The Big Bang Dilemma with Neil deGrasse Tyson
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- čas přidán 22. 11. 2023
- Are we rethinking the Big Bang? On this episode, Neil deGrasse Tyson and comic co-host Chuck Nice explore features of the James Webb Space Telescope, magnetism and how the aurora borealis works, and if the Big Bang is being debunked.
Learn how the JWST is more than just its pictures. What bands of the electromagnetic spectrum can the it see in? Find out about William Herschel and his discovery of infrared light. How does the JWST avoid detecting itself? Learn about features to keep the JWST cool and infrared-free.
Will Earth’s poles flip? We discuss Earth’s precession (wobble), bob, and flip. Learn about the magnetic poles. Does your compass actually point to the magnetic north pole? Are the north pole and the magnetic north pole the same thing? Why do we even have a magnetic field? Discover Earth’s molten core, creating a dynamo, and why dead planets like Mars don’t have one. How often do Earth’s magnetic poles flip? Find out what magnets and aurora borealis have to do with each other. Will something bad happen if the poles do flip?
We explore the frontier of scientific research and what ideas are being contested. We walk through the scientific process and experimentations. What are the core tenets of the Big Bang Theory? Could the Big Bang just be a small piece of a bigger theory? Learn about Vulcan, the hypothetical planet pulling on Mercury that was invented to save Newton’s Laws. When Einstein’s relativity came along, why didn’t Newtonian physics go away? All that and more on another episode of StarTalk!
NOTE: StarTalk+ Patrons can watch or listen to this entire episode commercial-free.
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Science meets pop culture on StarTalk! Astrophysicist & Hayden Planetarium director Neil deGrasse Tyson, his comic co-hosts, guest celebrities & scientists discuss astronomy, physics, and everything else about life in the universe. Keep Looking Up!
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Could the Big Bang just be a small piece of a bigger theory?
Holey Eternal Omnipresent Greetingz cuzinz 🌠🔥✋️😎
Big Bang to us…Pew Pew to the others
@BuddhaJunkee Preyz Gord cuzinz
I rarely ask the AI anything! A couple of months ago I asked AI "can scientists prove" that the big bang didn't happen just once! But a million times, a billion times, endless times! The AI answered me that it was an interesting question and gave extensive scientific data and finally concluded that we cannot know! What do you think? ☺️
pinned 3 hrs ago but posted 13 min ago. some time dilation goin on here
When I'm feeling depressed, watching a Star Talk episode with Neil and Chuck makes me feel much better. Thank you!
weed can also do that
@@goodwillhumping7331I’m doing both
That is right! These guys really put in the effort, episode by episode.
its very fun and interesting to listen to Neil sir, imagine if he is your seat companion on your next flight
I wholeheartedly agree with your sentiment, and I often express the same viewpoint to my friends here in India. He excels as a scientist, speaker, and educator
You can’t imagine how much education I got from you sir.
Please don’t lose sight of your main mission of educating the public, not the scientists.
Continue to simplify so that the like of me digest the hard scientific facts.
Thanks a million
I don't think he reads these comments. 😂 😂 😂
@@massey4business I don't think he reads.
Oh i watched a podcast where he states that he does read them
I can translate the universe with math in a way a child can understand.
if you are interested.
You can always come and find me. The internet is like that.
“I went searching for the Universe and all I found was me”. Love these guys and the Startalk team!
I went searching for an observable fact to contradict my idea to unify gravity. and I found the gravitational constant, the fine structural constant and the speed of light with pi.
@@atticuswalker Try taking the velocity of the universe to the power of ten to the second and pull the galaxies within to factor the friction that causes the spin to mass from the forward motion which creates gravity to the that mass.
What I love about the frontier of knowledge is, we have questions. Once that question is answered after we developed instruments to find out the answer, another question pops out of that answer.
Right? More like ten questions
Have heard it described as a balloon. What we know is inside. What we don't know is outside. The questions we have are the membrane. The more we know leads to more questions to ask, which makes us realize how much more we don't yet know.
For me, if follows with the theory that if you’re ever the smartest person in the room, you’re in the wrong room. Any time you tell yourself you’ve found the final answer, you’re asking the wrong questions.
