What Happens If A Star Explodes Near The Earth?

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People have witnessed supernovae for millennia, but what threat do they pose to life on Earth? This video is sponsored by Brilliant. You can get started for free, or the first 200 people to sign up via brilliant.org/veritasium get 20% off a yearly subscription.
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A massive thanks to Prof. Hans-Thomas Janka for helping us with the physics of supernovae and GRBs. A massive thanks to Prof. Brian Thomas for all of his help with the terrestrial effects of supernovae and GRBs. This video would not have been possible without them. Also thanks to Dr. Luke Barnes for his initial help with the literature search.
Hydrogen bomb vs Supernova fact was taken from this great article by xkcd/Randall Munroe - what-if.xkcd.com/73/ (based on the calculation by Andrew Karam, 2002)
Cosmic bubble footage from
www.cfa.harvard.edu/news/1000...
Neutrino driven SN explosion simulations from iopscience.iop.org/article/10...
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References:
Melott, A. et al. (2019). Hypothesis: Muon radiation dose and marine megafaunal extinction at the End-Pliocene supernova. Astrobiology, 19(6), 825-830. - ve42.co/Melott1
Thomas, B. C. et al. (2016). Terrestrial effects of nearby supernovae in the early Pleistocene. The Astrophysical Journal Letters, 826(1), L3 - ve42.co/Thomas1
Melott, A. L., & Thomas, B. C. (2019). From cosmic explosions to terrestrial fires?. The Journal of Geology, 127(4), 475-481. - ve42.co/Melott2
Fields, B. et al. (2019). Near-Earth supernova explosions: Evidence, implications, and opportunities. arXiv preprint arXiv:1903.04589. - ve42.co/Fields1
Thomas, B. C., Atri, D., & Melott, A. L. (2021). Gamma-ray bursts: not so much deadlier than we thought. Monthly Notices of the Royal Astronomical Society, 500(2), 1970-1973. - ve42.co/Thomas2
Melott, A. et al. (2004). Did a gamma-ray burst initiate the late Ordovician mass extinction?. International Journal of Astrobiology, 3(1), 55-61. - ve42.co/Melott3
Firestone, R. B. (2014). Observation of 23 supernovae that exploded less than 300 pc from Earth during the past 300 kyr. The Astrophysical Journal, 789(1), 29. - ve42.co/firestone1
Janka, H. T. (2017). Neutrino emission from supernovae. arXiv preprint arXiv:1702.08713. - ve42.co/Janka1
Janka, H. T., & Hillebrandt, W. (1989). Neutrino emission from type II supernovae-an analysis of the spectra. Astronomy and astrophysics, 224, 49-56. - ve42.co/Janka2
Janka, H. T. (2017). Neutrino-driven explosions. arXiv preprint arXiv:1702.08825. - ve42.co/Janka3
Karam, P. A. (2002). Gamma and neutrino radiation dose from gamma ray bursts and nearby supernovae. Health physics, 82(4), 491-499. - ve42.co/Karam1
Melott, A. L., Thomas, et al.. (2017). A supernova at 50 pc: effects on the Earth's atmosphere and biota. The Astrophysical Journal, 840(2), 105. - ve42.co/Melott4
Ludwig, P., et al. (2016). Time-resolved 2-million-year-old supernova activity discovered in Earth’s microfossil record. Proceedings of the National Academy of Sciences, 113(33), 9232-9237. - ve42.co/Ludwig1
Gritschneder, et al. (2011). The supernova triggered formation and enrichment of our solar system. The Astrophysical Journal, 745(1), 22. - ve42.co/Gritschneder1
Motizuki, Y., Takahashi, et al. (2009). An Antarctic ice core recording both supernovae and solar cycles. arXiv preprint arXiv:0902.3446. - ve42.co/Motizuki
Zucker, C. et al. (2022). Star formation near the Sun is driven by expansion of the Local Bubble. Nature, 601(7893), 334-337. - ve42.co/Zucker1
Hirata, K. et al.(1987). Observation of a neutrino burst from the supernova SN1987A. - ve42.co/Hirata1
Hayes, L. A., & Gallagher, P. T. (2022). A Significant Sudden Ionospheric Disturbance Associated with Gamma-Ray Burst GRB 221009A. Research Notes of the AAS, 6(10), 222.
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Special thanks to our Patron supporters:
James Sanger, Louis Lebbos, Elliot Miller, Brian Busbee, Jerome Barakos M.D., Amadeo Bee, TTST, Balkrishna Heroor, Chris LaClair, John H. Austin, Jr., OnlineBookClub.org, Matthew Gonzalez, Eric Sexton, John Kiehl, Diffbot, Gnare, Dave Kircher, Burt Humburg, Blake Byers, Evgeny Skvortsov, Meekay, Bill Linder, Paul Peijzel, Josh Hibschman, Mac Malkawi, Mike Schneider, John Bauer, jim buckmaster, Juan Benet, Sunil Nagaraj, Richard Sundvall, Lee Redden, Stephen Wilcox, Marinus Kuivenhoven, Michael Krugman, Cy 'kkm' K'Nelson, Sam Lutfi
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Written by Petr Lebedev & Derek Muller
Edited by Fabio Albertelli
Animation by Fabio Albertelli, Jakub Misiek, Alex Drakoulis, Ivy Tello, Mike Radjabov, and Charlie Davies
Filmed by Derek Muller
Additional Research by Kovi Rose & Katie Barnshaw
Video/photos supplied by NASA, ESA, Pond5, and Getty Images
Music from Epidemic Sound & Jonny Hyman
Produced by Derek Muller, Petr Lebedev, and Emily Zhang

Опубликовано:

14 ноя 2022

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Комментарии : 8 тыс.

