How One Supernova Measured The Universe

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In 2015 astronomers successfully predicted the appearance of a supernova within a couple weeks. How did they do it? Win your Ultimate Tech Bundle by entering Fasthosts’ Techie Test here: fasthosts.com/veritasium (Competition now closed) This video was sponsored by Fasthosts.
Special thanks to Geraint Lewis for consulting on gravitational lensing. Check out his RU-vid channel: ve42.co/gfl and books: ve42.co/GFLbooks
The supernova image in the thumbnail is from my documentary, Uranium: Twisting The Dragon's Tail. Check it out here: genepoolproductions.com/urani...
References:
DEJA VU ALL OVER AGAIN: THE REAPPEARANCE OF SUPERNOVA REFSDAL
P. L. Kelly et al. arxiv.org/abs/1512.04654
Predicted properties of multiple images of the strongly lensed supernova SN Refsdal
Masamune Oguri. Monthly Notices of the Royal Astronomical Society: Letters, Volume 449, Issue 1, 01 May 2015, Pages L86-L89, arxiv.org/abs/1411.6443
Multiple Images of a Highly Magnified Supernova Formed by an Early-Type Cluster Galaxy Lens
Patrick L. Kelly et al. arxiv.org/abs/1411.6009
"Refsdal" meets Popper: comparing predictions of the re-appearance of the multiply imaged supernova behind MACSJ1149.5+2223. T. Treu et al. arxiv.org/abs/1510.05750
Irwin I. Shapiro (1964). "Fourth Test of General Relativity". Physical Review Letters. 13 (26): 789-791. doi:10.1103/PhysRevLett.13.789
Irwin I. Shapiro; Gordon H. Pettengill; Michael E. Ash; Melvin L. Stone; et al. (1968). "Fourth Test of General Relativity: Preliminary Results". Physical Review Letters. 20 (22): 1265-1269. doi:10.1103/PhysRevLett.20.1265
Research & Writing by Stephanie Hamilton, Ralph Crewe, Petr Lebedev, Derek Muller, and Jonny Hyman
Animations & VFX by Jonny Hyman & Ivy Tello
Thanks to Jaime Portsmouth for his gravitational lensing simulator and help enabling it to render simulations.
Supernova simulations courtesy of Adam Burrows
Numerous hubble images by Hubble Legacy Archive, NASA/ESA/STScI
Numerous images by ESO / NASA

Опубликовано:

19 окт 2020

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Комментарии : 7 тыс.

@ninadn 3 года назад

Teacher in online class: why are you late? Me: gravitational time delay.

@ZaHandle 3 года назад

me an intellectual: gravity on the bed is 8g

@darkinators 3 года назад

@@ZaHandle more... about 8.4g

@ZaHandle 3 года назад

seriously tho anyone know why?

@rko12 3 года назад

This excuse would work if we live on a neutron star and teacher is living on higher floors than your home. Actually in such conditions instead of time zones' discrete set based on longitude, like on Earth, it will be time rates continuum based on height levels, because of different distance to the center of the "black city-size star with about the mass of the Sun"

@ZaHandle 3 года назад

@@rko12 props to the architect who designed a 2 floor house on a neutron star

@bassett_green 3 года назад

"Do you notice that the same galaxy appears three times in the image?" Yeah I *totally* noticed

@arun2686 3 года назад

😂

@hyree 3 года назад

Would that mean... we're seeing more galaxies than there actually are in the sky?

@JorgetePanete 3 года назад

@@hyree you have to substract the ones not visible

@postmann_pot 3 года назад

@@hyree maybe they're all the same galaxy, being projected around a super massive black hole. Seen at different points in the timeline🤔😆

@PersonManManManMan 3 года назад

Todally man

@miketacos9034 2 года назад

“Hey did you catch the supernova? If not, no worries, they’ll play re-runs in a year. Or twenty.”

@rustusandroid 2 года назад

The more we learn, the crazier the universe becomes.

@ViperDivinity 2 года назад

we dont even know how deep our oceans is, let alone the Universe where everything doesn't make sense

@Jveir 2 года назад

@@ViperDivinity Except that it does

@kxufa4507 2 года назад

@@ViperDivinity The earth's deep sea is denser than you think, it gets dark every time you go deeper in water. It’s also like being in space but in water, you can’t even see, It’s like being inside a huge fog. So it’s hard for scientists to explore and find new sea creatures. Edit: My comment was confusing. So basically Earth’s deep sea is much more like space but it has an end and it is much more dense. once you enter a zone where no light would no longer could reach; you could experience very much pressure. And the thickness of fog made it so hard to see; it could be hard for scientists to search for creatures.

@mzreina74 2 года назад

@@kxufa4507 our ocean is basically space

@BryanM61 2 года назад

It's not so much that the universe is 'crazy'; the universe is what it is - and is absolute truth. It's more that it's beyond our (humans') realm of understanding...kinda like an insect trying to understand calculus. We're making progress tho.

@3nimac 3 года назад

Its incredible how much info scientists can extract from these tiny little smears of light

@karatewill75 3 года назад

Its incredible they can discern different stuff. Before the several images of the galaxy were circled I was looking all over the screen for them. If you handed me that picture before I watched this video, I would've told you they were different galaxies.

@McToasted 3 года назад

Meanwhile, there are climate change deniers, flat earthers and vaccine haters. I wonder which groups are the knowledgable ones...