That Chuck is a brilliant comedian sometimes hides how brilliant and profound his intellect is. "You still see the hubris of human existence...". Oh, boy. That's the take-home sentence of the episode - without disrespect to dr Tyson, of course! His Herschel tale about thermometers was superb. Thank you a lot, great people.
I think the best comedians are the ones who will tell you about all these weird little things that not everyone knows about but are still culturally relevant. Especially if they only reveal them one at a time so that it takes a while to realize how much stuff they actually know about.
That basic sentence was enough to impress? 👀
Chuck’s Boondocks reference… *chef’s kiss* @24:56
Interesting there’s a verse in the Bhagavad Gita where Krishna says the cosmic manifestation happens over and over (emanating from
him and going back to him at the end), as a reflection of what might be a recursive Bang And Crunch
Chuck killed me at "You gon pay what you owe, Santa!" I gotta go watch that again now 😂
I can only imagine the things that will be discovered in the next 1000 years. What's nearly impossible for us will be quite simple for those humans. Great episode also 👍. History will remember your work
Or humans might be extinct.
jesus™ told me that in the next 1,000 years there will be wars, earthquakes and volcanoes.
And maybe an asteroid.
"You can only imagine the next 1000 years of inventions? Mwahahaha puny Earthling, I can imagine 100,000 years worth of inventions in my sleep!"
- Napoleon Dynamite
@@beamboy14526 I seriously doubt it will take 1000 years for we humans to bring about our extinction.
What will be discovered in a millennia, is the ashes of this civilization.
Chuck was awesome with his humour on this episode... syncing beautifully with NDT's science.
Tell me about it ..ptsss 🙄 18:07
He is smarter than he acts! Love you, Chuck! Thanks, Neil, for keeping him on board.
They are a great pairing.
"Let me tell you something Casendra, your hypothesis!? Your hypothesis is trash..TRASH!!" 😂😂
Just to be clear for anyone wondering. North and south polarity are naming conventions.
Historical South magnetic pole = north polarity
Historical north magnetic pole = south polarity
However, if you have a compass needle that points to the Historical North Magnetic Pole ( which is the South Polarity Pole ) you could arbitrarily say that the needle is of south polarity and thus it is pointing to a north polarity pole, therefore the Historical North Magnetic Pole becomes of North Magnetic Polarity. All these are arbitrary naming conventions.
Thank you! I was going to comment but found your reply and it's spot on. North is just a term to indicate direction with nothing to do with polarity. The compass is a tool. If the magnetic pole flipped tomorrow we would just start painting the other end of the needle. North would remain in its traditional location.
Thanks was banging my head against this one thinking I was just missing something 😂
I love the way Neil answered my questions as I think of them.
That's a sign of a good teacher.
I cannot express enough how much I appreciate Chuck's humour, especially since I've watched 3 episodes of Desperate Housewives of any given city, it still makes me laugh! I love you Professor, but I prefer the Hilarious house of Frightenstein collab (w/o makeup, costume and camera operators etc.
I've missed you guys together!
Amazing explainers, as always. Thank you!
Man I need to watch this show more
As it should be ;-P
Wow thanks for the holiday epsiode. Happy Thanksgiving everyone! Stay looking up.
Thank you so much to communicate and explain the scientific method! There are so many, even highly educated people, who don't know this and think that at any time a new discovery might turn everything we know so far upside down (I personally use the "earth goes around the sun and there's no way back since we discovered it" example, too). This only happens in nutrition science and possibly economics, lol.
I was scrolling through the comments and though your profile picture was an eyelash on my screen. It took my forever to figure out it wasn't there
Watching and listening to these two boosts my mood- no wonder what time of the day it is and the kind of depression I am in. Love them to bits!
Always stoked for another StarTalk. Neil is so good at communicating and explaining these topics. And having two people with comedic tendencies makes it a pleasure to watch.
