Most Galaxies are Moving Faster than Light!

To understand how the universe can expand faster than light, we need to understand how causality works in Einstein's general relativity.
HUGE thanks to Dianna Cowern for helping make this video more relatable!
/ @physicsgirl
________________________________
VIDEO ANNOTATIONS/CARDS
The Cosmic Microwave Background:
• Cosmic Microwave Backg...
What is Time?!
• What the HECK is Time?...
Cosmic Horizons:
• Is the Universe a gian...
________________________________
RELATED KZbin VIDEOS
Domain of Science on FTL Galaxies:
• 97% of Galaxies Are Mo...
________________________________
SUPPORT THE SCIENCE ASYLUM
Patreon:
/ scienceasylum
Advanced Theoretical Physics (Paperback):
www.lulu.com/shop/nick-lucid/a...
Advanced Theoretical Physics (eBook):
gumroad.com/l/ubSc
Merchandise:
shop.spreadshirt.com/scienceas...
________________________________
HUGE THANK YOU TO THESE PATRONS
Asylum Counselors:
Matthew O'Connor, Nikolaos Vasiloglou II
Asylum Orderlies:
Fabio Manzini, William Morton, Medec Hurtz
Einsteinium Crazies:
Charles Copley, Ken Davis, Wacky, Eoin O'Sullivan, LT Marshall, Ilya Yashin
Plutonium Crazies:
Madhu Subbu, Ellis Hall, Compuart, Kevin MacLean, Al Davis
Platinum Crazies:
Mr. Orn Jonasar, David Johnston, Cody Martin, Boris Petrovchich, André Weyermann, Olga Cooperman, Tom Hawking, Kyle Bowles, Marino Hernandez, Jon Adams, Vittorio Monaco, Stephen Blinn, Mikayla Eckel Cifrese, Jonathan Reel
________________________________
OTHER SOURCES
www.forbes.com/sites/startswi...
math.ucr.edu/home/baez/physic...
ned.ipac.caltech.edu/help/zde...
astronomy.swin.edu.au/cosmos/...
arxiv.org/abs/astro-ph/0011070v2
arxiv.org/abs/astro-ph/0310808
what-if.xkcd.com/13/
en.wikipedia.org/wiki/Mollwei...
________________________________
LINKS TO COMMENTS
• My Wife Reacts to Quan...
• My Wife Reacts to Quan...
• My Wife Reacts to Quan...
• My Wife Reacts to Quan...
________________________________
IMAGE CREDITS
Andromeda Galaxy:
www.jpl.nasa.gov/spaceimages/...
Cosmic Microwave Background:
sci.esa.int/web/planck/-/5155...
sci.esa.int/web/planck/-/5288...
Derek Muller:
/ 1
________________________________
TIME CODES
00:00 Cold Open
00:31 Light is slow.
01:49 Universal speed limit? Not really.
02:36 Causality
04:00 Why are galaxies going so fast?
05:20 Hubble Horizon
06:43 Comoving Frame
08:05 Peculiar vs Recession Velocity
10:15 Doppler vs Cosmological Redshift
11:24 Summary
12:01 Outro
12:18 Featured Comment

[@blueckaym]

"... some galaxies should be moving away from us faster than light! But how is that possible?! ..." "This was made possible by generous supporters on Patreon."

[@sadkritx6200]

Those supporters are getting too powerful!!

[@Robert_McGarry_Poems]

It's like, if I'm riding a purple polkadot dragon at the speed of light... And a yellow submarine passes me at the speed of light... That is 🚫NOT🚫 2x the speed of light. That's like, relative to the yellow submarine my purple polkadot dragon is standing still. If two events are not causally connected they can be moving at more than the speed of light away from each other. The shape of the 3d space, that guides the dragons and submarines, is kind of hard to wrap brains around so we use 2d representations. Curves... Like two dips on a graph moving in opposite directions from one another at the speed of light. At the top of each dip is some sphere. Each is released at the same time and rolls to the bottom of their respective dip. Relative to each other, the objects moved faster than light, right? In that case, it doesn't matter. No information is being exchanged. They do not move faster than light in their local system, the dips.