@thearchetype9829 3 года назад

Veritasium you can make video on SERPINKI'S triangle The same as one I have made CREATE SHADES USING SIERPINSKI'S TRIANGLE AND YOU SMART PHONE ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-DMYn_0uTVB8.html

@abdu2s 3 года назад

Incredible indeed. If they only put that effort into things that matter more like COVID-19

@karatewill75 3 года назад

@@abdu2s I... you are aware that not everyone is a microbiologist/biochemist right?

@alfredoalfaro5000 3 года назад

One of the few youtubers that always produces top notch content is now pouring it en masse! Guess not all is bad for 2020.

@marcperez2598 3 года назад

The 2020 Redemption Arc is starting now. We got Bolivia kicking out fascists, Veritasium pumping out content, and humanity starting to wise up a bit. Let's hope this trend continues

@patrickjlyon 3 года назад

Shhh 2020 might hear you

@bobdong4462 3 года назад

in "mass" badum tssss

@strangerwithscience3597 3 года назад

Ummmm... One video a week is not en mass

@craigchapman2676 3 года назад

Compared to previous frequency, this is en masse

@rars0n 2 года назад

This blows my mind. I've always understood the concept of how objects in the sky are so far away that it takes a long time for the light to reach Earth, as if we're looking into the past. But I never considered the fact that objects between us and what we're observing could distort our observation. Science never ceases to amaze me.

@ForcesNL 2 года назад

The crazy thing is that it reaches us at all, as if those objects are transparent. It's literally seeing around objects, crazy. Space is so strange. In "micro" scale it appears to be affected by mass. How can something stretch so violently while mass holds it's ground.

@dangeros31 2 года назад

That last sentence kinda feels wrong here. Instead of "Science never ceases to amaze me.", I feel it more appropriate to say "Reality never ceases to amaze me".

@shozinryu4 2 года назад

@@dangeros31 Science doesn't equal reality. What you are referring to as "science" actually refers to the scientific method which then provide results. But these results can change if the components in it are not constant. A.k.a variables. Variable expressions can change results thus by your definition change reality.

@dangeros31 2 года назад

@@shozinryu4 I'm not saying Science is reality. I'm saying that reality is what already exists regardless of our perception; it is constant. Science is used to figure out reality, but even then Science can and is wrong, because, like you said it is always changing. Take for example the big bang. People take it as fact, but it is still just a theory that can not be completely proven. The smallest amount of evidence of scientists and people's ideal perspective of the world and universe can lead people in the wrong direction, thus making up their own false and ideal science that helps them cope with their lack of evidence. Science is just a tool to measure and observe, while reality is fact and constant; weather it can be correctly observed is another thing.

@thelocalnecromancer1224 2 года назад

@@dangeros31 whether* not weather.

@booksandvideos 2 года назад

The fact that there are multiple images of the same galaxies, delaying the light that arrives to us at different intervals is blowing my mind. I never knew something like this exists. It's cool to keep learning new things about space that continue to astound me. I'll never get tired of it.

@lukaswenzl6749 3 года назад

It is awesome to see you talk about such current research in Astrophysics. As a Phd student who grinds these papers every day it is a joy to see you manage to share these concepts so understandable and yet very accurately. It is a joy to watch!

@darshild.makwana3283 3 года назад

hiii, i also want to become an astrophysicist and for that i have to do phd so share some information plz...

@peejay1981 3 года назад

I'm glad there is someone who can explain it to us in a way we understand! I'll just stick to my electronics.

@gilgamesh981 3 года назад

"phd student" XD why would you do this to yourself

@lukaswenzl6749 3 года назад

@@darshild.makwana3283 I am happy to share some insights! Just shoot me an email

@raimonestanol8234 3 года назад

Yet I fail to understand which law made the "shorter" path "longer" for light to travel. Also how do X-rays show us the early universe? Also a gravitational lens?

@TheBandzuga 3 года назад

So this indicates that multiple generations of aliens would see me getting rejected by my crush. Interesting.

@theshadowmonster1 3 года назад

Eh Branimire branimire

@ShadowPhenix273 3 года назад

I can just imagine the aliens watching us getting rejected and thinking "ha, noobs"

@cheegum6296 3 года назад

Not only that but Aliens millions of years from now

@coolmarkyt 3 года назад

not if we nuke 'em first

@cheegum6296 3 года назад

@@coolmarkyt lol we've already been talking about nuking mars 😄😄😄

@thiccyoshi4334 3 года назад

damn I didn't know this "Einstein" dude was so famous, his bagel shop must be booming

@filipbitala2624 2 года назад

I cant believe it, every time there is anything sciency in film they say quantum or hardron or something, why dont they just use this einstein guy

@nihalbhandary162 2 года назад

@@filipbitala2624 quantum and Einstein? lol those 2 things are polar opposite of each other.

@aurigo_tech 3 года назад

@R3bel02 3 года назад

You can, with a camera. You can see the same event from different perspectives. It's pretty much the same. The light from the event from different angles.

@subhadeepchakrabarti 3 года назад

Wow, deja vu, you've found a great connection!

@asitkhanda 3 года назад

Or maybe something similar happens with multiple universes or maybe with alternate universes and we think we experienced Deja Vu. The possibilities are infinite and we are yet to discover so much more. Wow.