@mayochupenjoyer Год назад

i’m extremely proud of the way my dad explained supernovae to me when i was about 5. he told me to put my hands out, facing each other, and then he put his hands on mine. he then told me to push outwards, as hard as i can, while he pushed inwards, which made my hands collapse. he said that when a star wasn’t strong enough anymore then gravity won. now that i’m older, i’m really enjoying this more comprehensive explanation

@rivendoto Год назад

that is really cool

@KeefyGizzle Год назад

You had an uncommonly cool dad...

@eirikdegard4498 Год назад

Thanks I will explain it like this to my children 😊

@masterludovicus802 Год назад

Your dad is amazing ❤️

@ConnoisseurOfExistence Год назад

I'm very glad that my parents were telling me about black holes when I was about 4...

@brunosimoes6405 Год назад

I've already seen dozens of videos on RU-vid about how a Supernova works, but this is another level. A complete and very well illustrated lesson in under 20 minutes. Veritasium never disappoints.

@starnutron6147 Год назад

@Don't Read My Profile Photo ok

@thewhitedeath3564 Год назад

@@lloyds7828 nice joke

@TheFirstBubbaBong Год назад

Ok don’t read your profile pic. Got it. Thanks for the warning bro.

@TheFirstBubbaBong Год назад

Yeah but what the real scientists are talking about a 12k year cyclical micro nova not a supper nova. You know this fact but seeing how you are a shill for the NWO agenda21 we get this nonsense. TALK ABOUT THE MICRO NOVA CYCLE NASA DISCOVERED IN THE 60’s. Talk about how it is predicted to happen again in 2043. Talk about how climate change can be explained by earths magnetic field weakening while the suns energy is ramping up to maximum. Talk about how we should be preparing for this next biblical coming that we have been warned about in every Bible on the planet.

@EnerJetix Год назад

@@lloyds7828 ah yes, and pigs fly as well :)

@roballegar Год назад

Your videos are thought-provoking, well-produced, and fun to watch. Thanks for making such great content.

@Florragonis Год назад

Wow! Thats serious dedication, donating 50 dollars for this dude. Seriously, he does deserve it.

@Florragonis Год назад

@@dot1298Thats some *serious* dedication there, too! I wonder if Ukraine will win the war, let’s wait and see. Time flies, and it will be a long one.

@nachovarga8506 Год назад

@@dot1298 this was not the time or place for this comment. He may have already donated for Ukraine. You don't know that.

@world-trade-center1 Год назад

@@dot1298 I haven't been following up on the war much but I am damn sure that they are good off. The US has given practically it's lung to the country; I'm sure the UN is probably helping; and there are so many donations and even some organizations relocating families out of the warzone. This feels pretty petty to comment. How about you donate there? Or how about you donate to homeless women and children? Or how about you donate to cancer treatment? Or Children's hospitals? Or to schools that don't have proper funding? Or to the residents in the Ohio Train Derailment? You get what I'm saying now? Honestly this comment I felt was disrespectful. People can donate to whatever they want; whenever they want; however they want. That's it. If you believe someone should've donated with THEIR money; you can instead with your own money. And before you even question me; no I did not donate anything. Period.

@BlijfEric Год назад

@@world-trade-center1 even though you're just another commentator; well said!

@joythought Год назад

I was surprised a few years ago to learn that gold and heavier elements are unlikely to be created in a standard supernova but require a more extreme ultranova or similar event such as star collisions to produce special elements like gold. That just adds to how lucky we are to have such abundance of uranium, gold, etc on our planet.

@sathanyam2193 10 месяцев назад

Actually fission stops at nickel not iron. It's a myth that iron is the most stable element, but nickel is more stable

@chrisrace744 9 месяцев назад

Regular super nova make gold and lots of other stuff. hypernova make black holes from which nothing escapes.

@maximuszastrow9961 8 месяцев назад

It's almost like somebody did that intentionally Genesis 1:1

@averageracistperson525 8 месяцев назад

I also learned a few years ago somewhere that the earth and the solar system formed from an ultranova, the collision between neutron stars. that was actually incredibly fascinating to me to know that everything that exists around me right now used to be a bunch of neutron star matter

@ProfAzimov 7 месяцев назад

@@sathanyam2193 *Fusion

@abiezerrosario2309 Год назад

Whenever I watch an almost 20 minute long Veritasium video, I never lose interest throughout the video and it's consistently gets my attention. The pacing of him talking quickly and pausing to make a transition makes it easier to retain the information. Also his voice is very clear and comprehensible. As always amazing stuff Veritasium, you never fail to get my attention.

@MissionHomeowner Год назад

You expained this clearly yourself.

@PeterDB90 Год назад

Him and Vsauce are my favorite RU-vid learning channels. Veritasium seems more "normal" interesting while Vsauce keeps your attention by being "weird" interesting.

@ilona3630 Год назад

Also great choice of background music

@michaelharris8913 Год назад

couldn't agree more very well put :)

@tarrare337 Год назад

@@PeterDB90 i like watching thoughty2 also

@Pdt7484 Год назад

The connection between astronomy, historic man, and palaeontology as a whole was absolutely mind opening. It is this reason this channel is one of the best channels on RU-vid

@tuneboyz5634 Год назад

That's right lil Jacob 😊

@youareaclown724 Год назад

SUPERNOVA! SUPERNOVA! SUPERNOVA GOES POP!

