Neil deGrasse Tyson Explains Time
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- čas přidán 9. 10. 2012
- What exactly is time? Where does it come from, how do we observe it, and what does it mean? Neil deGrasse Tyson, astrophysicist, host of StarTalk Radio and director of the Hayden Planetarium, answers this Cosmic Query from a fan in this Behind the Scenes video. With comic co-host Eugene Mirman.
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"We are prisoners in the present locked in eternal transition between our past and our future."
- Neil DeGrasse Tyson
+David Friggy pretty obvious really....but well put.
Doesn't mean anything. That is like saying "All even numbers are even numbers". Who cares.
NinjaOnANinja Uh there's a big difference kid lmao
Not really.
Prove it.
David Frig but there is no future.....
*Happy Einstein's Birthday and Pi Day!*
Watch Neil deGrasse Tyson and Eugene Mirman discuss time and Einstein in this "Behind the Scenes" video:
I realise, but I so love him talking about these kinds of things, that I would love to hear him put his thoughts poetically on what dreams and fantasies are in relation to the way we normally of the "space time coordinates" he talked about :)
Startalkradio FREAKING ROCKS!! always has the best guest and i love that intro with the "AWWWWW what what are you sayingg" (by tracy morgan) and then the beastie boys ch-check-it out song.. Freaking awesomeee..
awesome!! thumbs up!
Time is a concept by which we measure relative change compared to a standard system of units. If there was no change in the Universe there would be no time.
But if that's true, time could have never 'started'.
M. Ryan My understanding of the big bang is that we don't know much about what happened "past" it.The only thing we can say is that the current laws of physics didn't apply then. If matter/energy has always existed in some form there was never a "start" to time or anything else.
lewisner love your profile picture
There is time but there is no past or future.....
I've been binging startalk for the last week, i never know it went as far back as 2012 whoa
COOL i did not know this channel even existed! Def subscribing :)
Eugene is hilarious. This pairing is great.
Wish the podcasts were longer
We have a sense of time because things move, change (they grow and decay). We have a way to measure time based in the fact that some of those things change repeatedly with a constant frequency.
longer pls
You called him a TIME LORD!!! :) NEIL IS AWESOME!
I did not know he had a radio station, I just found it on tunein
An act of kindness. Nothing more
this is so good
How have I missed this channel? I love Ambassador Neil deGrasse Tyson. He is absolutely science's best ambassador. Can you imagine having him as a dad?
I was just quite excited about that reference...
I simply love this guy
I've always thought of our brains as time machines for the reasons that Neil describes
I just love hear Neil say the word "Time Lords" His sense of humor is awesome.He knows how smart he is but funny as Hell about it. Just a relaxed calm dude.
Cosmic droppings hahaha. When he talks, its all gold
"Yes Time Lord" nice Dr. Who reference.
You make a good observation, Daniel, when you say it's a "construct of perception".
In a way the question guy does exist in all time because he's been preserved in this video. This particular moment in time has been recorded and can be observed from any point in time now, well only in the future.
Eugene!!! I remember you from a video on Ebaumsworld about how to talk to girls!
"Get on the bus, Gus!"
Now I understand why time is the fourth dimension, so presumably 4th dimensional creatures can move through time like we move through space but observe us locked in our three dimensions as they move through the fourth, and I suppose our view of time is like the shadow that Carl Sagan talked about when he explained dimensions. How cool.
The undeniable fact (both from theory and as confirmed via corresponding experimental observation) that time ticks at varying rates (for a variety of reasons) also explains why Bell's Inequality does not hold in our cosmos. The derivation of Bell's Inequality is based on a tacit simplifying assumption that time ticks at the same rate everywhere and everywhen in the cosmos. Discard that untenable simplifying assumption and the presumptive hidden variable does not neatly cancel out and vanish. Rather it gives rise to a non-vanishing "beat frequency" between two or more particles that are throbbing at independent clock rates.
At the speed of time, the future flies into the past; an instantaneous transition through the infinitesimally brief "now."
It blows my mind.
Quick questions .. why do we consider the spacetime as only a blanket of straight linear spread and that it bends only near heavy mass objects.
Or am I wrong in thinking it like this .
Because then it somehow makes me feel that even spacetime is tied with some kind of gravitational type force with the object traveling on it and then when spacetime bends the object traveling will fall in its curve like it was obvious to fall in some curve because why gravity!?
The more I think about spacetime being a sheet the more it doesn't and at last it ends being a sheet.
Please enlighten me
Time is easy to understand when he explains it. :-)
so Gene Belcher grows up to interview Dr Tyson on the radio... Bob and Linda must be very proud.
The comedian is a foil Dr Tyson uses to help break down complex answers, the logic is if the person opposite can understand so can people who are not as science literate as those who go out of their way to learn.