@pavel9652 3 года назад

@@vasile.effect It is probably not a supernova. You could find this object yourself in publically available online databases of astronomical objects and check its type. Find the first galaxy in question or lensed supernova first and then compare images. It might be tricky because these tools can be complex and built for professional astronomers, but you can do it with a little bit of trial and error ;)

@pearcomputers 3 года назад

That is legitimately mind blowing. To see the exact same event not just on multiple places, but also at different times. And not only twice but six times? Imagine that in an ordinary world setting. Literally deja vu. vu vu vu vu vu... what if that was reality and we're all just so relatively close that no 1 here notices - Oh, I found your cat by the way xx

@PK-qs4dx 3 года назад

Veritasium: Trying hard to explain gravitational lens Me: 6:28 Smiley face

@timedilatesme 3 года назад

Same here 😂😂

@chriseffpunkt4333 3 года назад

yup

@denyraw 3 года назад

Probably the biggest smiley ever

@RichardCox0 3 года назад

Saw it right away, how sweet

@ricardoabh3242 3 года назад

Why Dereck did not do a quick pun there? lol

@iver1343 2 года назад

I never heard someone pronounce Betelgeuse as beetle juice tbh

@chalybee8689 2 года назад

Same

@Amberscion 2 года назад

And I've never heard someone pronounce Betelgeuse any other way than as 'beetle juice.'

@l444.2 2 года назад

@@Amberscion like rlly who tf named that

@Amberscion 2 года назад

@@l444.2 The natives of Betelgeuse, of course. And you should hear them laugh about our planet's name: "Y'all call it Dirt? Really? Bwahahahaha!!!!"

@randomblackhole9933 2 года назад

Battle geese?

@musicman0423 2 года назад

So basically, every moment of every day is echoed through the eternity of space time, for all eternity? That’s pretty friggin amazing. The observable light that reflects from us out into the cosmos never goes away. Yeah I don’t feel insignificant or anything lol

@86GT11 2 года назад

Extraterrestrials in other galaxies be like, "Meh, I've seen this RU-vid video back in 1995.

@jamiehosmer1481 2 года назад

How can you feel insignificant?! You point it out so well yourself -- eternal echoe. My dude, you're existence is permanent and forever. That thought makes me feel way more significant despite the size of this big place.

@paragn667 2 года назад

No one is insignificant compared to the universe, think of it like this, we are part of the universe, the universe is part of us and we are part of the universe.

@herrdaniel7607 2 года назад

You are insignificant if nothing will ever know of or acknowledge your existence. If your existence echoes throughout the universe, how could you possibly be insignificant?

@Dmcjixjdndncnc 2 года назад

@@jamiehosmer1481 well.. yes and no… although we are echoed throughout all of spacetime, isn’t there an end to the universe? Or at least the 4 proposed ends that astrophysicists have come up with? so is it a finite echo then, rather than an infinite one?

@austin5060 3 года назад

Even got the updated Betelgeuse distance from just this week Nice touch

@rubi-blythin8885 3 года назад

@@AxxLAfriku what

@KacperCiesla 3 года назад

Two types of youtube comments.

@sillybilly4710 3 года назад

@@rubi-blythin8885 just always mark this guy as spam

@Piwde 3 года назад

I can't believe there's actually a star pronounced beetlejuice

@larryscott3982 3 года назад

Pog Made more difficult by its spelling Betelgeuse

@ChathuraJayasundaraIMD 3 года назад

Quality or Quantity, choose one and choose wisely Derek from Veritasium: I choose them both ❤️❤️❤️❤️

@thearchetype9829 3 года назад

@seemysight 3 года назад

that what a decent team working like an well oiled machine can do

@veritasium 3 года назад

it's not sustainable. I'm gonna need a break after this.

@Pingviinimursu 3 года назад

@@veritasium It's very good that you know your limits. I think you can also be a good example for a lot of people who might not be as conscious of their capabilities. Take all the time you need, we'll be waiting for you when you come back!

@SnapThority 3 года назад

@@veritasium Don't worry, just go take however long you want, and come back to produce more videos with greater zeal!

@ddawson100 2 года назад

That closing remark beginning @11:36 is amazing. I had to go back a few times to listen to that. “What is contained in those distortions is information about the workings of our entire universe.” It’s really amazing how we can see so far away and glean bits of information.

@BerkeiSzilard 2 года назад

It is so refreshing that somebody not just asks more questions, but answers the ones I was never even asked, but always wanted to know!

@broccolirob5026 3 года назад

I’m so glad there are people smart enough to know what’s going on when they look through a telescope lol

@emmadabdelkrim3073 2 года назад

Why ?

@broccolirob5026 2 года назад

So they can tell dumb people like me about the blobs of light I’m looking at

@joeblack1126 2 года назад

But do they I wonder.

@broccolirob5026 2 года назад

@@joeblack1126 there’s probably a bit more speculation than they’d like to admit 😜

@noahway13 2 года назад

@Waldel Martell I don't agree. If they had smarts and discipline, they would already be something worthwhile .

@AverageAlien 3 года назад

This is the kind of content that needs to be on the trending tab

@nickllama5296 3 года назад

The large, large, large majority of mankind will look at this video and have absolutely no clue what on earth he's talking about.

@jimlahey5354 3 года назад

Too many stupid people though.

@Miranox2 3 года назад

Thinking hard. Brain hurt.

@RahulKumarAitian 3 года назад

@@nickllama5296 when we have 100 thousand of human still debating whether earth is round or flat, such content is not going to trend in next few years.

@josepalacid 3 года назад

Are you asking RU-vid algorithm to work against the interest* of their investors? *wherever "interest" is written it has to be read as "money".

@sylwiadrozd9899 2 года назад

Your videos are so fascinating, Derek, that I forget about my duties. Great, high quality content and your professionalism in each episode. Waiting for more cosmic news from you. Lots of love...:)

@Wishkeyn 2 года назад

The appearance of technology and knowledge related to photography when it comes to cutting edge science is something that amazes me.