@timvw01 Год назад

They follow the Cosmos format, very good show

@imaadrasool7471 Год назад

Im i agree

@marcelofesta1290 Год назад

exatamente, q video gostoso

@renosance8941 Год назад

I'm left in awe at the explanation of how some tiny, tiny, weightless, harmless Neutrino... detonates the largest bombs in the known Universe. Just amazing how super-large events can have the smallest origins. Love this. Thank you.

@shaansingh6048 4 месяца назад

well when you've got 10^58 of anything it's gonna be pretty huge

@tup4443 3 месяца назад

I'm shure you can make a metaphor for capitalism about this

@nicolemitchell737 18 дней назад

I'm an undergraduate student majoring in Astrophysics and Planetary Geology. Thank you SO much for this video and your sources, one of my professors was looking into an extinction event and I was curious as well. This has given me a starting place on research to piece things together! While I was pondering on possibilities I remembered this video. Veritasium, you are doing an amazing job with your channel. I have sent many of your videos to friends to help explain concepts, they always love your content too!

@kevinarmstrong478 Год назад

This guy has that enthusiasm it’s like he is as amazed as his viewers. Like he’s not teaching or lecturing he is shearing information. I adore everything he does!

@FRACTUREDFUNGI Год назад

okay 👌 what i can i think 💭 would have been a little bit longer but if i can go on a break and i just make a new thing and it is fine too so much more like 👍 but it looks better and it will just keep you in touch and be 😅😅

@animeshjain8932 Год назад

How does neon fuse into oxygen (at 3:54) Neon(Atomic no 10) is heavier than oxygen (Atomic no 8)

@semaj_5022 Год назад

What the hell are these replies ?

@ohyeahohyeahooooh Год назад

The sun is a converter , stop misleading folk .repent before .. ...

@FRACTUREDFUNGI Год назад

@@semaj_5022 gamair!!!! 😙🤪 everything looks like it is pretty cool but it is kinda like the green brown green green bell bell brown brown eyes green green brown green green blue green brown green green bell 🛎 orange 🍊 bell 🛎 orange 🍊 tan tan orange 🍊 orange 🍊 tan green bell 🛎 orange 🍊 tan green bell 🔔 orange 🍊 green green brown green bell bell brown brown green green brown brown eyes green green bell 🛎 orange 🍊 tan tan orange green brown green bell bell 🛎 orange 🍊 tan green green brown green bell bell brown brown eyes 👀 tan green bell 🛎 bell 🛎

@luxhyashah8190 Год назад

Last year, I almost joined the Brian fields research group after listening to his presentation on this topic. He talked about how they had to look through sediment samples to find traces of Fe-60. I thought it was so cool that we could learn so much about the history of our cosmic neighbourhood just by observing earth. It's amazing to see this topic explained so well.

@Mike98006 Год назад

It doesn't happen "just by observing earth". It's actually a lot of different scientific disciplines coming together to understand what we're looking at. This is even more impressive than you make it sound.

@kimpeater1 Год назад

Where there's a will, there is a way! - Humanity

@NoNameAtAll2 Год назад

why almost?

@Call_Upon_YAH Год назад

Jesus Christ is the propitiation for the whole world's sins. They that believeth and are baptized (with the Holy Spirit) shall be saved; but they that believeth not shall be damned. Those led by the Holy Spirit do not abide in wickedness. *God is ONE manifesting himself as THREE;* the Father, the Son, and the Holy Spirit! Bless him! *For these three are one.* As I am led by the Holy Spirit, nothing I state is a lie, but the truth of God. Anyone who tells you differently is misinformed or a liar. They do not know God, nor led by him. Anyone who *claims* to be a Christian and is against what I am doing, and where I am doing it; the Holy Spirit does not dwell within them, they lack understanding. They know not God, read his word, and their religion is in vain. Do not hear them, they will mislead you, the lost cannot guide the lost.

@Call_Upon_YAH Год назад

When you trust in God and cast your cares (worries, anxiety, depression, suicidal thoughts) upon him, they will be NO MORE! Know that there is power in the name Jesus Christ! His name casts out demons and heals! The world is wicked, evil, and of the devil. I too, was a wicked sinner of the world before I opened my heart to God. I am living proof of God's work and fruitfulness! He is an active God who hears the prayers of his! God's children are set apart (holy) and righteous. The devil is a liar that comes to steal, to kill, and to destroy; that includes your relationship with God! Open your heart to God, repent of your sins (he will forgive you), and let him direct your path. Draw nigh to God, and he will draw nigh to you. Cleanse your hands and purify your heart, lest you walk with the devil and follow him to hell.

@kalcongdon17 3 месяца назад

You just explained this better than anyone I've ever heard or watched😮. Well done! Mad it make sense

@saltedcod3533 11 месяцев назад

This was such a ridiculously interesting episode! I didn’t understand half of it, but it was so exciting to learn all these new things.

@ratsalad1 Год назад

Ah yes, cosmic horrors beyond our comprehension. Thanks man

@Mardikuz Год назад

lovecraft?

@johnpetrakis379 Год назад

You absolutely missed his point at the end as probably most of the thumbs up to your reply. If it hadn't been fro a cosmic dice roll a long long time ago WE wouldn't be here!!!!!!!

@rao803 Год назад

@@johnpetrakis379 I didn't

@michaeldelisieux Год назад

What happens? NOTHING! Just change the bulb.

@Space_Debris Год назад

I sometimes run the video at a less compressed speed for just those slower neuron fires a chance to catch up.

@lessmore444 Год назад

The fact that we as stardust have evolved to figure this stuff out is completely mind boggling

@ChinnuWoW Год назад

It’s no wonder that it had to have happened somewhere within an infinite universe with countless outcomes.