[@blueckaym]

@@Robert_McGarry_Poems Ok, but if your purple polish dragon flies at the speed of light by a intergalactic bus-stop, and at the same the yellow submarine passes your purple polish dragon at the speed of light, then at what speed the yellow submarine passed the intergalactic bus-stop?

[@thesecondslit1710]

hahahahahahahahha....

[@mmercier0921]

They are misunderstanding the relationship between time and light and space. The galaxies are not moving. The space between them is expanding exponentially. Time, light and matter are actually waves reacting to the expansion of nothing. Nothing observable moves everything that is. That is all we can see now.

[@3Chandresh3]

This guy is so underrated He explains complex problems with such ease

[@acrobatmapping]

No, he made it more complicated than it needed to be. All he needed to say was that space itself can expand faster than light, but light must move within that space at the speed of light.

[@3Chandresh3]

@@acrobatmapping make a youtube channel, say it yourself. No one is stopping you mate.

[@Mikey-ym6ok]

@@acrobatmapping yeah I noticed I’m always more confused after finishing his videos and don’t feel the answer is ever really answered

[@Anthony_Matabaro_3D_360]

@The Chandricle, I couldn't agree more

[@thesecondslit1710]

@@acrobatmapping I understand your point. However, consider most viewers are not actually scientists for a living, and a great deal of stuff that 'goes without saying' for some of us (me sometimes) is not really that clear, and confirming or even explaining in depth (even being a lil' bit redundant sometimes) is actually quite useful for those who grasp the logic but not all the formality ('because Calculus'... ). So, I politely disagree with your general statement. I deem Nick really a positive influence towards understanding in this weird world we live in. Cheers !

[@playgroundchooser]

4:37 Ah yes. General Relatively. I served under him in the war. Good man, very flexible in his views. It's like he had this gravity about him. 🇺🇲🇺🇲

[@ScienceAsylum]

😂

[@ulti-mantis]

And to think he started his career as a humble specialist

[@traillesstravelled7901]

I'm a dad and approved this comment 👍

[@priceringo1756]

No. He ALWAYS threw you a curve. I swear you had to have a math degree to understand him.

[@dritemolawzbks8574]

Did you serve in the trenches with Schwarzschild?

[@Bodyknock]

Oooh, throwing some red-shifted shade at Veritasium!

[@thomashenderson3901]

Takes some confidence to disagree with Derek!

[@rodhenderson690]

@@thomashenderson3901 good he's a gronk!

[@rodhenderson690]

@@Pobodies_Nerfect Derek is a little arrogant and the fact he's not following Nick on any platforms annoys me because it's passive aggressive narcissism.

[@nguyenhoanglong420]

@@Pobodies_Nerfect GENERAL RELATIVITY IS BETTER THAN QUANTUM MECHANIC

[@DobesVandermeer]

Nerd battle! Fight fight fight!

[@shubhronildutta1563]

The Science Asylum uploads: Me: *Fast Fast* Also video: *FAST FAST*

[@Cappuccino_xoxo]

And the first thinb he talks about is light is actuall pretty slow. Lol

[@sebastianbyczkowski4481]

@@Cappuccino_xoxo Yeah. It is preety slow in cosmological scale or even our solar system scale.

[@franklintangelo3456]

Nick: * does anything * Nerd clone: WeLL aCtUaLLy

[@whoeveriam0iam14222]

well actually it's the same guy in a different costume for the video

[@thenasadude6878]

@@whoeveriam0iam14222 you fool, don't underestimate Nick's cloning ability!

[@judgeomega]

id be happy with nerd clone doing a few videos

[@franklintangelo3456]

@@judgeomega me too.

[@localverse]

Where it turns out, that clone was the real Nick and we've been watching one clone who hadn't realize he's a clone

[@nokian9005]

You're my favorite science tuber. You're the best at explaining things. You have the mind blow of vsuce, the intelligence of Veritassium, you're as unboring and easy to watch as Bill Nye, and your shows have the creativity, effort, and entertainment value of Alton Brown's Good Eats.