@martixbg 3 года назад

What I learned from this video: Cosmologists are smart AF.

@mysteryman3239 3 года назад

Yes

@mohammadumair3108 3 года назад

Me too.

@popazo8556 3 года назад

Astrology is amazing

@starnutron6147 3 года назад

@@popazo8556 this is astronomy not astrology

@maxwellsequation4887 3 года назад

@@popazo8556 tf

@PapaFlammy69 3 года назад

Spacetime be like: But, will it bend?

@FoxamPL 3 года назад

but can it do this?

@samovarmaker9673 3 года назад

b-but the fundamental theorem of astronomy is π = 1, h-how can astronomers measure things so p-precisely?

@devilixh253 3 года назад

Bends so hard the strings might break

@devilixh253 3 года назад

@@samovarmaker9673 fr? π=1? Here i thought π=3 was bad enough

@pietro93vit 3 года назад

Surely djent

@stoichioman9944 2 года назад

"How fast are we expanding?" Judging by the amount of tacos I'm eating... We be expanding fast

@kumarvishal6558 2 года назад

good analogy my friend....laughing emoji

@felixliu5149 2 года назад

expansion

@abicol6010 2 года назад

I wrote about this for a school project two years ago! But even though I already knew about this discovery, your visuals and explanation were still super infomative! I can't believe I just found this video.

@ASLUHLUHCE 3 года назад

Gravitational lensing makes things show up at different places AND at different times. Now that's cool !

@slash196 3 года назад

"Different places" and "different times" are two ways of saying the same thing. Now THAT'S cool.

@rdmz135 3 года назад

@@davidsantiagoalonso its a bot

@ssxxxss 3 года назад

@@davidsantiagoalonso it's a bot:")

@mukrifachri 3 года назад

Yeah, this is some new revelation. We've gone through the simpler location-based ones, but making sure that time goes with it is something.

@mukrifachri 3 года назад

@Amey Shinde And at different moments as well ! Otherwise the observation wouldn't work.

@addemater 2 года назад

Quality content like this deserves "RU-vid Tenure." I couldn't imagine a world without Veritassium.

@mctthw 3 года назад

Teacher: “don’t worry, angry eye smiling stars aren’t real, they can’t hurt you” Angry eye smiling stars: 3:47

@alnaskabeer1361 3 года назад

I like to imagine it as lasers coming from the eyes of a distant supermassive alien

@thearchetype9829 3 года назад

@jamirimaj6880 3 года назад

ratioed by smiling stars 6:28

@craigg4251 3 года назад

this actually made me laugh so hard

@JackSalzman 3 года назад

Wow lmfo

@lmamakos 2 года назад

What a great description of gravitational lensing! I'm just an amateur astrophotographer and have managed to image the "Twin Quasar" with my equipment, but I could never quite understand how the lensing produced (in that case) TWO images rather than some other effect. I think that I now less confused than before, so yay!

@therealKINDLE 2 года назад

Yeh right! When I look in ze mirror, I don't see two reflections do I? Oh.. wait..

@tylerdurden3722 Год назад

@@therealKINDLE a lense, and a mirror are not the same.

@randomhunter47 9 месяцев назад

I come to RU-vid to watch the British GP highlights and now it's 4:19am after a couple of vids from this channel. Fantastic stuff

@llaughridge 3 года назад

"A star might die only once, but with Einstein’s telescope, if you know where to look, you can watch it scream forever."

@freyjaandersdottir3311 3 года назад

Well, that's not at all ominous or creepy!

@Lighthouse_out_of_order 3 года назад

True poetry! This is the most underestimated comment of the month. Thanks for the chuckle.

@the_real_vdegenne 3 года назад

scream ? why screaming ? It's just a ghost dancing in grace.

@levimullins5693 2 года назад

@@the_real_vdegenne Violently exploding isn't graceful

@RaviKumar-cn7pt 3 года назад

Man: No one bends like her Universe : Hold my gravitational Lenses

@laimisss3 3 года назад

lol

@drover7476 3 года назад

Hahaha one of the best astronomy jokes I've ever heard

@ZackestTV 3 года назад

Bazingaaaa

@pakobholo 3 года назад

itna dimag kaha se late ho

@roberthawthorne8396 3 года назад

Not lensing. It's refraction from changes in plasma density.

@javiersolis2993 2 года назад

It's just mind blowing how much information scientist can extract from those images!

@ratnavallisekuru4784 2 года назад

Incredible . I was awstruck to know your version of sky as a transparent lens thereby giving multiple images of the same object ..a supernova.. hatsoff to you..Derek

@harpreetdhaliwal2127 3 года назад

Happiness is seeing Veritasium’s new upload notification.

@MrPokeboy8 3 года назад

yes

@Runeansfelt 3 года назад

Do Veritasium have merch? It's the best educational channel. ❣️

@MichaelSBaram 3 года назад

Actually, its chemical reactions in your brain...

@mystic2997 3 года назад

Simp

@Kushb4an 3 года назад

No its vsauce.

@evandotpro 3 года назад

This absolutely blew my mind. I expected nothing less from you, Derek. Thank you for everything you do.

@Kujeful 2 года назад

Thank you for the wonderful video again, Derek! I came back to it a second time, and noticed at the end you say you used to think of universe like it would be glass, and how strange it was. How do you view the universe now afterwards? I'd still think of it roughly a glass-like substance in the sense, that light travels slower through denser materials, or takes more time to traverse a thicker part of the glass. Just that in the case of the universe, that thickness is tremendous really. Curious thought I think. Here's to hoping there are other similar events coming up!