It increases the audience.
So given that the universe started at a singularity and is expanding at the speed of light, would any time have passed at all from the perspective of the universe?
there's a few problems with this idea:
1. the idea that something moving at lightspeed somehow changes a man-made measurement such as time is invalid,
2. the universe (most likely from what we understand of the observable part of it) does not have a "perspective", it is a void in which things exist. and finally,
3. the universe isn't expanding at the speed of light. the speed of expansion has actually slowly been climbing. so being that there is never and presumably HAS never been a constant rate of expansion for the universe, yes. time has passed since the big bang; about 14 billion (say it again, BILLION) years.
The acceleration of the expansion of the universe will cause it to eventually pass the speed of light.
Specifically how can we relate to the experience of an inner perception of extreme slowness or "slowingdown"? In the sense that all inner words, perceptions and experiences are of extreme slow motion, yet the external reality seems to be moving at a "normal" pace. Sheikh.
he just said that our ancestors noticed something repeating (phases of the moon, etc) and decided to measure how long it took until it repeats again
Open challenge has been sent to almost all professors of physics & universities and so far two retired professors of physics namely Jeremy Dunning-Davies of Hull University & Brian Cole of Columbia University accepted the challenge but both of them finally failed to show a single error in the articles on the basis of which open challenge has been put forward. In this regard exchange of articles between me & Jeremy are available at vixra, General Science Journal & Elixir Online Journal.
Time is change and change leads to becoming, unless you don't care for yourself. In that case, time is plain entropy. So the important question here isn't "what is time?" but "what do you do with the time that is given to you?" That is the difference between knowledge and wisdom, my friends, and the second one always beats the first.
Now i'm more interested in the psychological reckoning of time. What makes time seem to pass more quickly or slowly? What about our sense of direction in time. Is it just that the biological processes in our brain are irreversible so we cant sense as the past as we do the present?
I love that he said time lord lol
time is my gray hair.
~Right.
gravitational distortion is difinitive, it can be observed and measured.
So is time and space really just the same thing? Is time simply the name we give to the physical movement of particles from one position to another in a sequence? If all particles in the universe were to suddenly stop moving (apart from the observer of course!) would it be fair to say "time has stopped"? If the rate of movement of particles is slowed down, you could also say time is running slowly (to an outside observer) but to those within the slow moving space, "time" would just be running normally to them.
Man he sounds like Eugene from Bobs Burgers.
That's because he is Eugene from bobs burgers
and bob from bob's burgers sounds exactly like Archer. uncanny!
What is gene belcher doing here?
I was just about to ask that myself!!!
same thing he does on bob's burgers...ruining it.
I'm quoting the movie, Taken.
I'm just glad he said time lord at the end =D …Dr. Who anyone?
Dr. Tyson you are what is right with this country...
Some years ago I heard a nifty definition or explanation of time: a manifestation of change. What do you think?
sounds about right. time is a result of the direction of entropy. that is a popular expectation of how the universe will end. "heat death." when things no longer change, there is no more time.
Yes, time lord! LOL
Used this to win an argument against a girl claiming time isn’t real. Neil. What a guy.
You do exist in all time. Every iota of time has everything in existence inextricably wound into itself. It can never be un-wound, and it is the one aspect of our human life that is truly eternal. Our every action is written indelibly into the very fabric of existence. Act wisely.
A good argument of time space interlacing.
"Yes time lord" LOL
If the present is the transition between past and future is it fair to conceive it to have no measure of time? Only position. Like the equator on a line of longitude. If so being locked into the moment would disallow freewill, without time to undertake any conscious process. We would inherit a past we cannot change and lack any ability to influence the future. It is a deeply troubling concept.
Agreed. Neil deGrasse Tyson is a true American hero.
Time exists, we simply measure it.
Yeah, time is just a coordinate on a galactic map at a certain place. Well said Tyson.
I'm not Neil and I'm not a physicist of any sort, but my armchair reading of physics is that, yes, time and space are very closely linked and may, in fact, be the same thing. That is why the term "spacetime" came into being. It's not a silly bit of sci-fi technobabble, it's an actual scientific term. Having said that, I would dearly love for the far more qualified Dr. Tyson to answer your question himself, so, in effect, I'm just seconding your question. SO HOW ABOUT IT, STARTALK?!
time is; the speed of individuals relative to your viewpoint. time is just a reference term but yes speed and action are real phenomenon.
the real question is mathematics, is dividing individuality of objects real or just perspective? (*if I cut off my arm, is my reference of it still being part of 'me' truth or just opinion) and the answer to that is paradoxical since everything has different perspectives. truth is then defined only as continuities (weather we agree among each other about them or not).
Nice, very articulate, 'ass', window' and and 'damn' in one sentence; well done.
