius, Eta Carinae, Rigel, and make this app free.

  • Hey turkish language is too late and not clearly we want watch kurzgesagt too

  • sirius A:haha i'm big b centauri:rlly im bigger than you bro r136a1:dont tell me that your bigger than me xd gacrux:im BIGGER >:( pistol star:wdym im bigger than you :| rho cassiopeiae:IM BIGGER stephenson 2-18:im the biggest star :-)

  • 2:30 “They are small and not very hot” That’s kind of relatable

  • Have you ever realized that the unstoppable marching of time that is slowly guiding us all towards an inevitable death?

  • You forgot to mention orange dwarfs

  • We don't have to hate on kurtzgesaught. He did is best at explaining things

  • I'm starting to lose my respect to the Sun, he was just showing off to us, but he's not in the big league lulz.

  • "Failed stars, that are a huge disappointment to their *moms*" Rip brown dwarf.

  • Subtitles doesnt work.

  • Why can I relate so much with the brown dwarf?

  • You forgot about UY scuti

  • and YT Canis Mayoris?

  • Stars are kinda like Pheonix's, aren't they? They both have to do with fire/heat etc, and are reborn from their ashes.

  • Anyone else yelling where’s uy scuti?

  • IN A Nutshell is current my favorite channel

  • i have seen the last scene of the stars so many times, i just love it

  • Ton 618 OPPPP

  • From now on I identify as a brown dwarf.

  • UY Scuti has been kinda forgotten, now that stephenson is even bigger, huh ^^

  • I’m just gonna leave with a holy crap

  • I'm brown....and I'm short...I got an F... *Am I a disappointment too-?*

  • No entender greengo .

  • Thats fucking crazy im so stressed out now knowing our earth and everything else in its radius is gonna be completely evaporated cant even imagine how its gonna look when everything dies off from it being burnt i knew i wasnt trippn when its started getting so hot during summer i knew the weather used to be different back in 2000

  • UY Scuti be like: y u no let me in?

  • LOL Another fairy tale channel for adults. Did anyone notice it's all cartoon, a CGI. lmfao The only thing that went into "outer space" is human imagination. You poor gullible globetards.

  • where is UY Scutai?

  • Stephenson 2-18's volume is about 10 billion times bigger than Sun's, but it's mass is not accurately known. Let's assume it's 40 times bigger than our Sun's: That would mean that it's average density is over 200000 lower than Earth's atmosphere at sea level. We also know that the core of star is a lot more denser than other parts so this star is incredibly empty. It would be fun to have a space ship such as "Destiny" from Stargate Universe and observe star like this from very close distance..or from within the star it self.

  • This video, all of it, regards to internal stuff in its bodies of planets and suns is BULLSHIT science. The sun does not have a hot core, same with all the rest of the stars and the planets. The sun is cold in the center and is heated from the outside and in. Give me evidence that the sun is hot in the center, oh no, u can't give me, because the sun is cold in the center.

  • *When u realize that a star is bigger than a super big black hole*

  • Kurzgegsagt talking about how our sun will become 200 times larger and swallow our planet --- And if you think that's impressive. NO IT ISNT AAAAA

  • Can this channel please draw at least our sun with its actual color.

  • How to start a fight: 1. Comment 2. Wait

  • My brain right now💀

  • new champ biggest star = uy scuti

  • Echt heftig der größte Stern im gesamten Universum würde bis nach Pluto reichen

  • 4:57 how to diet

  • But what about UY SCUTI?

  • I'd say the most shocking thing in this video was when Stephenson 2-18 was put into our solar system for reference. I had no idea that our solar system was that big, I'm absolutely baffled.

  • Do red hyper not become black holes?

  • 5:51 "to make the biggest star, we have to kil them!" so we need to make the hugest nebula????

  • Never felt more irrelevant in my life. Thanks Kurzgesagt.

  • Excellent presentation!

  • My 1 wish is to have the real world have the graphics of Kurzgesagt videos

  • plz make korean subs:(

  • Me then: Kurzgesagt video is so well-designed, it couldn't get any better! Me now: It seemed that I was wrong.


  • Uy scuty is the biggest

  • Been using the app almost daily and I can say that it's one of the best apps for toilet scrolling. No adds, no interruptions. Just a fun app for like $2.

  • Why not land on the sun at night? smh

  • Yo, why he roasted the shit outta brown dwarfs?

  • UY sucti is legendary

  • Dt

  • Xh


  • Some physicist/cosmologist made a crazy discovery recently, that the universe existed before the Big bang. And my dad has a theory, that it was a hypermassive black hole so dense, it just had to explode.

    • Well, it is a possibility, but we don't know for sure.

  • I feel bad for brown dwarfs now.

  • Kurtz:S 2-18 *sad UY Scuti noises*

  • it looks beautiful

  • "this means they're rare, and short lived." That seems right on how I would describe my brother.

  • 哦看 才哦哦咯

  • The animation is so good, like Jesus Christ lol

  • Fake...all speculation.

    • If it's fake, then it is wrong, and not speculation. If it's speculation, then it might be right, and you can't call it fake. Funny.

  • Will you make a video about how stars are blue red or yellow.

  • The Universe is useless against virus even planet as big as Jupiter the whole planet will fucking quarantine

  • اللغه العربيه لا تعمل يرجى الاصلاح ارجوك

  • Vro give quasi stars some credit

  • UY scuti Is biggest star

  • love your app its so helpful

  • What if the entire universe is an atom in another universe.

  • brown dwarf be like 'even though i am a kid, my age is beyond your understanding (1 trillion years)

  • I feel bad for brown dwarves now

  • nooooo brown dwarfs i like you you are not dissapointment, nooooo

  • Who downvoted this?

  • This looked interesting until the age demographic it aims at is around 3.

  • Those are cool

  • Brilliant

  • *0:42* your a mean youtuber >:(

  • Forget it I deal witthis cool

  • 5:10 R136a1 : i have the rarest formation that few stars can do! sun : do you have living organism? R136a1 : umm no....?

  • Earth be like


  • If God can create planet destroying, red monstrosities, we can only shake in horror as we imagine what hell🔥 must be like! 😫😬😵😣🙏

  • Why you being so rough on these poor brown stars?

  • but nobody is banneutron star

  • brown dwarf:am i a joke to you?

  • Brown dwarf i felt that

  • do you know "Arsy Allah"?

  • Add Uranus, UY Scuti, Sirius, Laniakea Supercluster, Eta Carinae, Rigel, and make this app free.

  • Add Uranus, UY Scuti, Sirius, Eta Carinae, and make this app free. Fixes more bugs.

  • Why does your game cost money daaaaaaa!

  • Conclusion: There are better size comparison videos out there

  • i sent this to my friend and she said “im just tryna be a red hyper giant but im a brown dwarf”

  • Ma la volete smettere di dire cagate?

  • The animations on this channel are beautiful!

  • Damn, they really just roasted a brown dwarf.

  • 9:49 "Its a girl!"

  • rice compared to stephenson Summary: You're tiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiny

  • "Outer space" is a ruse. Next.

  • wow you really didn't have to do the brown dwarf like that

    • Imagine planets the size of our sun or even bigger,the lifeforms if they exist on that planets would be 1000times bigger than us and we would literally be microscopic to them