@lessmore444 Год назад

@@ChinnuWoW makes it no less amazing

@clownavenger0 Год назад

prob happened a few times in other galaxies and possibly our own we just don't know of yet..

@lessmore444 Год назад

@@clownavenger0 yet…far more likely than not. Even multiple times, given the infinitude, still makes it outrageously rare & wondrous.

@clownavenger0 Год назад

@@lessmore444 yeah it's fairly rare if you mean how many square light-years and the amount of time it takes for a single occurrence.

@undeadarmy19 8 месяцев назад

It took me a moment to fully understand just how much of a difference the density changed when going from an iron core with a diameter of 3000km down to a neutron star with a diameter of 30km. At first I thought "hmm, 100x smaller is quite a bit smaller, but doesn't seem like enough for how insanely dense a neutron star is". Then I remembered that volume is affected by a square compared to the diameter. So, even though the core "only" goes from 3000km to 30km, the volume is about 1,000,000x smaller. Thats some DENSE matter. Especially when you consider the fact that iron is already relatively dense, that's absolutely insane.

@nuntana2 Месяц назад

Most are typically around 10km diameter when fully neutron stars, but imagine how dense and rugged the core of the star was that it can withstand the rest of the star rebounding off itself at 25-30% the speed of light!! Well it doesn't actually, because it all flattens down further becoming a neutron star.

@davefoord1259 Месяц назад

volume of a sphere is a cube relationship to the radius

@IvanWins1 Год назад

It's crazy that not so much time ago, I used to buy dvds or even blue rays with documentaries about this topics. The fact that nowadays it's free on RU-vid it's amazing, and with the same quality (even more maybe) I'm very thankful with this kind of creators, the are the real MVP

@JensRiggelsen Год назад

Small addendum regarding the name Supernova that you mention (1:20): Kepler's teacher and mentor, Tycho Brahe, was the first to publish a book concerning a new star (stella nova), namely SN1572 or "Tycho's Supernova", which appeared 32 years earlier (TWO visible supernovae in a lifetime and NONE since!) Brahe's book was "De nova et nullius aevi memoria prius visa stella", ("Concerning the Star, new and never before seen in the life or memory of anyone").

@NatarajSubramanian Год назад

Underrated comment.

@himanshuop8 Год назад

You speak like veritasium indeed.

@mytube001 Год назад

SN1987A was visible to the naked eye.

@JensRiggelsen Год назад

@@mytube001 It was indeed visible, but it wasn't in our galaxy, but in one of our closest neighbors, the Large Magellanic Cloud.

@mytube001 Год назад

@@JensRiggelsen Yes, but you only wrote "two visible supernovae in a lifetime and none since", which isn't correct. No mention of them having to be in our galaxy.

@samsisohussein4764 Год назад

This is far better than a complete sponsored documentary. This is very inspirational and underrated content!

@ThomasSeeds Год назад

Definitely not underrated. But youre right great content.

@Ignirium Год назад

yeah, this is basically why i gave up watching TV about 10-15 years ago.

@mihailmilev9909 Год назад

@@Ignirium bruh lol

@belledetector Год назад

13.1m subs doesn´t qualify as underrated ;-)

@samsisohussein4764 Год назад

@@belledetector haha also true. but still, I believe RU-vid creators are still underrated and they deserve more.

@Threedog1963 Год назад

I have seen other you-tube videos trying to explain supernovas. Mostly they say something like, once the elements fuse into iron, all fusion stops and the star starts collapsing in on itself at .2 the speed of light. This video explained it a bit more in-depth and really increased my understanding as to why iron is what starts the collapse. Thank you.

@ruyasatpathy1237 2 месяца назад

sir, i have always been so confused by stars. yours was the best explanation till date, thank you

@YouTube Год назад

the detail and research that goes into these videos is truly next level!! keep up the amazing work 💫

@pronemanoldbutyoung5548 Год назад

Hello RU-vid

@AiryFake Год назад

No way, is this official RU-vid? Damn!

@minecraftgaming4053 Год назад

Hi YT

@angusnickerson6570 Год назад

bring back the dislike button (ps, i disliked this comment)

@adityas9377 Год назад

Dang here after only 23 minutes

@BernhardHimmer Год назад

Clarification: There are stars that go supernova AND form black holes as well. The formation of a black hole doesn't mean that there is no supernova, which is clarified quite late in the video and might lead to quite some misunderstanding in the first place. Still this is another perfect video!

@jackharper24 Год назад

thank you for clarifying what the video clarifies itself

@Q_QQ_Q Год назад

yes

@rahulbanerjee8867 Год назад

So when do blackholes form and when do supernovae?

@jonoestreicher3393 Год назад

@@rahulbanerjee8867 when the mass of expansion is high enough to force the mass density apart, its explosive expansion stops and all that mass recondenses. If their isnt enough mass to form a black hole, it forms a neutron star instead.

@johnb6723 Год назад

A stellar type black hole will always be preceded by a supernova, and the more massive the star, the bigger it will be.

@robertgoss4842 10 месяцев назад

Veritasium does it again. Thank you for this clear-headed explanation of complex celestial events.

@harambe9461 Год назад

Brilliantly written, brilliantly produced. You are the perfect educator.

@LeoStaley Год назад

I watch an obscene amount of science youtube, and love supernova videos. I learned a ton from this video. You have done something wonderful here Derek.

@JamesLee-tp4db Год назад

Lni iu I’m

@Call_Upon_YAH Год назад

@hussassain2745 Год назад

Agreed, what are some of your favorite science channels?