Ehhhh
He’ll yea
Dear Startalk, love your show please do keep up, way more worthy than another 100th "reality" shows and it cold be a long list of those. A couple of thoughts from me though, The Big bang Theory TV series I believe brought people closer to science that is after all not that boring but instead can be very exciting. Question here, I know I'm not an exclusive member just yet (though considering), regarding the Big Bang that was confirmed and widely accepted, in the process, has it been "investigated" what caused it in the first place? If you could tell in percentage points at what percentage scientists "focus" on answering the how and the why, such as 50-50? The reason I'm asking is that I've worked in improving in many different fields and surely the first step to understand the how, but my favourite is still the 5 Why, to find any root cause for any plausible cause. Shall we focus on the why the big bang happened? What chemical or other actions-reactions resulted to we all be here today? Being an Atheist myself this could probably clear the GOD question as well for many people. Thanks and Peace
You realize no one knows that right? What caused the Big Bang (if there was such a thing) implies a cause, a trigger, a before. Imagine waking up in a car not knowing where you are, going 100 down the highway, and from looking out the window for one minute, you are asked where you "started" your trip a month ago. You don't know what country you're in, what a car is and why you are in the back seat with no driver. Some say God is driving, others insist it's Mohammed or Yahway or Bob. This is why I'm an Atheist, nature is too amazing to make up stories. No one knows what happened and there is no reason to think we should know.
@@BariumCobaltNitrog3n Well said.
@@WestEnd_Nightmares818 Thank you.
Wow @StarTalk I can't believe you didn't mention the magma extrusion where seafloor spreading at divergent plate boundaries happens. When lava is extruded at any mid-ocean ridge, the rock it forms becomes magnetized and acquires the magnetic polarity that exists at the time the lava cools. As the crust moves away from mid-ocean ridges, it contains a continuous record of the Earth's changing magnetic polarity.
What I find cool is that they can get a pretty close approximation of how often the polar shift has happened in the past.
Our world needs many more Neils, I love everything about this man.
The world would be much better with out him
@@mr.mclibtard5015*me I’m sure you meant. People like you need to be gone.
Dr tyson and chuck you make my day
when im down thank you❤❤❤
Neil and Chuck for 2024
i recently learned about the molten metal molecules cooling to the poles’ magnetism but in relation to plate tectonics, dating and mapping geological progress on usa’s west coast, what earth came up and shifted from where and how fast, they can tell how far north and south it emerged too though i forget how, it’s also super interesting
I love new episodes of “Stuff I didn’t know” lol my favorite CZcams show 😂
Guys, you are so GREAT, it always makes my day and puts a smile on my face 👏👍😃
Two astrophysicists enter. Only one will leave victorious.
Though, they fight in a tesseract, not an octagon.
They break kline bottles on each other's heads
I’m curious about the magnetized portion of the core. Can the portion of the core that is hotter than the Curie temperature be magnetized? (Maybe the Curie temperature is higher with pressure?) If not, then the magnetized volume would be near the interface bet the core and the crust (or mantel). Also, temperature would be part of the complex dynamics of magnetic pole movement.
An enjoyable Startalk, plus I like to hear Dr.Tyson laugh.
Great content as usually, HOWEVER (I want you to hear the Neal way of saying and moving his hands at the same time ) If you can show that the way the measurement was done was flawed in some way, then naturally to data gathered from those experiments are more or less flawed, thus it is possible to change "existing physics". HOWEVER, for the most parts many of the measurements done are quite robust :D
you missed the point that "experimentally verified science" doesnt get undone or thrown out when new ideas come along. If the experiment was found to be flawed in some way then it would be not have been "experimentally verified science".
You are correct sir! Didnt think it that way.
I was more just pointing out untill the flaw was found it was declared as such -> it makes objective truths. And when the experimental verified science turns out flawed more or less of the objective truths can/will change. The way NTD implied here was that what we allready established objective truths cannot be undone.
But one last point. English isnt my first language so I might have understood that part incorrectly.
Awesome, I love how u guys broaden our horizon (so fundamental)
As the perimeter of my ignorance grows, so does the area of my knowledge.
I’m so glad I found this channel be4 the winter 🥶 starts 🇨🇦🐝
Mr Tyson, sir., you are one of those people that i have respect for without any backthoughts. Can you please explain to me how our planets (Earth) core works? There seems to be a lot of information regarding it but it seems there is more information on all other planets and starts rather than our own planet. How does our planet core works, is it iron and rotates counter clockwise? Thank you sir! Best regards, Peter K.
I keep coming back to the question of the plausibility of the big bang being the result of the formation of a black hole...