@arsalanafrakhteh7226 Год назад

I just can't get enough of your contents! Thank you so much!

@biggiecheese3377 3 года назад

this makes me think about how lucky we are in the universe, we have perfect solar eclipses, we have a bunch of planets in our solar system, and we got a perfect view on a duplicated supernova and its host galaxy to go with it. I can't believe how you get all this information, and how you teach it so well

@connormeagher2203 3 года назад

there are multiple people that work at Veritasium and that spend hundreds of hours doing research on this sort of stuff and making sure it is correct

@JEAthePrince 3 года назад

Not lucky. Blessed.

@captarmour 3 года назад

i think it was Robert Jastrow who said 'The Universe Knew we were coming'. it has been said we live in 'perfect real estate!'

@fhz3062 3 года назад

Douglas Adams, the water pounding fallacy. ;)

@sulaimaanchamda4501 3 года назад

@@fhz3062 whats that about, is ther somewhere i could read about this fallacy?

@luqcrusher 3 года назад

6:27 the galaxy is smiling at me im uncomfortable

@jettaeschroff6924 3 года назад

@thetekneiqueandotherrandom409 3 года назад

That's so true

@FatePillager 3 года назад

Looks like Walmart is about to slash prices in a galaxy far far away

@my_stuff4210 3 года назад

@francisconegrete5773 3 года назад

@3:47 is even more lol

@keithivey6175 2 года назад

Thank you so much for this fascinating episode . I am hooked

@astrospeedcuber 2 года назад

I am mind blown and completely overwhelmed by all this info, love this amazing channel!

@ricric1978 3 года назад

wow they named a lotta things after this “einstein” guy. he mustve been smart

@pewds6910 3 года назад

yeah, but he probably plagiarized a lot

@louisrobitaille5810 3 года назад

@@pewds6910 Someone clearly has no idea who Einstein really is and what he did...

@leon_brave_racing898 3 года назад

Or just creative and persistent

@pearcomputers 3 года назад

@Nirek Setty st1 - modest too and loved beer apparently ;) Barman! .. yeah ok, I'll do the same.

@honglee6880 3 года назад

Ong yean yen is smarter.

@derreckwalls7508 3 года назад

Watching Veritasium convinces me that nothing is beyond our human capacity to understand, and that I understand so little of it. It is humbling, encouraging, mystical, logical, frightening, and comforting all at the same time. It is a wonderful universe. It is a wonderful channel. Thank you.

@thegr8malachite370 3 года назад

Thank you for your comment!

@guilhermelouzada56 3 года назад

yes, there is a thing that I strongly believe humans could never understand, quantum mechanics

@ice_wallow_come5449 3 года назад

Another existential crisis for a week 😛😛😛

@mukrifachri 3 года назад

Given a very large amount of time, we'd eventually understand things - but how long would it be compared to a single human lifespan, we just don't know, and some things would likely remains not understandable when you die. Still, it's possible to fall to the cracks, and that day will have to wait a bit longer... ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-5hVmeOCJjOU.html -> interesting talk from Sean Carroll (the idea once featured on Veritasium's channel as well).

@erosa1983 Год назад

Thanks, man you explain such a complicated things in such an easy way that even an amateur can understand all

@speckitis 2 года назад

An AGN could also have “time stamps” in it’s spectra that can be used to differentiate the light paths in a multi-lensed system. There’s an AGN in the northern hemisphere (I forget its name) with two distinct images that differ in age by a little over a year. Neat stuff.

@anniekallen4472 3 года назад

Me: *shrug* Can't we just call it roughly 70km/s? Joseph Silk: It is a possible crisis for cosmology.

@Yadobler 3 года назад

Astronomers: ye ±10000 years Also Astronomers: NO ±1 IS 🚫🚫❌😤 (but ye, the consequences of having such large range of values is that anything to do with a tiny difference in rates and changes will balloon up and really grow dramatically when used with real data values, that the error margin is as good as saying a human lives on average of 1ms to 2*10^14 years.

@rancidalankar1322 3 года назад

If we are taking a rough estimate, I would suggest 69km/s which can be called NHC or Nice Hubble constant .

@thorstensteffen3640 3 года назад

@@rancidalankar1322 big brain

@sans.1hp 3 года назад

@@rancidalankar1322 noice

@jerbib9598 3 года назад

@@rancidalankar1322 - the Hubble constant is variable in time because in different regions the strength of the dark energy is varying with the density of the virtual particle activity in that region.

@ashishsharma-og4nl 3 года назад

BRO YOU'RE CRANKING VIDEOS LIKE CRAZY!! HOWW?

@veritasium 3 года назад

Two things: I've got a team now, and sponsor deadlines haha

@mastershooter64 3 года назад

@@veritasium awesome!

@michael04__806 3 года назад

@@veritasium ur amazing

@ashishsharma-og4nl 3 года назад

@@veritasium and you'll always have our support too On behalf of your subscribers

@SulemanAsghargoion 3 года назад

@@veritasium hope that you are alright though.

@tigerstyle1014 9 месяцев назад

Fascinating stuff!! And kudos to all people who work so hard to unravel the mysteries of the universe

@jimjimjimjimjim6572 2 года назад

ugh man I never want your content to stop. especially when it's about SUPERNOVA

@austiniscoolduh 3 года назад

If a supernova is as bright as the moon, maybe that’s why some old paintings had 3 suns/moons in the sky. One of them was a supernova that was there for their whole lifetime

@IWillBe13 3 года назад

I think if 3 moons would have been in the sky for a whole generation as you suggest then that happening would have been historically marked somewhere. In other words, we would have know about it

@TheZahirNT2 3 года назад

I don’t think it could maintain that level of brightness for more than a few months at most.