@pufferfish1074 Год назад

It is so cool tbh i know that humans were not really meant to find out these things or even comprehend them. We were meant to be oogaboogaa at best.

@carlo3486 Год назад

I would love to see their storyboard when they were planning to produce this video! The storytelling is superb and the simplification (without compromising) of a complicated topic is impeccable.

@vigilantcosmicpenguin8721 Год назад

Yeah, this took a lot of creativity. It's one thing to make a video about supernovae, but this goes beyond just explaining a scientific concept, and it tells a story I haven't seen before.

@DARTHNEWS Год назад

The title should've been different. It's clickbait for a bunch of overstuffed information.

@ighfee 25 дней назад

Great work as always. My nieces and nephews are always asking me space questions and ill answer but also show them these cool animations which really gets the point across.

@DanielCooper1 Год назад

I never understood supernovae before - I'm sure I still don't - but now I have a better grasp, and I appreciate that you did this. Thanks!

@yoda0017 Год назад

The fact that a supernova thousands of light years away can cause a measurable change in our atmosphere is absolutely mindblowing to me. The fact that a gamma burst 2.5 BILLION light years away caused a noticeable effect is similarly mind-melting. Astronomy stuff really can be incredible. Thanks for putting together a great video on this!

@lewisperez6469 Год назад

It's a U- Bomb ...

@electricpaisy6045 Год назад

But the GbR got me thinking. Wouldn't it only effect us if one of the two beams is targeted directly at us? Seems like that lowers the chance of a hit even with an explosion within range dramatically to me. I didn't full get from the video if we have to be in the beam or not, but if so, it seems much less impressive to me than the supernova to me. You focus all the energy into two directions, of course it has a much higher range. Its like comparing a rifle to a grenade to me, but I could have understood it wrong.

@mrb2349 Год назад

@@electricpaisy6045 you are right, a GRB is a very narrow stream of particles, like a rifle, as you very cleverly put it. A stray bullet coming at us in this vast space is very unlikely, but GRBs are much more frequent than supernovae and are deadlier from further away.

@joseph_pokemon Год назад

yeah exactly I thought we could safely watch the big cosmic fireworks from like a few lightyears away xd but this really changed my perspective on how big these "fireworks" actually are!

@kwimms Год назад

Wow... amazing. Let's think about some other nonsense, make-up crap... How about Santa Clause? Heard about him? He will blow your mind! He travels at the speed of light!

@yashyash5549 Год назад

4:49 Chandrashekhar's limit 🇮🇳🔥

@belugamerde3701 Год назад

It was only named after s chandrashekhar, the limit was discovered by Wilhelm Anderson

@dellangloise9549 Год назад

@@belugamerde3701 Indians are like that, they claim everything. Even chandrashekhar himself is an American.

@mr.unknown1070 9 месяцев назад

@@belugamerde3701still you can't deny the fact that the concept was named in the honour of Chandrashekhar sir 🙂

@austerity476 3 месяца назад

@@mr.unknown1070 lots of people think Chandrashekhar discovered it. Lot of Indians think that.

@garystrankman3841 Месяц назад

First time I've seen this channel, love the way you explain all these concepts. You make it easy for the laymen to understand, WELL DONE SIR!!

@shelbyindianajones3226 10 месяцев назад

thanks I studied this years ago reading books and your refresher here in less than 20 minutes is great

@petterkallstrom735 Год назад

"The blood of life shines red from the death of former stars" (A poem by Bertil Gelland, freely translated to English. It assumes that those novas are the only source of iron, and that iron is what makes hemoglobin red)

@maxikrbr Год назад

Hello, hope you are well. I'm very interested in this poem, but i can't seem to find it complete, could you be kind enough to share it? or share a place where i could read more about Bertil Gelland? There are many results by searching the name and i'm unsure to which one you refer.

@deusexaethera Год назад

It is a correct assumption. There is no other plausible mechanism for generating large quantities of iron-53.

@petterkallstrom735 Год назад

Another of the two-liners: "A human life is short, but it has been prepared in 14 billion years"

@GlitchedBlox Год назад

Iron Lung

@adithyavraajkumar5923 Год назад

Arthropods (which don't have red blood): are we a joke to you?

@HomemadeEcosystems Год назад

Today the 8 billionth person was born. Can you make a video on what if we reach 20 (or 30,40,50,...) billion people on earth?

@TraapperA 10 месяцев назад

Kepler didn’t discover the supernova, his mentor actually did. Then he died and Kepler took credit for it.

@sreville 3 месяца назад

That whole explanation of the process of a star exploding was super interesting (along with the rest of the video, of course 😁) thank you for this!

@Stephen-ie7uq Год назад

I always appreciate the value of your productions. The bit where you showed how a star fuses the different elements as time goes on and for how long blew my mind.

@prtygrl5077 Год назад

No need of a video of that, without watching the video, I can confirm, "we all are f!kukced" if an star e!xplodes 😂💩+++.+

@ballaurina8367 Год назад

same

@kwimms Год назад

A small piece of dust would probably blow your mind... How about AC Clark... he's a great scientist too!

@kmcgregoyt Год назад

It blew my mind, too, although I had first seen this information a few years ago at an open-house presentation of the Astronomy Department at the University of Manitoba. I don't remember all of the time periods though. Does anyone have a reference for each element, all the way to iron? I was disappointed this video didn't give all of the times. I think in the end it was minutes, or seconds!

@Threedog1963 Год назад

@@kwimms Why the insult?