At the moment of the collapse, a big bang event occurs specifically within the black hole.
But where matter of black hole comes from?
@@Max_Jacoby intelligent design.
I'm an eagle scout and very into orienteering, I use compasses a lot, I always thought they just labeled the south pole of the magnet in the compass as north
The South Pole of the needle points North. It’s not labeled North because it’s the North Pole of the needle, it’s labeled North because it orients based on the North Pole. Neil lost it on that one.
@@JosephRNalbone okay yeah that's what I thought, that really confused me when he said that
There is a big problem with Neils's argument.
The first problem is his assumption that scientific methodology is the ultimate method without limitation.
Science is based on determining significance based on comparison. For example, when you say a man is big, you are directly thinking of an average-sized man. Based on that comparison, you would determine whether a man is big or small. The same goes for color: You determine whether a color is red based on how different it is from other colors, such as black or white, in a spectrum.
The apparent limitation of science is what happens if the thing you wish to study potentially has no equal for comparison?
We would rationally have a binary option when we talk about the Big Bang and what comes before it. Option 1 is that the Big Bang has another cause, which is excellent because that cause is most likely comparable to what comes after it, meaning we can measure it. It is likely dependent on another cause before it and exists within time since there is a before and after. Therefore, you can study it using the scientific method. The tricky part is since it is measurable, exists within time and is dependent on other cause or causes before it, the cause/causes prior to it would also have cause/causes and this will create an infinite regression fallacy in logic.
Option 2 would be that the cause of the Big Bang or anything prior to the Big Bang, would be an ultimate cause that has eternally existed outside of time because it has nothing before it, independent of anything and everything and, therefore, incomparable to anything and everything in the known universe. How would we study such an entity/cause since our scientific method is based solely on comparison? We would not be able to determine such a thing in the first place because we would not be able to comprehend or even be aware of its existence due to scientific method limitations.
People would say that energy is eternal. However, energy exists in time since it changes from one form to the next in time. We know this because we can measure energy as electricity to heat for example. Therefore, energy can't be eternal because it is also limited to time. So in one point in time, energy must have been created. Infinite regression basically highlights that nothing comes after without the originating cause to the sequence of events. Therefore, universe can't come to existence in Option 1, which means Option 2 is the only logical and rational conclusion. However, Option 2 can't be studied with science because it is uncomparable to anything and everything in the known universe. Problematic issue indeed.
One of my favorites !! Fantastic stuff !!
Amazing results from a seemingly simple experiment, I love that story
Is this a re upload? I swear I heard the same thing already.
@@FacesintheStonewhat did your search results come up with?
@@illogikit's a few different videos glued together.
@@Max_Jacoby Yeah I realized that after watching it
NDGT told the story of the discovery of infrared in the 2014 Cosmos mini series. I guess Chuck Nice missed that episode 🤣
They have both the NDGT Cosmos seasons for free on Tubi, but not the original Carl Sagan mini series. Only thing is they mixed up the episode names and the order they aired. The infrared story is 18 minutes into the episode Tubi calls season 2 ep 4 A Sky Full of Ghosts, which is actually ep 5 Hiding in the Light.
Nice information, I enjoy this show
Just curious, if E=mc(2) and now knowing the rough speed of expansion of space, rough total mass of universe, do we not estimate the total energy of big bang? (Or at least the close estimated amount of energy needed for big bang to occur?) And if we can estimate that, what kind/amount of element and reaction could have caused the big bang? Just very curious
William Herschel, an astronomer best known for discovering Uranus, made significant contributions to astronomy, including the discovery of infrared radiation. His work required foresight in terms of developing innovative observational techniques and equipment, such as his large reflecting telescopes, which enabled him to explore the cosmos in unprecedented detail.Comparing foresight between William Herschel and Neil deGrasse Tyson is a bit challenging as they operated in different eras and contexts. Herschel's foresight was crucial in advancing observational astronomy during his time, while Tyson's foresight lies more in his advocacy for science education and public engagement with scientific ideas instead of actually making any groundbreaking discoveries.
Thank You guys so so much. I Love you guys more than you will ever know. Keep making my day over and over again. Thank you.
That infrared story is fantastic and fascinating !!!
