Carl Sagan - Cosmos - Traveling - Speed of Light

Carl Sagan - Cosmos - Traveling - Speed of Light
Copyright © 1980 Druyan-Sagan Associates, Inc.
Copyright © 2000 Druyan-Sagan Associates, Inc.

[@WrestlingHeretic]

I used to watch this happily with my parents when I was a child. I remember this scene very vividly. I'm amazed to see it again on youtube after all these years.

[@freshtoast3879]

How's life been these last 11 years?

[@dragospahontu]

@@freshtoast3879 it's getting worse

[@freshtoast3879]

@@dragospahontu no doubt

[@nielspemberton59]

Hans Zimmers "Leave No Man Behind" from Black Hawk Down would be perfect music for this sequence. For people to benefit from relativistic space flight @ near light speeds they must go on the trip

[@henrynoone3595]

So you believe if you say vividly you become as smart as sagan?

[@Novastar.SaberCombat]

The world REQUIRES more people like Carl Sagan. Let us all find more ways to cultivate and to nourish people like him. 🙂

[@SincereSentinel]

Hear, Hear!

[@CaptFoster5]

I started reading Sagan's The Cosmos to my now 1 1/2 year old granddaughter a couple months ago. I shall begin to have her watch the series this Summer in between our time in the backyard garden.

[@The_Bad_Guy.]

"Pauulo says good bye to his little brother Vinchennnzo" I don't know why but I love listening to him say it like that haha. He almost had somewhat of a regal way of speaking

[@michaelschramm1064]

I still recall getting a chuckle out of that when me and my mom watched the original airing of Cosmos. Always had to be SO precise. The best occurs when he enunciates the !Kung tribe of the Kalahari-he must have practiced in front of mirror for hours, because the proper naming requires a special “clucking” sound with the tongue and the roof of the mouth. What a hoot Carl Sagan was!

[@stu3131]

Paulo got places to BE

[@elon-gatedMusk-rat]

Hilarious comment. 😂

[@philipstevenson5166]

italian restaurant service slows down at noon. great presentation to make it memorable. and also a bit of cultural exchange.

[@bo0tsy1]

We hear an audible red and blue shift everyday as a sound wave. Listen to a car traveling on a road. You hear a high pitched noise as it approached, you hear an almost "exhale" lowered pitch as it passes. You have witnessed the effect Sagan is talking about. If we are in that car, our field of vision narrows due to speed relative to a "static" earth. Such a great video, thanks.

[@ThyNazgul]

Yep the Doppler effect affects light waves and sound waves :D

[@ReductioAdAbsurdum]

> If we are in that car, our field of vision narrows due to speed relative to a "static" earth. No it doesn't. The effect Carl is talking about, where things that are behind you appear in front of you, only happens at very near the speed of light. It doesn't occur at the incredibly sluggish speed of cars.

[@PrestonGarveyofthesettlements]

Mind=blown.

[@DiazdelVivar]

there's agood example about this. Imagine you watch a clock; what you see is the light that goes to the clock and then to your eyes, so you see it's moving; but if you go to the speed of light wlaking away from it and watching it, you'll see the same time always, until you stop, because you're going at the same speed of the image you received when you was in front of the clock (of course in real life you wouldn't be able to see the clock because of the distance, unless is a big star size clock)

[@lncomus]

I think there's a bit of an inconsistency here. Of you take a drive around your town close to the speed of light, it's not that you will return decades later, it's that your journey will be near instantaneous. Light can travel around the Earth 7 times in 1 second, thus in order for your trip to take a single decade in Earth time, you would have to drive around the equator over 2 billion times. Just that for you, it would take progressively less time, the closer you are to the speed of light.

[@lncomus]

Not to mention, that the Earth would be destroyed

[@grantmonsma3569]

That's the hard part with trying to illustrate anything related to the speed of light: it's so fast that you either have to contend with incomprehensibly vast distances or incomprehensibly short timeframes. Here I suppose they tried their best to sidestep the issue by focusing on time spent traveling, ignoring some other consequences to keep it in a familiar frame of reference.

[@shawnshawn2699]

Easy there Gods-speed-y-Gonzales!

[@TheSilverGate]

That's some special Vespa right there

[@ray123ification]

we cannot observe reality directly, we are always slightly behind, waiting for the light to reach our eyes. maybe the 'answers ' mankind search for are in this delay. at the moment all we can do is look into the past.

[@SigveGrevling]

Yes. Though 1000 years would have passed to the rest of the world.

[@McconneIIRet]

0:53 When she says her parents aren't home:

[@aronyak1]

That must be some really souped up Vespa.

[@Dendebend]

@BranZyme there was a miscalculation in the test. also neutrinos are a subatomic particle of an atom.