[@Baul_Punyan]

To me, the white lab coat makes the presentation seem less personal and more academic than I prefer. The classroom/teacher vibes tend to harden my mind. Whereas, the less cheesy yet humorous and casual rawness of vsauce gives me a squishy anxious free mind. But my wife has a hard time keeping up with the tangents Michael goes on, relative as they are. To each thier own I suppose. Lab coats stress me out though. I hope my criticism is constructive as intended. I mean no disrespect.

[@williambrown1095]

Ah, for the old days when two scientists would become angry, duel, hitting each other with their slide rules.

[@GlenHunt]

Now they burn holes in each other with high power lasers

[@thenasadude6878]

BONK go back to sciency jail

[@luantuan1653]

Tycho Brahe lost his nose.

[@doncarlin9081]

My dad was telling me when the mission controllers were discussing the flyby path for Voyager 2 to Neptune, it was full on vitriol. They had to agree on the path from Jupiter to Saturn to Uranus, but Neptune was open.

[@Kevin_Street]

You're a rock star in this space, Dude. I didn't understand everything you said here but I'm going to watch the video again and again until it all clicks. Your videos are like a super-rich umami stew of science. Where many other channels use the weak broth of metaphors, you actually explain things in depth and with reference to meaty equations. (Even if, thank god, you don't derive them.) You _really_ answer the questions so we learn something, and that's much appreciated.

[@BertGrink]

I have an analogy which helps me wrap my head around the idea of the expanding universe: I think of it as a raisin bread, or rather, the dough before it's baked. While the dough is rising, the raisins contained within the dough move further apart from each other as a result of the dough expanding, but they don't move with respect to the immediate surroundings.

[@istvanszennai5209]

the problem with that analogy is tho, that it assumes an extra dimension (the inside of the bread), whereas in GR there's no extra dimension

[@PatricioHondagneuRoig]

12:08 the ad transition was smoother than the surface of a spherical cow

[@humbledaoist]

Holy shit, a Brasseye reference? My man!

[@Evghenios79]

was it faster than the speed of light though?

[@tmrogers87]

Excellent as always. You provide a really interesting perspective on some concepts a lot of science educators have tackled over time

[@antipoti]

The wedding (?) photo is so lovely! And the content has outstanding quality, as usual.

[@pauldacus4590]

Like beer, this dude is an acquired taste. *Which I've acquired.*

[@Robert_McGarry_Poems]

Mmmm, beer! 🍺

[@xanderunderwoods3363]

Yummy

[@bnice1374]

I have been steadily going through your video's over the past few weeks and I can't understand how you haven't hit a million subs yet. Your video's are very well crafted and easy to understand for people of most levels and I use them as a start off point with my little sister for her school subjects. I even started referring people my own age to specific video's to provide them with explanations that I could never be able to make as simple as you do myself. Goes to show that I have much to learn, because as we all know, if you can't explain it simply, you don't understand it well enough.

[@parmenides9036]

More rants please! That was the best part! 😋 Your actually the best Educational science channel on youtube btw!

[@joaquinel]

Maybe he discovers the lucrative "react" thing. The last I saw, a video of a Korean girl reacting to a video of a Chinese guy reacting to a video of Jamie Oliver making egg fried rice. Fun, and viral.

[@localverse]

@@joaquinel Maybe we fans can start making react videos to Science Asylum clips to give his channel a boost 🤔

[@localverse]

Like, 'Son's reaction as clone's head explodes from insight overload in Science Asylum' And special effects the kid's head explodes after the clone's like a chain reaction

[@patinho5589]

This and PBS are the best two I’ve seen. And that maths one called something like BlueBrown. Oh and that one from Sabine.

[@adityavardhan6606]

E=Mc² : I am the most famous equation . a²+b²=c² : am i joke to you?