When we see the distant infra red images of early galaxies, is it possible the dispersed dusts and elementary scattering of that/those early galaxies already have contributed to galaxies that appear near in distance and time to us? Or are there other sources of the elementary particles/waves that celestial objects close to us are formed from?
Light from early galaxies is fastest thing that reaches us or it's effects I.e the big bang expansion and cooling forming elements that make up celestial objects close to us and even the elements that make up our planet..
It was a good explanation for the layman! :)
Human ingenuity will never cease to amaze me.
Neil Degresse is brilliant mind, amazing human being and I agree with him in most theory ..98% 🙏
Do you believe little children should change their genders because they heard you could do this at school
@@healdiseasenow No, of course I don't believe it, it's actually a serious crime against children and anyone who does it should be held accountable in court! Don't tell me that he proposed that, he represents, they agree with that? I don't follow him regularly, but if I sometimes hear his opinion about the universe, physics, etc., he's nice to me and he explains it from the heart! But if he supports that small children can change gender, it is unacceptable! It's like tattooing a five-year-old child all over his body because he's "cool".
@@healdiseasenowIs that all you argue about? Argue something *important*
@@NewYork-hi6zdNo, he never said anything like that.
@@MagicToenail I'm glad to hear that 🤗
I love this show. Big props to Lord Nice for the Boondocks quote!
Brilliant and interesting
Tyson explains concepts so clearly and easy to understand
And makes it interedribf
Thank you both. A lot of fun.
Is this a reupload? Cause I seen this video ages ago.
Ever since he mentioned what happens when the magnetic poles flipped and then why we need a magnetic field my brain was constantly going "so what happens to solar winds that travel toward the planet when the magnetic field is zeroed out?".
He glossed over it in the end but I think it would be interesting to have a detailed descussion on that.
There are sound frequencies below the normal range of conscious hearing, so it would make sense to check for light frequencies below the range of normal seeing. However, what is unheard and unseen may serve useful physical and physiological functions.
Science constantly questions existing knowledge and builds upon what is already proven.
enjoyed your thought on science. I would question that anything in science is proven. science seems to say that which is most likely. we seem not to know anything with certainty only that which is most probable. science as all else in the universe is evolving and possibly without direction such as Darwinian evolution. as you stated, science is constantly questioning existing knowledge. this is healthy. whish other aspects of humanity would do the same. thank you for comment.
And some people see that science being progressing towards the truth of reality as a bad thing. Those people are science deniers, and they are constantly strawmanning and ridiculing the fact that in science it's ok not to know something, and that theories can change with new data. These naysayers live in a static mindset where all they can do is accuse others of not being "open minded," on the basis that their claims about reality are unconvincing and unscientific. It's sad.
I've got this sci fi idea i like regarding the Big Bang where what happened was the universe is actually cyclical in the sense that what ends up happening is that sentient life inevitably develops and in its inherent need to fight each other inevitibly ends up in the development of a weapon capable of releasing so much energy that it leads to the destruction of the one universe and the creation of a new one.
Wow, what a tragically dumb fate that would be. I hope it isn't true, lol.
Could very well be cyclic for no purpose at all - regardless of what shenanegans we're up to.
Certainly, we won't be around next time, so throwing some sort of pre-determined human action into the equation it's like introducing an un-necessary complication of the theory.
@@D.Appeltofft did you read the "it's a Sci-Fi idea" bit? You know the first 5 words of the post. 😒
@@thatdudeinasuit5422 Yeah. But, it doesn't really matter what kind of idea it is - it's a quite interesting thought even if it just explain how Universe started THIS time.. :-)
So Awesome how you and Chuck ping off each other, making important scientific topics fun. Appreciate you guys!
I was thinking, "south Latin America bore he all us." Seriously though, dynamos are probably flying saucer designs from that description. EV's for example are very frustrating to think about because thermal heat does power some motors, likely enough to trickle charge car battery. Then there's compressed air blowing into drag for micro wind turbine type options...Now the discussion of dynamo aspects and exploiting UV to heat up air molecules is fascinating conversation.. Though friction heat is already accessible with vehicles if not space telescopes. I liked his only person in universe joke, that's hysterical.