@mimih22a 3 года назад

10,000-20,000 years ago. The earliest possible recorded supernova, known as HB9( also known as two sun's), could have been viewed and recorded by unknown Indian observers in 4500±1000 BC. In 185 AD, Chinese astronomers recorded the appearance of a bright star in the sky, and observed that it took about eight months to fade from the sky. It was observed to sparkle like a star and did not move across the heavens like a comet.

@Localguitarman 3 года назад

Bless this man, he's putting out so much quality content for us

@thearchetype9829 3 года назад

@wplaat 2 года назад

I learned today sometime. Really great content. Keep on the good work

@hitarthbulsara9649 7 месяцев назад

And then, there are flat earthers😓

@sverma6811 3 года назад

I am a student in 9 th standard I wasn't much interested in science until I started seeing your videos , I think it's been a year and a half since I saw your first video . I was so satisfied that I started watching more of them and in no time I found my perspectives changed.Science had become my favourite subject especially physics .This happened just because of you.I would like to thank you from the depth of my heart for that .I feel now that I have an option to pursue in my life ahead as a career, in science and now I am hopeful for my future which I wasn't earlier,perhaps.Thank you so much sir! Please continue making videos on such topics .Your way of explaining topics is better than any other channel on you tube as far as I know( perhaps better than even my teachers). Really appreciate your videos !!!!!

@varunahlawat4863 3 года назад

I'm a random science guy advice: only science education could change our probability of survival! Now it is most probable that we're gonna extinct! Great you got the right way, encourage others who can't never tell your friends to take what they want, tell them to take science, I'm too from India and ya you will discover that how wrong are RELIGIONS are how wrong are the things we were taught... enjoy...

@Musiphymatic 3 года назад

@subrat verma Same as you I too developed interest in Physics because of Derek and Michael Steven(from Vsauce) and I am really grateful to these guys. Best of luck for your future. And btw I am from India too :)

@sverma6811 3 года назад

@@varunahlawat4863 You are absolutely correct And besides that we are taught things that assume only historic Importance nowadays. For e.g. I am being taught gravity the Newtonian way even today it's been more than 100 years for General relativity But it's mentions are not till high level university courses in India. So that definitely something wrong with the education system Thanks for your reply!!

@sverma6811 3 года назад

@@Musiphymatic Thank you very much bro V sauce is also a pretty good channel, I really like that channel and apparently I got to know of Veritasium from Vsauce's Lenz'law video

@sverma6811 3 года назад

Both the channels(V sauce and Veritasium) are equally good and perhaps the best online learning sources

@ChrisInmanDrums 3 года назад

I watch these videos now with renewed excitement and interest. I finally started at University of as a Physics student after years of watching videos by channels like this, which eventually led to my passion developing to the point where I had to take it more seriously. Crazy to think that, despite officially leaving education years ago, RU-vid channels like Veritasium would take me back purely out of a genuine interest that I never felt for any subject when I was actually in school. The point of this comment is to say thank you for the inspiration!! And to keep this sudden flood of videos coming! :D

@Sp1der44 2 года назад

A really good explanation of a kind of mind blowing phenomenon. Great stuff!

@skatedude4882 2 года назад

6:32 my sleep paralysis demon smiling at me in my dreams

@cycrothelargeplanet 2 года назад

Lol

@Vestalana 3 месяца назад

Agreed...

@TheNameOfJesus 3 года назад

All I see at 6:24 is a happy-faced smile.

@mikev3279 2 года назад

Smiley space 🙂

@STriderFIN77 2 года назад

:-)

@gallium-gonzollium 2 года назад

3:46 as well

@chuckclark6162 2 года назад

I see a demonic Koolaid Guy.

@chuckclark6162 2 года назад

@Shinay You're the type of person that wakes up on a Monday morning and immediately takes to insulting people on social media... Your life sucks, but not as much as your syntax.

@NikhilSingh-mk9kc 3 года назад

I still giggle like a kid when seeing your videos like I used to 10 years ago. There's something so beautiful about understanding the mysteries of the universe. It's almost poetic

@markhuebner7580 2 года назад

Wow! Thank you! Awesome clarification of the Einstein Cross/Ring gravitational/time realities!

@daniochoa2110 2 года назад

Beautiful video. Great images, great animation, very well explained

@Dillinger86 3 года назад

My 5 year old nephew loved watching this, he had an endless list of questions for me during & after lol.. He can't even sit for 2 minutes for his online kindergarten classes but he can sit still through this entire video.. Well done man.

@redkb 3 года назад

So cool.

@ssxxxss 3 года назад

Have to agree.

@ricardorix73 3 года назад

Shouldn't you be solving puzzles of something?

@xXJamaikaXx1 3 года назад

Heeyy Red I really miss your cubing videos

@cpt.taselbymc8400 3 года назад

Lmao, of course you're here

@athena706 3 года назад

OMG I remember you from when I was a child! I use to watch your unboxing videos everyday! You got me into cubing when I was around 9, but I've stopped. Now I got to find my collection of cubes lmao XD

@richiebricker 2 года назад

VeryCool stuff! Thanks again for making these videos. It seems harder to get this kind of info since Discovery channel went all Naked and afraid and ghost hunting but we still do get accurate information about how many crabs can fit in a boat and that Pirate Captains dont really leave their gold behind. There is amazing amounts of new discoveries that youve let me in on and now that crazy James Web Space Telescope is gonna fly soon, Im overjoyed

@NoobMaster-or2jf 2 года назад

This is so cool. You really have an eye for this thing!