[@erenleonhart717]

Also quadratic formula (-b±√b²-4ac)/2a : Kids

[@kylefillingim9658]

I don't always agree with conclusions drawn, but i really appreciate how much effort you make to be as correct as possible, especially when it comes to how terms are defined. I find your chanel to be one of the more insightfull science shows around. keep up the good work

[@AlleyKatt]

Love the happy-happy picture-covered refrigerator in your kitchen. Loved the video lesson. I've "known" much of this for quite some time, but you made a lot of it snap into understanding. Thanks!

[@Nyan_Kitty]

Awesome video =D Seriously, one of my favs so far!!

[@punditgi]

Amazing explanations. Thank goodness for you being so lucid! And the photos of you and your wife are so beautiful and precious. Thanks for sharing! 😃

[@alone-vf4vy]

Plot Twist, we're also as fast as them from their pov

[@ScienceAsylum]

Indeed!

[@josebarria3233]

Ive never think of that

[@Anthony_Matabaro_3D_360]

Yes, excellent point

[@Robert_McGarry_Poems]

They are all standing still, well relatively speaking...

[@__-fi6xg]

Im fast af boiii

[@KeithCooper-Albuquerque]

Another great and funny video! Thanks for the humor, the crazy, and the learning, Nick!

[@xyz.ijk.]

Another great video Nick. Thanks for this -- it was particularly enlightening (sorry), and I'm really impressed with how the graphics have changed over the years ... much more powerful now.

[@ScienceAsylum]

Thanks! I've worked really hard to improve my animation skill.

[@jhill4874]

This is the most understandable explanation of this stuff I've seen! Thanks!

[@XEinstein]

0:49 YES!! We've got a fast fast ladies and gentlemen! Now I'm still excitingly anticipating the next superzoom, Nick!

[@WordsAreJustNoise]

As always amazing video my dude thank you

[@user-bl1pw2th4l]

Still loving your channel, especially when things get deep when the dance music kicks in! You still should have way more views and subscribers! Fast-fast 🤗

[@hallod1]

This channel deserves way more subscribers!! Great science and sense of humor.

[@fourkings7897]

Maybe he doesn't care much about his subscribers or viewers... He's happy as long as he get patreon support..

[@thesecondslit1710]

Indeed. Spread the word !!! I do it whenever I can...

[@mickblock]

As many years as I've been learning about and contemplating cosmology, (physical science in general) its always a Science Asylum video that nudges me past a stuck point.

[@localverse]

Where were you stuck?

[@jooky87]

Amazing, thanks for really opening up the layers of this question. I enjoyed this, and I also enjoyed Veritasiums’s video. Now I want to learn more about what the history of these two different red shifts.

[@shelley-anneharrisberg7409]

Great video! Really enjoy your genius ways of explaining stuff! :)

[@Lucky10279]

"Don't get on my case, ok. I don't get to name these things." Tell me about it! That's how I feel whenever I'm explaining "imaginary" numbers to someone.

[@localverse]

This video did a great job helping visualize imaginary numbers and referred to a proposal for renaming them as 'lateral' numbers m.kzbin.info/www/bejne/imeXaHZ9qNqCjLc

[@pravinrao3669]

I disagree. I see numbers just as magnitude. I see things like -5 , i i^z as a magintude and some extra information we are giving to a function. example -5 magnitude is 5 and the info (whenever this object encounters a + or - sign use the opposite sign. ) 5i == magnitude is 5 and whenever this object is squared give it a negative sign. of course we can just define any number. Raising i to any power is just dependent on how we define raising power of i. But i don't think we should call them numbers. I see math just as logical operations they are objects we use to represent logic. I don't think of them as numbers. I just see positive rational numbers as numbers. Otherwise why aren't vectors numbers. Because every argument we can use for imaginary number can also be used for vectors

[@Lucky10279]

@@pravinrao3669 The word "number" us admittedly vague, but so are lots of words. Try defining "sandwich" or "game" in a way everyone agrees on and you'll see what I mean. But that's not the issue. The issue is that calling them "imaginary" is silly because because it implies they're somehow less "real" than other numbers. It'd be just as silly to call them "imaginary vectors". But we're stuck with the term for historical reasons.

[@thehousehack]

All numbers are imaginary. They are a human construct.