It seems to me that if you write your opinion on a public forum you might expect a comment or two.
A day is one revolution of the earth on its axis. Our labelling of that revolution is our method of measuring the speed of that revolution and the distance travelled by a particular spot on the earth during that revolution. So, yes, time is our method of measuring speed and distance. The earth and its motion exist independently of our minds, but our measurement of them is a product of our minds.
He said "Time Lord"! I hope that's a Doctor Who reference!
Aha. Sarcasm. I missed that. lol. I went to the page and it looked like word vomit after salad. I don't think any message can be conveyed; I started having spasms like the cartoons used to induce.
I tracked my internet path one night to see how I got from where I started to where I ended up. I noted the thought processes that picked the next link. You can end up some crazy places when you're bored. That story has no point. ;-)
Our idea of time being measured in seconds and distances being feet or meters are completely arbitrary. We use them because they make sense and help us understand the universe around us.
NDGT truly worthy of the mantle of Carl Sagan's successor
Me!!!
Anyone else thinks that guy sounds like Archer?
lol he does tho
He WAS on Archer. Two episodes.
So what?
Jeremy Stuut as cheryl carol charlene's brother! lol
He sounds like Gene from Bob's Burgers.
Yeah, a clock's a way to measure time within our frame of comprehension, but not detect it. I'm sticking with Liebniz! :)
Time exists to confirm motion. Time is the first clue to understanding that everything is in a constant motion. when we observe that the sun rises from one one end of the horizon and sets on the other end, we can tell that we are in motion and time helped us become aware of motion because for example the sun was at one point at a certain time, and then it was at a different point at another time. time confirms to us the existence of motion in the universe, everything is in constant motion, we are vibrating, the vibrations have a particular frequency, the vibrations hold everything together, what caused the vibration and why has it lasted all this time even now, where is it, does it originate from a single point or no single point, what can cause it to stop, can it stop, will there be a time when it stops, can we change the frequency of the vibrations and what effect will that have to our universe
Another easier way to depict that is through a flip book. If you look at the first picture it looks like nothing is moving, but once you start flipping through it over time it looks like a movie because it has motion to it now. You could think of your whole life being a flipbook that has a first slide and a last and it can all exist at once to an observer on the outside but what we experience is the turning of the page in motion.
True, and a very good example btw.
No, I said we measure time within our frame of comprehension (a simple clock). And I said gravitational distortion is our own perception, not definitive. Good try, though. As for psychobabble, if you place the TV scientist's beloved soundbites over the work of Liebniz, I'm talking to the wrong person about complex scientific subjects.
very respectful on the matter... I am not an expert...
If we arrange a meeting in 3D x,y,z space, I will only meet you if we also combine time, 4D.
As everything moves since the big bang, time is intricate to spacetime and its movement.
There is movement there is time.
Time is a dimension created by our observation, between two points in a dimension that is not the dimension of time itself.
We say that it is cyclical because it is used to the clock, electrical sinal waves and sunset, events that are repeated.
If the frequency is equal to 1/T. The time is 1/f , so 1s for a frequency of 1Hz. 1 scalar cycle which is going from 0 to 6.28 scalar on a circle of radius 1.
We always relate time to some cycle, but for me, not an expert, what matters to define time is spacetime.
The observation of one or more related dimensions, plus the dimension of time.
What if time doesn't exist?
What if time is nothing more than a mental construct the mind employs to differentiate memory (past) from experience (present) and intuition (future)?
How Space and time affecting bio mechanical substance
what if time worked like fundamental forces of nature , will it still be same or will it be different?
OK. :)
Eugene Mirman! Bobs Burger!
Time is a measure of relative change. If every subatomic particle in the Universe stopped moving or changing there would be no time.
*What is right with the Cosmos :D
Standing open challenge is open to all physicists including those who have no science. The axioms of physical science have been proved wrong on the same premises on which the same were adopted.
What is this quote from?
"We are prisoners in the present, locked in eternal transition between our past and our future."
No way he just came up with this, though if anyone could it would be he.
Sir, no knock to your audio department. you shouldn't be speaking in to that condenser mic.. It does nothing for your voice.. Tell your Audio technician, i should be speaking in to an EV RE20.. It would make you sound huge, not thin..Because it's dynamic so is subject to proximity effect, unlike your condensers. suggest it to your sound man. You deserve a great radio voice, giving all these amazing facts!
I think that "time" is a convenient contrivance of human beings to distinguish change and motion. We exist in a single moment. There is no forward or backward button on the universe. The universe is thought to have begun with a kind of explosion and it may end up ultimately collapsing upon itself to create another uncontainable point which will then explode and repeat a possibly endless cycle of expansion then contraction. Even with all of that, there will only be one, maybe eternal NOW.