@TusharGoyal1997 3 года назад

Derek: How many Veritasium videos you want this quarantine? Me: Yes!

@TheSecondVersion 3 года назад

There is only one veritasium video. You're just seeing multiple versions through a gravitational lens.

@alfredjames4530 3 года назад

I have to report you twice because you violated 2 of the guidelines please in the future don’t do it again

@takeizo 3 года назад

What does his channel name mean ?

@gamaltk 3 года назад

@@TheSecondVersion Hahahah nice one

@user-sl9uq8rl2t 3 года назад

@@takeizo An element of TRUTH

@aaroncameron1494 3 года назад

This is nuts. The split image of the galaxy really appears that far away from the original.

@JacobRy 3 года назад

@RITA , I LOVE SЕХ , WANT SЕХ !!! OPEN MY CANAL !!! no

@konstantinkh 3 года назад

They are actually very, very close together in the sky. The light is deflected by a tiny angle, and you would not be able to distinguish it from single source by eye even if it was bright enough to be visible. Hubble, however, has an absolutely incredible zoom, allowing it to take a region of space that would look to you like a single point in the sky and expand it out to show all the galaxies and clusters of galaxies that are there.

@superbaddctv 2 года назад

This was one of the coolest and informational videos I’ve seen in a while

@krb4179 2 года назад

This is very interesting. From the perspective of the viewer, time not being linear is an extremely cool concept... Gravitational Tarantinoing.

@danielstephenson7558 3 года назад

Gravitational lensing blows my mind. "Oh, those four galaxies you can see over there? Yeah, they're the same one..." Madness.

@Zalamedas 3 года назад

It's crazier than the looks. It appears not only in different locations, but different times. It's really mind boggling

@YCbCr 3 года назад

@@Zalamedas It's not just looking in the past, but you can choose which past are you looking at. 20 years, yet lightspeed. What had it got to go through...Fascinating.

@FlyingSavannahs 3 года назад

Awesomeness.

@karlkarlsson9126 3 года назад

The time-dilation measurement blew my mind

@FronaldChettiar 3 года назад

Me everytime I click on a Veritasium video: Easy peasy. I'm know it all Midway through the video: holy moly, wtf did I just hear

@sorjhan2214 2 года назад

Its crazy how far we have come in the last 50 years or so... in our understanding of the universe and its mind boggling how far we will be in the next 50.

@mmehdi3437 2 года назад

Whenever i feel like i need to know more about the universe, i check this channel !

@dellhpfree 3 года назад

It’s mind boggling that we have people who believes that Earth is flat and only 6000 years old.

@GD15555 3 года назад

And what do you think it is? Cube that’s million years old?

@Kislay11 3 года назад

@@Wu-Zi-Mu he is trolling dude

@loudeclercq 3 года назад

That's absurd, Earth is only 5000 years old !

@NimbleRedFox064 3 года назад

The Bible tells us it is around 6,000 years of course. Around 2,000 years from Adam and Eve until Noah and the flood, then about 2,000 years from that until Jesus Christ died on the cross for our sins, and about 2,000 years from that until now. And if you think that is just a story, then why do you think the whole world uses the time frame of B.C and A.D? The Bible lists the genealogy from Adam and Eve all the way to Jesus Christ, so you can technically add all of that time up plus the year it is now and it will be around 6,000 years. Oh and also the Bible states that the earth is round.

@DanielSMatthews 3 года назад

One of the most impressive pieces of astronomy work I have ever seen, to actually come up with a testable hypothesis and have it confirmed is science of the highest quality.

@shinji906 3 года назад

Well that's literally how science works. You make a prediction, then you make an experiment to see if the values you get from the prediction match the experiment values. If they do, your theory is probably correct. Every once in a while, your theory doesn't predict the outcome of a specific experiment, and the science cycle continues... At least that's how I understand it

@DanielSMatthews 3 года назад

@@shinji906 Yep, but how much of "science" is really _science_ then? See now why I am impressed?

@thearchetype9829 3 года назад

Hey Veritasium you can make video on SERPINKI'S triangle The same as one I have made CREATE SHADES USING SIERPINSKI'S TRIANGLE AND YOU SMART PHONE ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-DMYn_0uTVB8.html

@DanielSMatthews 3 года назад

@@thearchetype9829 I'd rather see a video about this idea and what possibilities it opens up, dsmatthews.blogspot.com/2020/04/covid-19-solution-changing-rules-of.html

@Oripave 2 года назад

I love watching these videos it is so fascinating thanks for all these free videos I appreciate it

@taralpatel2718 2 года назад

Mind blowing as always Thank you very much for giving this much free knowledge and veryyyy high quality education

@soumendutta1084 3 года назад

I watch these videos & I wonder how tiny we are & how short a period of time we exist..yet every problems that we face seems so big & significant in such a short period of time we live. These space videos makes me forget every pain that I have..😊

@wobblysauce 3 года назад

We are but an ant, many times smaller than the things above us.

@malhar073 3 года назад

This guy can convince me to take the blame of crimes i didn't even commit.

@Nipun_Chauhan 3 года назад

Fr 😂😭

@KalpeshRingasia 3 года назад

🤣🤣🤣🤣🤣

@leexingha 3 года назад

i smell BL

@teckzusferalupus5382 3 года назад

You commited it, the information is just delayed by gravitational lenses.