I ❤ Chuck!😂
Welcome to science dome
This is absolutely joyous! Thank you 😊😂
Could it be that compass needled are deliberately coloured/labeled on the wrong end just to aid in the understanding? That is to say, the needle's south pole is the one pointing north, and as a result it's labeled N because it points to the North...
Tyson is great, but lately I’ve been appreciating Chuck more and more. He’s so perfect in his role in this show. His face, his eyes, his expressions-all show genuine wonder and curiosity. The fact that he’s so easy on the eyes doesn’t hurt his likability either! Did I spell that right? It looks like it says lick-ability, which may or may not apply, according to your preferences!
If we are being visited by aliens advanced enough to travel across the galaxy, they probably think it’s hilarious that we are stuck at the Big Bang Theory and haven’t figured out everything about the universe lol.
“They don’t even know what Dark Matter is!” 😂
13:38 I disagree with Neil, Religious people DEPEND on believing what they can't see or prove, otherwise, there would be no religion.
I love Chuck Nice. He makes the show palatable to 6th graders. I'm 54 years old but a 6th Grader at this level of physics.
Niel and Chuck y'all rock! Hope y'all had a Happy Thanksgiving! Peace
I came before the big bang. If you don't believe me, just ask my wife.
BudumpPsh😂 exwife?
So I don't know about the big bang.. but when I started to reverse engineer a simulation game from my imagination to the pc I accidentally found I can actively reverse engineer how our brains interpret the universe at the very least! 😁
Nah, it's just the weed
@morbidmanmusic code that runs and draws graphics says otherwise 🤷♂️ but if you're holding out on me, sharing is caring! 😜
these videos have been some of the most of the most enlightening thank you very much Please keep them coming
Chuck referencing Riley Freeman from The Boondocks trying to hustle Santa immediately made me a fan
I think Karen would disagree. The universe clearly revolves aroune her!!! and she wants to see your manager NOW!!!!!
Would be great without Chuck, he's annoying and not funny.
I really wanted to hear Chuck's version of how infrared was discovered.
Im just wondering how JWST focuses on an object for a long exposure photo, while zipping through space together with earth at the speed of 30 km/s? Is it allowed some rotation to be able to do this?
God caused the big bang
Only if you are delusional.
@@fredbohm4728 what do you say?
@@kvnd6577 Theists have never been able to provide a single shred of verifiable evidence to support their claim that a god exists. Extraordinary claims require extraordinary evidence and theism provides NOTHING!
@@fredbohm4728 so you believe something out of nothing?
@fredbohm4728 I can say the same about atheist..I've heard it all tbh and a cosmic scale designer makes the better argument fr its origin. My faith isn't strong enough to believe something came from nothing
I go to PBS Space Time to get confused by an interesting subject and go to Star Talk to come away with actual understanding. I still love both!
Space Time is the cure for insomnia. His voice is mellifluous.
Fantastic video, really helped me understand ❤
Hey Doctor, I think this is the most interesting and useful video of yours. Really good stuff.
As a VIP...I was surprised to hear him refer to Big Bang as a kpop group 😂
The " BIG THANG (THING) " IS AN EXCELLENT TOOL FOR BEFORE THE BIG BANG. GLAD TO SEE THE INCEPTION OF THE TERM ON YOUR SHOW. CONGRATULATIONS ♥️!!!!!
9:30(ish) - i just realized the link between "F=ma" and "e=mc²"...Force and Energy are kinda similarly defined, equals mass, times how fast something is moving (capped at Speed of Light)
so ... what happens to existing magnets when the polar magnetism shifts poles? Do they point to the southern hemisphere1? I.E. Do our compasses suddenly reverse their orientation and all ships' (Boy Scouts, and others too) compasses start sailing 180 degrees off???
Expansion theory is based on assumption that the speed of light is constant and when you look at light from long, long way away, it should be red shifted only if it’s moving away from you, which is all dependent on The speed of light being constant, which we can’t prove.
Neil and Chuck are so brilliant together.
You answered a question I always asked about 'no magnetic field'
For the compasses, isn't it just more likely that they put an N and painted the south pole of the compass magnet red as a way to describe which way its pointing rather than describing the pole of the magnet itself.
In Hindu mythology, it says that universe started from a singularity and it will go back to singularity. It also talks about other universes.