If time boils down to something that repeats, who/what started the clock?
HD
I kept waiting for him to say that. Hoping against hope.
Time🤔
Is there a time where time ceases to exist but we can still be aware of it?
If it ceases to exist then you can't be aware of it.
A better question is did time exist before the big bang, or did the big bang create time? And an even better question is "Is the big bang still creating time?" Burn, brain, burn!
You can only be aware of time in reference to something else. Eg You are aware of time as the leaves blow around in front of you by the wind. You need change around you to be aware of time. You standing with no outside stimulus are still aware of thinking and that is a changing stream of thought so you have an awareness of time passage. Without change there is nothing to distinguish one time to the next or the travel from one to another so no reference for time so, no time.
of course time existed before the big bang, because without time you have timelessness, which is eternity. it is thought that the universe has not been here for eternity, so it wouldnt make sense to imply time needs our universe to exist. there must be time for an event, even motion, to occur
blazingshadow fuk
Is the host the Russian brother from “Delocated” ?
Neil deGrasse Tyson for President!!
It's half past 2
Time exsists to prevent everything happening at once.
Like he said, the physics of time is separate from the psychological time.
Prove light and sound to deaf and blind people? C'mon, 2Rob, that's a little desperate. :) As for your ability to slow down time - impressive! Gravitational time distortion is only our perception, what we call it so we can understand it. Remember, time is a human invention, a coping mechanism. Check out Gottfried Leibniz' view on the subject. He tells it a lot better than me.
It's amazing how Neil deGrasse Tyson makes every normal IQ person around him look sooooo sloow and stupid. His explanations are so clear so when people around him try to say what they have understood they just look kinda needy for Neil's approval. I think that's why a lot of people around him may seem a bit annoying hahaha
+Jorge García Rojas ~ I know that is why I feel the people around me annoying.
Rarely is it that I find I am not the most intelligent person in the room.
When I am not, I usually end up locked in conversation with the one who is.
Otherwise, I poisoning myself with alcohol to bring my intellect down to their level and have fun at the lowest common denominator.
"Rarely is it that I find I am not the most intelligent person in the room." ....you know who else think they are the smartest person in the room all the time? stupid people.
Jorge García Rojas and anything he say isn't true all of the stuff about time travel is his imagination of his experience of learning of physics and all this is one way to look at the things ....u can look at time in ur own way ...yeah so u can consider this man smart that he allow his imagination to create a possibility but whatever he say isn't true but we jUst consider it true becaue we don't wana thing about time and all shit in our way and we don't let our minds to construct a possible reality .....
That's an extremely negative way to look at this. If a guy knows something and you want to know the same thing from him then you ask him. It's like going to a car mechanic and asking him about the problem of your car. You have to confirm that you understood what he's saying so in that way you always sound needy near the "high IQ" of the car mechanic because of your zero intelligence.
He is a national treasure
Has anyone ever questioned the interpretations of the Haefele-Keating experiment?
Sure it's an observed fact that the clocks show a different time.
The principle fact established by the experiment is that the clocks did not work the same over the duration of the experiment.
You can say speed changes a clock
But isn't it a broad assumption to say it proves speed changes time for the observer?
What if the energy driving the clocks changed over the duration of the experiment?
What if the mass of the clocks changed over the duration of the experiment?
If neither changed then both clocks would show the same time record
If both changed in equal proportion then both clocks would show the same time record.
If mass or energy changed and the compliment of either did not...
Or if they did not change in equal proportion...
The clocks would show a record of different time due to the change in vibration frequency with no actual change in fabric or experience of time itself.
If you increase the mass of the clock without also increasing the force driving the clock
it will of course slow down.
I think the simplest interpretation of the Haefele-keating experiment beyond the self evident observation of the clocks recording a different record... is an overlooked interpretation that mass and inertia might be the same thing.
currently we limit ourselves to think of mass as inertia regarding acceleration and when inertia is aligned with gravity (gravitational acceleration)
I don't (I never used to) think of inertia as mass when the inertia is tangential to acceleration. That could be a mistake.
The logical answer is that this is the first time line ever to exist. We could invent time travel one day and go back in time. But we aren't seeing time travelers because we are in the first time to exist so the future doesn't exist yet. Am I wrong or isn't that the logical answer
I'd rather say that this is the only time line your conciousness is able to experience. ''The Source'' that created this universe/multiverse is supposed to be absolute and endless in all the posible ways. So, in the same way space and time here are endless; there must be an infinit number of time lines going on in parallel dimensions or multiverses too. We might never prove it scientifically for obvious reasons and the physical limitations of our world and our brain capacity, yet that doesn't mean those parallel worlds do not exist.
weird sense of humor when the word I supposedly misspelled isn't even in my comment, and unbeknownst to you I was joking...