[@Lucky10279]

@@thehousehack Yes, I agree. That's why it's silly to call one type imaginary as if they were somehow more imaginary than the others.

[@philochristos]

That was a really Lucid explanation.

[@stoephil]

Just found this channel. It's great ! Very nice work !

[@thenapdoreast4633]

keep fighting the good fight Nick, some of the best educational content I've seen!

[@nerd8342]

Science asylum uploads Me:faster than light click

[@LuisAldamiz]

You cosmological cheater!

[@nerd8342]

@@LuisAldamiz u can say so...

[@nerd8342]

@Jani Akujärvi i hope i dint break causality

[@drparadox2776]

So, basically what is moving faster than light isn't actually moving faster than speed of light. It just seems like that because of scaling factor.... This was a really great video as always!

[@mrkitty777]

I feel like Schrodinger's cat, I both can be 🥺 or can be 😊 depending I am both until someone observed my innercat.

[@drparadox2776]

@@mrkitty777 good one 😂

[@mrkitty777]

😊 was observed. So the other kitty of schrodinger inside me was 🥺, gotta feed a hamster. Ooh and I watched many cat videos so when you get cat food ads at youtube too, it was probably this schrodinger cay equation. 🤭

[@samuelgibson780]

This is an incredible channel. Thank you!

[@MrStevieJStewart]

This is awesome thank you very much!

[@edthejester]

That's an awesome wedding pic

[@directoryerror6653]

I love seeing science channels challenge the claims of others, a good reminder to take all info with a grain of salt, not everyone can be right all the time and some debate really shows the depth of a subject

[@priscillaallen5276]

This video is chock full of dense data. Wow, so brilliantly explained, nothing overlooked. Nothing on YT comes near. Nobody does it better!

[@wordysmithsonism8767]

Thank you. I am beginning to understand this.

[@dipolifom]

Noone mentioned the causality examples and how great it was. Let me do it now! It was amazing! Also looking for further wife reacts videos. Whatever you do, they are always great

[@adityachk2002]

We needed this so bad ( a new. Video)

[@throwawayuser9931]

Love your content man... Your simple way of teaching so called hard concepts in physics through basic conversation is just wow....Surely deserve more subs....

[@gvibanhez1]

Great as always!

[@altuber99_athlete]

That "fast-fast!" has become a meme

[@uninspired3583]

The image of Nick's face firing that off jumps to mind every time I come across something that's quick. And it makes me smile almost every time

[@namaanda5349]

Wait... It did!?

[@corydharma]

That Veritasium call out hahaha nice.

[@TheBrunchina]

pls sir, may i have a crumb of context?

[@it6647]

@@TheBrunchina Veritasium recently made a video about these shifts And Nick disagrees with a point he was trying to make

[@corydharma]

@@TheBrunchina Science Asylum is gently "well, actuallying" Veritasium's video from a few weeks ago "What actually expands in an expanding universe" (i think its that video).

[@TheBrunchina]

@@corydharma thanks

[@k39716]

Your visualizations are the best!

[@algordon5843]

I think that I understood most of that. Well done Nick. Thanks.

[@definesigint2823]

_Really happy_ about this video recommendation; I suspect I'll be re-watching this as I get more educated.

[@SlimThrull]

This is the only channel I've found which could explain quantum spin in a way that I could better understand what was going on. I'd suggest watching the rest of the videos here. They REALLY are easy to get even without a science background.

[@localverse]

@@SlimThrull Which video helped you understand what's going on with quantum spin? (My vague notion is that quantum spin is merely related to which direction the particle travels in the magnetic pathways of the machine doing the measuring)

[@SlimThrull]

@@localverse Specifically this: kzbin.info/www/bejne/qXOUdoN9otWtr8k I'll admit that I don't REALLY get what's going on, but the video gives me a much better picture of it than any other media I've found does.

[@leapdaniel8058]

One thing I should clarify that confused me a lot when I first learned the concept: The co-moving frame isn't just one reference frame. It's a whole set of reference frames at different points in space. Two galaxies spatially distant from each other will have different co-moving frames.