@ItsNifer Год назад

Love how Veritasium took this topic and really went in depth with different scenarios. Unlike other clickbait "Scientific" youtube channels out there

@nag0074 5 месяцев назад

Which channel are you talking about

@ValkyrieofNOLA 10 месяцев назад

I thoroughly enjoy the content of this channel! The subject matter is very complex, but it is explained in a consumable way to anyone with a good sense of basic scientific principles. I am a bit of a space nerd, and I can’t always find any truly interesting videos on astronomy and astrophysics that are informative and entertaining without being ass numbingly dull…

@micksmicester4488 5 месяцев назад

This Infovid is top notch ....🔥🔥🔥! Keep up the good work admin.

@gaminawulfsdottir3253 Год назад

Veritasium is consistently better-written, better-edited, and better-explained than any other RU-vid channel I've found yet. I wish more science-oriented channels had standards as high as Veritasium.

@Blahblahblehblhah Год назад

You’re a loser

@aldionsylkaj9654 Год назад

They can't so they accept mediocrity.

@soundscape26 Год назад

Yeah, but Derek has more than 10 million subscribers and a team working with him... not all channels can afford that.

@starnutron6147 Год назад

because Derek is interested in cinematography too thats why his videos are different from others

@daf666 Год назад

Kurzgesagt is also an amazing channel.

@HDestroyer787 Год назад

I can't believe I can know all this information for free. Amazing job!

@jalenwiggins5831 29 дней назад

I have done countless studies on supernovae and the way you explained the brightness really blew my mind

@zakarikante9674 Год назад

0:27 still one billion less bright than setting discord on light mode at 1am though

@windowsxpmemesandstufflol Год назад

Plot Twist: Sun went discord light mode

@cubeometry2699 Год назад

😂

@OINMAS Год назад

The Crab Nebula story was amazing. It's so easy to look up think of the night sky as static, but the entire universe is all moving faster than I can even comprehend.

@anindyadawn845 Год назад

Exactly. And this shows how bad we are at imagining the scale of the universe. The universe is so large that even objects moving close to the speed of light feels like they are at rest! Just mind boggling!

@Jezee213 Год назад

Yep, it's always moving but it seems static at times because of the massive time scales. It's amazing to think that when we see the Crab Nebula, we see it as it was 1,000's of years ago due to the SOL !

@ra8937 9 месяцев назад

This man is brilliant! Love your videos.

@prototropo 2 месяца назад

I love the in increasing eloquence of narration on this channel--and the extravagantly gorgeous graphics, such as at 08:50, or 13:40, which are brain-beguiling!

@davidsmithsmith5679 Год назад

It feels chilling to think about that actually being the end times for which ever species lived within the system.

@words007 Год назад

Somebody please tell Veritasium to make in depth video about TON-618

@dennissylvester110 Год назад

And in any nearby system as well.

@foc2241 Год назад

Hmm I don't worry at all, because (if we survive this long) then it is no longer my problem in a few decades xD

@AsinineComment Год назад

"...lived within the system." _What species_ , living in _which_ system??

@alexolas1246 Год назад

@@AsinineComment I assume whatever sapient species lived in orbit of the star that went supernova On a related note: Has anyone here played or heard of the game Outer Wilds?

@MrNicePotato Год назад

Given the vastness of spacetime in our universe, it is so amazing to have such a violent type of event that occurs in a short enough time scale comparable to a human lifetime, yet frequent enough that we actually observe a number of them within our short history.

@animalbird9436 9 месяцев назад

Extremely good and knowledgeable content as always. Well done u ❤❤❤

@WSpace7 2 месяца назад

0:57 this it the best music I’ve ever heard in a background of an educational RU-vid video, and I really don’t know why.

@Totto87 Год назад

Love your videos man. I'm a regular joe with no notable math or science skills whatsoever but for some reason your explanations makes sense to me. You should get a Nobel prize for educating the masses in all sorts of subjects. Thank you for the various topics over the years and I hope it will be so many more lessons to listen to in the future. Space is damn scary and amazing at the same time!

@MrNicePotato Год назад

Agreed. A Veritasium video with hundreds of thousands of views may have taught/inspired more minds than any regular teacher in a lifetime.

@gireeshgprasad7589 Год назад

I love this channel, but a Nobel Prize is a bit much..

@tonywu6674 Год назад

@@MrNicePotato my love for stem literally stemmed from this channel

@lukemelaia2461 Год назад

Very well said.

@madhououinkyoma Год назад

@Ironside Amen! Completely relevant /s

@HottieTobby Год назад

I've never seen a video this in depth yet clear about how all this works and how our history is with these things. This is the most interesting and fun video I've seen from you yet

@animeshjain8932 Год назад

How does neon fuse into oxygen (at 3:54) Neon(Atomic no 10) is heavier than oxygen (Atomic no 8)

@Goldfish1060 Год назад

Watch a video called "When Stars outshine Galaxies" by a channel called "But Why?". This video is good, but the gold standard of any supernova video is still But Why?'s video. Goes into even more detail but somehow is still not overwhelming.

@Rane7685 9 месяцев назад

Absolutely a credit to humanity that we were able to work all this out. Like seriously understanding (from Earth) the internal workings of stars is pretty amazing (assuming we are right)

@timw483 Год назад

Very interesting video, well done! One question: when you picked up the neutrino bursts and then called scientists to watch for a supernovae, did you ever wonder if it might be the prelude to a Gamma Ray Burst? Since both move at the speed of light, the neutrino flash might be our only warning (not that we can do much about it). Just wondering if that ever crossed your mind.

@NareshMallya Год назад

I've seen countless videos and understood partially, but this is the first time I actually understand how and why of a supernova. The amount of simplicity it went to explain this, my salute to Derek for making space and science fun and simpler.