So? Does it explain how? Don't think so.
Definitely - a creative phase - which is 'serviced' and then comes the Mahapralaya - the great dissolution - and then the next creation.
In ancient texts - these movements - were but the inbreath and outbreath of Brahma - the Divine Personality. Wonderful vision.
Fare thee well.
The Quran says the heavens and the earth were joined together but Allah has separated them. In another verse, it is said that it will be repeated again.
@@mdabdullah1773 The Real Being - will sort it out - always has done - so.
Really - not my field - at all. Thanks.
Fare thee well.
I think on the outer rim of our actual (not observable) entire universe, if you could travel much faster than light, you would find the carcasses of old heat deaths. Random quantum fluctuations create new big bangs and these push the old ones out even further, so that you'd never know they were there before. At some point in time (probably an unimaginably distant future) i think there will be another big bang, which will push the contents of the universe out to the outer edges of the entire universe, and it will just keep happening. Eventually i'd guess that there'd be two big bangs very close to eachother and simultaneously. But this would take an even more gargantuan period of time... A period of time so big it doesn't even bare thinking about. 10 to the power of a number that wouldn't even fit on the screen, years most likely.
Just something i've been thinking about recently.... The universe leaving growth rings, like a tree.
Weird take... And I love it. I've daydreamed similar thoughts. 👍🏼
Hi Neil and Chuck,
I was wondering a couple of things. Was the bug bang instantaneous and previous to that it was a primordial soup? Is that state able to emit photons or light that we can trace back along the red shift with our new telescope up in space? Need some help.
As explained by NDT that after the big bang the entire universe was primordial soup, I would like to add that it stayed in this manner for about 3 hundred thousand years after the big bang. We can't see before this as the all known forces of the universe were merged into one as the temperature was too hot so no photons could have ever travelled without colliding with electrons. In conclusion a major part of the Universe's history has been lost up to that time. Hope all queries about this are solved.
Neil and Chuck are my favorite YTers to learn from. ❤
Another interesting detail is that colors are not a physical property of light; they're actually a biological property of the three different types of cone cells in the retina of the human eye.
Also, other species can have different types of cone cells, which would give them a color palette different from the color palette that the human eye perceives.
I recall hearing in college, long ago, that some insects can see into the ultraviolet and infrared, too. Presumably this could also be true of other non-human species. So their visible spectra can be different from the visible spectrum of the human eye.
The wavelengths are physical properties of light. But you are somewhat right as the labeling of certain ranges of wavelengths are human constructs dependent upon the detection and processing of light by 1) the human eye and 2) the human brain (for example, most humans call 620 to 750 nm wavelengths of light “red”). It is important to remember though, that the range 620-750 nm is a physical property of light which is objectively measurable using non biological equipment
Yes, the wavelengths are a physical property of light. The colors are a biological property of the cone cells. The cone cells translate the wavelengths into color perception. @@joso1195
This really helps me conceptualize science as a whole. I really appreciate this. Thanks!
Not to disagree with the good Doctor, you left out a word in your discussion of compasses. At 25:40, the needle of the compass that points north is not the north pole of the compass, it's the north *seeking* pole of the compass. Therefore, it has a south pole magnetism in order to seek the North Magnetic Pole of the earth.
Not many people use a compass anymore. They just fire up their GPS receiver to tell them where to go.
Wouldn,t it make more sense that south-poles of dipole magnets are painted red to indicate toward magnetic North? ie North was always north, and we just arbitrarily set the orientation on magnets in reverse with reference to the Earth.....?
I love how Chuck just accepts that every day is a learning day...no matter how much he's learned Neil is gonna blow his mind on something or everything
Could listen to Neil teaching me all day long man.
I can't wait to introduce my newborn daughter to startalk, Dr. NdT, and Lord Nice
Dr Tyson, but isn’t violet hotter than red (higher frequency/energy/temperature)? Why did Herschel’s experiment find the temperature rising from blue to red rather than the other way around? What am I getting wrong?
Update: found the answer… tricky! 😊
“The prism refracts light in such a way that the "blue" part is more spread than "red" part. So that overall the energy hitting the thermometer is greater in the infrared and red part than on the blue part of the spectrum.”