[@nareshsahu565]

Really love this channel.

[@EricWAtchesVideos]

Another great video! Thank you! I look forward to your exaplining how the cosmological red shift is different from the gravitational red shift.

[@carsonwerner]

Love your easy explanations, and they are packed with info.

[@Lucky-df8uz]

Your channel is the gift that keeps on giving, happy holidays all you asylum watchers!

[@zdenekvalek1538]

Thank you. Finally an explanation that makes any sense! I did not find anything close to that yet and this applies to more your videos!!

[@ScienceAsylum]

Glad I could help 🤓

[@leroidlaglisse]

It all makes sense now! thanks a lot.

[@ativjoshi1049]

Holy shit, the transition to the ad was smooth :)

[@LuisAldamiz]

Sharks are that way: now you don't see it, now you are dead meat.

[@thesecondslit1710]

@@LuisAldamiz hahahahaha

[@Biogenesiss]

In this episode became clear to me how much you improved as a science communicator Ps: Nerd clone FTW

[@Ny0s]

Really nice explanation, thanks for your work.

[@ailblentyn]

Very clear explanation. Thanks!

[@SB-qm5wg]

9:06 ADORABLE!!

[@PapaFlammy69]

Hey

[@NovaWarrior77]

Hey. Wait you didn't mean me? I'm offended.

[@ScienceAsylum]

Hey 👋

[@YounesLayachi]

Wassup 🔥

[@narfwhals7843]

Oy!

[@foldr431]

Omg it’s senpai greeting senpai 😍

[@troyyoung8167]

Awesome explanation. Learnt a lot this episode.

[@SanPendro]

Watching your educational videos is as close as I ever came to the vulcan skill domes :)

[@rickd1412]

I have to listen to these videos 3 or 4 times before I finally get it. This one, maybe 7 or 8 times.

[@Mr-Garibaldi]

7:59 - A new galaxy materializes right next to us. Quantum Tunneling confirmed.

[@manishgant]

Came here for this

[@jskratnyarlathotep8411]

i noticed that too, they're keep materializing here and there all the time \0/

[@jojox1733]

Boom tube

[@nikolastesla3840]

Very informative as always.

[@yuutsu4232]

I've just received your book for my 18th birthday! I'm so excited & now revising all my calculus and phisycs knowledge to give it a shot. Let's just hope I'm not too dumb for this. Greetings from Poland:)

[@ScienceAsylum]

Happy Birthday!!

[@Kevin36914]

As expected, Nick lucid always explain a deep subject with clean and easily to understand. Thanks

[@Ginni14328]

Ooooooo....very interesting.... Love from India ♥️

[@thesecondslit1710]

Best smooth ad transition ever, BTW ! ;)

[@alexvilonyay8597]

Always love the clarity I get from the asylum. keep up the great work I'll be here for the next one... obeying the laws of causality of course...I would have watched them all by now if I didnt

[@storm14k]

I'd seen that Veritasium video and something just didn't quite sit right when I finished. I think you explained it. I need to watch it again.

[@ScienceAsylum]

The things he said in the video were all at least _approximately_ true. He gets away with it because he kept the distance steps small.

[@VinayakYSandimaniEC-ECB]

Which vedio of his are you talking about Can I know?

[@anon3308]

Yeh which vijeo? 🙏

[@Plash14]

Clicked on this video faster than anything else :D

[@quantumgenisisfactor]

Like it! Thanks for both of you. LOL

[@raghu45]

Perfect! Thx for the clarity. Now I understand that it is not an entity has been "pushed" to go faster! It is the more primitive concept of space itself that is taking all the items, at and beyond a critical distance, more and more away from each other at a rate faster than the speed of light!

[@Zagy21]

“Fast Fast” is my favorite youtube phrase. FAST FAST, FAST FAST, FAST FAST! Where is my FAST FAST compilation!?

[@mldag1678]

right??? we desperately need one of those lol

[@Zagy21]

@@mldag1678 we need one and we need it FAST FAST.

[@bcast9978]

"Peculiar" velocity makes sense since peculiar would denote exclusively to one's self.