@45coopaloop Год назад

Great video! I did a degree in physics and astronomy and can say this was a great, easy to understand review of some of our favourite cosmological objects and I really enjoyed you linking some of the supernova events in the past with extinction events on earth :) I didn't know about some of those connections, thanks as always for sharing!

@fatguyalwayseats Год назад

What do you think about micro nova or a shell release?

@vaibhavk2400 Год назад

That’s great! Published any papers?

@rae0521 Год назад

"... easy to understand review..." - Well, Jordan, your brain and mine must be made of material so astronomically different as to defy description.

@moiraatkinson 2 месяца назад

Really interesting - great video. I love the way you illustrate the massive light from a star explosion being seen by human eyes and make the pupils expand though. This is the direct opposite of what happens - pupils constrict in light and dilate in the dark to capture as much light as possible.

@mgbechetapaschal609 26 дней назад

You are an amazing man I can’t get enough of your videos Please keep it up

@frankieinjapan Год назад

It's crazy to think something so astronomically far away can literally burn our skin on earth during hot days.

@NikhilSinghRajpoot Год назад

Ok Frankie.

@stevenroper3577 Год назад

Thanks for bringing this subject down to earth - very well explained

@rapidreaders7741 Год назад

You sir, win best pun of the week!

@mikeoxmall69420 Год назад

I don't want any of those cosmic pipe bombs anywhere NEAR Earth

@manthanbapat Год назад

@@mikeoxmall69420 good sir, u need to define near, because as mentioned even a star going hypernova 150 MILLION light years away, caused mass extinction on earth

@ssalmon Год назад

@@rapidreaders7741 white

@runw1thscissorsYT Год назад

Down to earth huh

@spiralviper8158 Год назад

A video that explains the question in the title within the first 40 seconds of the video. RU-vid needs more of this.

@F-35BLightningII 11 месяцев назад

Bro taught me more than my entire school in 19 Minutes.

@annakinderman8135 Год назад

I have always admired your ability to elegantly describe the beauty of the universe. Amazing. You are one of the reasons I'm pursuing a degree in physics.

@tacobanana_forever Год назад

Good luck! It's difficult but rewarding. I did bachelors and masters in physics, and loved it. It's also buys you a TON of options professionally, and can get you some very high paying jobs.

@robertjusic9097 Год назад

@@tacobanana_forever what kind of jobs?

@tacobanana_forever Год назад

A pretty broad range @Robert Jušić . As a physicist, in college you'll likely work with: 1 - Coding, like python, Labview, Python or Statistica 2 - TONS of math, you pretty much get a bachelors with a very similar skill set to a mathematician 3 - Equipment training, if you work in research 4 - Technical communication skills: From presentations and paper writing so after graduation, if you learn to communicate your skill set, you can be an analysist (in lots of industries), data eng, software eng, professor, researcher, or most types of engineering roles. My background is in applied physics, but I've worked my entire career as a process eng in manufacturing. The big part is learning how to communicate that the skills you have are useful. Communicating how learning advanced mathematics can help in a real world situation

@robertjusic9097 Год назад

@@tacobanana_forever curently on my 2nd year of mechanichael enginering and constantly anxious that im not gonna find a job that im truly happy or usefull at. How did you menage to comunicate that your skills are usefull?

@tacobanana_forever Год назад

@@robertjusic9097 I mean, if you go into a job interview, can you articulate how you can use your math and analytical skills to help a business operate? Can you situate how you can help with your knowledge. Also, congrats, everyone gets nervous, but if you are going to mechanical engineering, you should have options!

@sebastianjost Год назад

I never heard about the connection between supernovae and neutrinos, but always found both fascinating.

@PtylerBeats Год назад

I had never heard of neutrinos

@TheBlissfulVoid Год назад

@@PtylerBeats That's okay, first time for everyone with confusing space stuff 😵

@acidoironico 10 месяцев назад

I thank you very much for sharing this content. I'm Brazilian and I'm learning a lot with you. My English was terrible, but now, I can understand all you said.❤❤❤

@TehWit Год назад

Another proof that what we take for granted and generally think has always been the norm on Earth is mostly due to insanely vast amounts of luck, has changed and will definitely change again greatly! Great video, thanks!

@student8030 Год назад

I feel like it's not luck. It's like if enough time is given, all the things that can happen will happen. A lot of such events must've occured and the sustainability of life on this planet was one of the outcomes which ended up becoming true and here we are. The same reason why existence of alien looks totally possible.

@TehWit Год назад

@@student8030 hard to disagree but.. i don't think everything can happen nor will. On a smaller scale i could have just avoided replying to you. No big deal. On greater scale, a star fart could happen which may diverge slightly the course of a big rock on its way to hit Earth in 1000 years. Who knows though. Fascinating

@user-uo3mm5dg5o Год назад

Thanks for the update about the Gamma Burst Ray observed on 9 October on Earth. I learned most of the astrophysics a long time ago and certainly like the comprehensive video display of it, but the consequences for what the effects were on Earth and on it's life that are discovered since are fascinating. It is amazing how much information you have compressed in a single 20 minute video and still be clear about the many subjects. I also like that you show the scientific abstracts. Exceptionally well done!

@Novastar.SaberCombat Год назад

Derek, this video was simply MONUMENTAL. :) Well done!! Seriously, wow. I've watched your channel for *YEARS*, and I personally believe that this is one of your most profound and awesomely constructed videos yet. I have no idea how you do it. Kudos, and... I certainly wish I could comprehend as much as I've ENJOYED over the years! Almost a decade now, I think, TBH... 🐲✨🐲✨🐲✨

@jasonbecker4974 5 месяцев назад

Thank you for all your knowledge, and teaching. You are a gift to humankind.