@Alex-jq5ft 3 года назад

This killed me, it's so true

@THE_MOONMAN 2 года назад

One of the most interesting videos I've ever seen on this platform. Super cool stuff

@danielchavis7675 2 года назад

Great info ....and how you make the universe more logical and having more than one set of finite Equations nice I like it

@markdowse3572 3 года назад

Looks like Arthur C Clarke got it right when he wrote: "It's full of stars." in 2001: A Space Odyssey That lensing effect must make a tricky job even trickier! 🤔👍

@jso19801980 3 года назад

i dont understand any of this. but i see a smiley face at 6:31

@pujeetjha8265 3 года назад

thats god looking back XD

@Letmenyoom 3 года назад

@pushbaner5219 3 года назад

Meme lord

@timg2655 3 года назад

🌝

@krism6171 2 года назад

I absolutely love space and I hope one day im able to contribute to the research of it

@kovelamanas9905 Год назад

Beautifully explained

@ansa6625 3 года назад

1:40 "In the next hundred THOUSAND years." :(

@benoit-pierredemaine3824 3 года назад

An eye blink ...

@bruhwtf2662 3 года назад

Also the music stopped lol

@kingsoonkit9234 3 года назад

That caught me off guard

@lizardlegend42 3 года назад

But that could still be sooner rather than later

@Hendlton 3 года назад

Like he said, it's hard to predict. It could happen tomorrow.

@MusiXificati0n 3 года назад

I'm always astounded by how smart some scientists are. Especially physicists. And here I am, frustrated by my excel shenanigans...I think I still have a looooong way to go :c EDIT: Thanks for the supportive comments about my excel frustration :D you are very wholesome :3

@zwz.zdenek 3 года назад

Mathematicians are arguably even smarter, but you need to work hard just to appreciate that. Physics' connection to reality gives it ways to get popularized.

@vivianmiranda397 3 года назад

I’ve struggled with Excel a lot also :) (and I sign the H0 paper cited in the video) - so dont despair!

@MrTorchia1000 3 года назад

To be fair science has had to literally change around excel's stupid bulshit.

@Kycilak 3 года назад

Yeah, Excel can get headaches even to bright people. I work in a membrane laboratory and it is pain for all of us.

@cachecollin6984 3 года назад

@@vivianmiranda397 that great seeing y'all people gather here

@notkaisan 2 года назад

'Someone : spilled a coffee' Scientist : "new universe have been discovered"

@dr.michaellittle5611 3 года назад

“ objects may be closer than they appear”

@Henchman1977 3 года назад

I feel as though I actually understood this. Please don't ask me to explain it.

@memeing_donkey 3 года назад

explain it.

@rugerbrooks 3 года назад

But if you can't explain it then you don't really understand it? According to Einstein anyways. (Don't worry though, I don't really understand either!)

@tservator8064 3 года назад

Please explain it

@aadarshraghuwanshi7022 3 года назад

if you can explain it then you really understood it

@ForestDewberry 3 года назад

The gravity slows down the light. The light went in all directions, there were 4 lenses that redirected light back to us. We knew there were 4 lenses because the galaxy appeared in 4 different places. We saw the supernova in one of those places, ie from one of those lenses, then another, so we figured it's gonna appear the other place. somehow we figured out how long the delay was (maybe looking at how out-of-phase the rotation of the galaxy was in each image) and we added that to the supernova we saw to figure when we'll see it in the last image. @veritasium how'd I do?

@jaffasoft8976 3 месяца назад

Quite the most amazing insight. But that ppl figure this stuff out is astounding. 20 yrs delay is a hell of a lot of distance for light that’s mind blowing.

@joeblack2534 2 года назад

fantastic video ! i loved the effects

@friendlymods6567 3 года назад

If even half my teachers could break things down like you do with said enthusiasm I might of wanted to learn a whole lot more when I was in school. You really do teach people alot.

@senkuyagami9949 Год назад

is it actually worth then joining some top astrophysics clg cuz I have to finalise my admission I love space...but not the education sys

@The.RandomTube 3 года назад

The fact that a 14 minute long video passed this fast is amazing🔥

@GGoAwayy 3 года назад

I know right... fourteen minutes is foreeeeeeeverrrrrrrrrr....

@austinwolfe7295 3 года назад

Thats an example of relativity lol

@The.RandomTube 3 года назад

@@GGoAwayy Nah, I have watched an hour long videos on things like these. But the 14 minutes didn't even feel like 5 minutes!

@The.RandomTube 3 года назад

@@austinwolfe7295 Lol

@vigilantcosmicpenguin8721 3 года назад

Must be caused by some kind of bend in spacetime.

@maedhros9285 2 года назад

Veritasium at 8:16: So scientists had been studiyng this clusters years before the supernova. That is especially impressive, seeing that the Nova happned billions of years ago...

@Articulate99 2 года назад

Always interesting, thank you.

@AshishKaushik4994 3 года назад

I was told, "if you missed an event you cant capture it again."

@randal_gibbons 3 года назад

That was Kodak's fear propaganda campaign used to sell more cameras.

@irfanjames 3 года назад

Unless if you are trillions of light years away from where that event occurred.

@Bittertokken 3 года назад

@@irfanjames you mean travel ahead at the speed of light so you can watch it again?

@exorias625 3 года назад

jokes on him i can see a sunset 3 times if im in dubai

@Soken50 3 года назад

Well, you can't, not even once, as all you really capture is electromagnetic echoes of the event, but provided you are at the right spacetime you can see other echoes of the event :D