[@ScienceAsylum]

A few other people have mentioned this. I had no idea there was a second definition for the word "peculiar." 🤯

[@FuturePluperfect]

The Science Asylum It's the original meaning, something to with cattle belonging to a certain place. The second, modern, usage means "foreigners have strange ways" or "we don't do things like _that_ around here, thank you very much".

[@zozzy4630]

@@FuturePluperfect Yup! It comes from the same root as pecuniary ("having to do with money") on the notion of cattle and other property both being a pecuniary measure of wealth, and peculiar to the owner. "Fee" comes from Old English feoh ("cattle") the same way, and the word cattle itself actually evolved in the other direction.

[@regulareric8759]

oh my god dude the segue caught completely by surprise. for a second there I thought you were gonna reveal something even more mind blowing than everything you talked about. nice, very nice.

[@nicholasmills6489]

Just found your channel. Excellent.

[@grouchygeek4176]

THIS is the answer I've been looking for that nobody could give me! Thank you! This has been driving me nuts! Lol I would've loved to have had a teacher that could explain things in as much detail as you do, make it super easy to understand AND make it entertaining. Your channel is awesome

[@ScienceAsylum]

Thanks 🤓 I'm glad I could help!

[@FloccinaucinihilipilificationD]

Light: Speed limit ⭕ Entanglement: Hold my photons 🚫

[@nguyenhoanglong420]

ENTANGLEMENT CANNOT REACH FASTER THAN SPEED OF LIGHT COMRADE !

[@brijeshsingh8460]

But it's not communicating any information to vioate causality Its all probabilistic, in classical sense also it holds

[@SkywalkerAni]

Fascinating. I've heard both that we can't go beyond the speed of light, and that the universe was expanding faster then the speed of light. I've never giving this much thought, so this was a great topic to learn more about.

[@namaanda5349]

bless you for this all knowledge.

[@drparadox2776]

This video was amazing as always. And I'm waiting for more videos like a podcast similar to that you'd upload with your wife. 😁

[@arborinfelix]

Please make sure that before we point a laser to the Moon that we have set laser to stun.

[@kristyanne719]

That's phaser, not laser. Lasers don't have a "stun" setting.

[@arborinfelix]

@@kristyanne719 Live long and prosper

[@williamcollado1531]

This is something me and my freind are currently in discussion with. Thank you for all the amazing content.

[@ScienceAsylum]

Glad I could add to the discussion 🙂

[@warfyaa6143]

10:28 I also was a little bit confused of his interpretation according to my understanding to redshift types, and here is a physics major agree with me. keep it up!

[@anuragjuyal7614]

I want to say that i disagree with Nick on he saying that Derek was wrong. Nick is right about saying cosmological redshift is not same as a doppler redshift but Derek never said that, he said that cosmological redshift is same as a series of doppler redshifts. Add a bunch of bounded doppler redshifts and you got yourself a cosmological redshift

[@priceringo1756]

We know who He Who Must Not Be Named is!

[@aniksamiurrahman6365]

You know Nick I was preparing to go to sleep. But you son of a gun just upped another mind-blowing video!

[@srsairbags]

Awesome content. Subbed !

[@ScienceAsylum]

Thanks! 🤓 Glad you like it.

[@MrSmokeey]

Congratulations Nick!

[@mike814031]

5:00 why does it get so complicated near a rotating black hole??? By the way I love how you do your videos!

[@ScienceAsylum]

Spacetime gets stretched _and_ twisted, so it depends on the black hole’s mass and angular momentum.

[@mikegale9757]

The short answer is, the scaling factors contain ratios, which diverge to infinity at certain boundaries. The scaling factors for rotating black holes are particularly difficult because they have angular components.

[@thenasadude6878]

You open the video thinking you somewhat know the answer Then Nick steps up to the plate and sends you out the stadium A lovely video, I particularly liked the personal referneces and the pace of exposition

[@punditgi]

Another excellent video that raises the bar on lucidity! 👍

[@marxbanger2886]

such a cool video and cool explanation.