@whatsupbudbud Год назад

So much to learn in this short video. Left me wondering whether we can find other ways to catch the neutrinos and thus make them do work for us since there's just this massive flux of them through each of us and everything around.

@tetrabot7713 Год назад

I love it when Veritasium uploads a video about space. I can watch these videos an entire day without getting bored. Great work Veritasium!

@tetrabot7713 Год назад

@fck peace Lines in space photos is because of the telescope's mirror. The light reflects within the structure of mirror or telescope causing these lines to appear. Well the image on right is edited. So these lines are added artificially.

@cynthiamontgomery1192 Год назад

@fck peace It's the struts in the telescope.

@noaadude Год назад

This is one of the best physics videos I've seen on RU-vid. It is amazing how thoroughly you showed that theorized physics concepts have real physical effects on the Earth that we can measure and see. It's wild how neutrinos seem so intangible but yet are so impactful in supernovae and can even alert us to their presence before they become visible!

@redveinborneo4673 Месяц назад

The animation is a really nice touch

@TCFYTB Год назад

First channel I ever see to take neutrino into account when talking about supernova, very impressive

@roberthousedorfii1743 Год назад

this is one of the best vids you have ever made. Very technical, yet easy to understand by even most of my classmates who never even HEARD of a super-nova. I'll be pushing this one on friends and family.

@ViralVariety2023 Год назад

Man! This one solved all my curiosities about supernovae.Straight to the point and I can clearly understand what you want to explain in this content.Thanks mate!

@SupraSav Год назад

I didn't even realize 20 minutes went by. Thanks for another solid video

@EliasBac 7 месяцев назад

This video is absolutely amazing. ❤

@love-to-learn Год назад

You do such a fantastic job of going in-depth, explaining well and keeping it simple and fun! Loved it, thank you!

@animeshjain8932 Год назад

How does neon fuse into oxygen (at 3:54) Neon(Atomic no 10) is heavier than oxygen (Atomic no 8)

@terrifictiger Год назад

Veritasium is one of my favourite channels on RU-vid. The explanations are lucid and give the intuitive feel to understand complex ideas. Thanks Derek!

@keennickolas8575 Год назад

Thx, that was really well explained :)

@stephencummins7589 Месяц назад

Absolutely fabulous,thank you.

@bastronom4496 Год назад

Exactly this topic was my bachelor thesis in geology. Super fascinating stuff, tons of implicatons in both directions if we were able to detect them. From dynamics of our galaxy to the history of earth and life.

@Norweeg Год назад

I really like the artwork and new-ish animation style you’ve added to the channel.

@hiranakhan8522 Год назад

@dont read my profile picture. Why?

@wj2l 10 месяцев назад

Explained well. Thank you.

@mattcantstop Месяц назад

At 0:56 when Kepler notices a star he has never seen before, that makes me marvel at how much more part of nature people were back then. I could not even tell you about the stars in the sky now, never mind when I thought a new one had arisen. In many ways (but not all!), they lived a simpler time.

@WeirdSmellyMan Год назад

This is the first time I've seen an in depth explanation of what causes a star to go supernova. I've realized I know nothing.

@person8064 Год назад

The channel But Why? has an even more detailed explanation. I recommend it.

@WanderTheNomad Год назад

@@person8064 ohh, I thought this topic seemed familiar. I just couldn't remember which youtube channel I've seen it from

@jackpleb2360 Год назад

But he is wrong. Lol.

@desbugfan8429 Год назад

9:37 Just for the fun of high numbers, 6,500 light years is 61,452,657,210,672,000 kilometers.

@sumukh3 Год назад

Facinating video as always, Derek. Could you please make a video in the future explaining the creation of heavier elements (r- process, s- process and p- process)? It blows my mind to think of the extreme conditions required to create them. Makes me appreciate them that much more. Thanks for all your hard work.

@eltwarg6388 Год назад

I would vote for this as well. I am hearing all the time we are made from stars and all the heavy elements were made there before. But when? How about elements not on the fussion "paths"? I see how H, He, Ne, C, Si, Fe... are produced. How about all the other elements? Why there are high amounts of matter made of elements "behind" Fe, if the system needs an extra energy to build them? And why are they all locked in the planets? Are they? And why different planets of the same system have different distribution of the heavy elements (I mean any other than H or He)? It would be nice to learn this topic through a similar video :)

@Wyvernnnn 10 месяцев назад

I saw this video 6 months ago and I still think about it You've never done that before It's your best one

@momv2pa Год назад

Very well explained. Enjoyed watch8 g and listening to this!

@HARRi81_UK Год назад

I've watched various videos here on RU-vid on this topic but I must say this one is probably the best, due to its clear explanation, good graphics and pleasant narration.

@seanehle8323 Год назад

Excellent video! The visuals were amazing. My favorite of yours in a bit, and I love all your videos.

@user-lx3xc6ti3p 9 месяцев назад

Thanks for bringing this subject down to earth - very well explained. Ah yes, cosmic horrors beyond our comprehension. Thanks man.

@Valkyrie612 Год назад

I always learn something new on this channel.

@muraliavarma Год назад

Excellent video. I thought I knew a good deal about supernovae but turns out I did not know anything at all. Thanks for educating all of us!

@floopyFX Год назад

These videos are great! animations, music, and Derek the narrator, all top-notch quality! thanks for this Derek and the team! I think you have the best quality educational videos on earth!