[@Dendebend]

@ALackOfLife good point.

[@Ilikemustard]

In fact I was going to give an example using the equation T1 = T0 / sqrt(1 - v^2/c^2) but my calculator could not deal with such small fractions and I ended up getting no time dilation.

[@blithium]

It's not affecting the people around you at all. It's affecting YOU. You are still taking fifty years to get to point X, even though you only aged by five minutes.

[@UHFStation1]

I wonder if expanding like an explosion at the speed of light would cause an object to be zero dimensional and omnipresent.

[@cjs2964]

Fuck, I want one of those scooters.

[@cinoeye]

Would this happen if we send a spaceship without humans? Paradoxically if two ships race from the same random spot in the universe at the speed of light and one slower, would the one that travels slower paradoxically arrive to earth before the one that travels the speed of light?

[@urb3stm8]

I would have thought that the boy on the bike would have come back from his trip in an instant in the eyes of his brother and the brother would have been the same age.

[@privatewins5856]

This is why it’s so fascinating. That’s not what would happen due to the speed.

[@darthvaderyoda]

So, if i was a passerby, would i see the biker as a super slow being, or a super fast being?

[@ReBear2008]

No to you is the same 2 sec, to others they thought you are having a pee shake

[@marshall9doom]

@Mark2790 Radicals to be exact, radicals..

[@TheLastFm]

just watched this high as fuck, no idea of what was happening

[@openseas11]

Smoke more and get higher. Do what you're good at. This is beyond your brain power.

[@openseas11]

***** well only dumbfucks and the uneducated like yourself smoke weed. The hippies in the earlier times most likely were your parents. Correct punkbitch? Yeah I'm correct.

[@openseas11]

***** no actually i don't work at any restaurants. I am better than that. Certainly better than you and your mom. However, they say one only gets angry at someone who is better than them... so up yours bitch

[@openseas11]

***** and you most certainly do not have a PhD, unless it's a PhD in shity toilet cleaning that your parents do each day, than yes i can see that.

[@TheLastFm]

Krazee Eyez Killah Jimi J ***** What a result my comment made guys - thank you. Also Jim, I don't even smoke that much weed but I sure do watch and learn a lot from Carl. The only reason I decided to combine the two was because I carried my interest in Sagan further, and found out that he smoked some (but it's probably hyped about how much he did it) and curiously thought it would be interesting to put myself into a position he might have been in. The funny thing though is that my comment was harmless to some, but obviously enraged others. We're sorry for you Jimi J.

[@JourneyXProductions]

If going the speed of light were possible, would we be able to create a bending of light particles to go faster than the speed of light, In theory it is still possible to go faster than the speed of light because little molecules, or atoms, called neutrinos go in front of light, like a start of a storm. If light and matter was subject to change, could we defy gravity as well?

[@Lorbera]

Is this why in Tron everything was blue and red?

[@L3G3nD0001]

There is a theory in which you could able to go ahead into the future if you go orbitating the earth at three speed of light, Clockwise.

[@kerrodconnolly5338]

Paulo stole carl sagans LSD

[@Corcoancaoc]

no. the speed of gravity refers to the speed at which a gravitational field propagates, and is the same speed as "c" = the speed of light. the theory that you refer to is newton's, which implies that gravitational force is instant. but in 1847, Leverier noticed that this was NOT the case. so.... speed of gravity = speed of light.

[@itubeyoudont]

So Neutrinos (supposedly) travel back in time? :0

[@Baburote]

But it is like the two trains moving in the train station - is it my train or is it the other train that is aktually moving. If you focus on the biker - is it he or you that are traveling at the speed of life - if you think that it is you (by some od mirrakel) - then all the time effekts would be reverse - he would be older - not you...

[@djredi]

i rekon the agents in matrix are based on carl sagen his voice gaps lust remind me

[@yashwardhanjondhale]

Science Celeste

[@Ilikemustard]

Yeah, but the amount of time you will save would be so miniscule it would be pointless.

[@audiojunkiehu]

It seems to me certain types of energy travel faster then the speed of light. It is not subject to size or direction, instead i feel a natural phenomena which many people experience to some degree, but may not be conscious of it. I find the critical drivers to consist of (1) intensity-weak or strong (2) direction-strong(er) or weak(er) (3) pull (towards) or push (away), hence contract or expand, attract or reject, etc. A state of neutrality works only in a swiss built universe:-) THK YOU CS

[@cliffhughes6010]

Carl Sagan was a genius at communication.

[@michaelschramm1064]

Perhaps the greatest science popularizer of all, even possibly a level up from Isaac Asimov.

[@astrodyte8199]

He was uniquely sincere, with all the competence in the world.

[@leokimvideo]

I understand how Rick Springfield seems to never age a day from this Cosmos episode. Rick must be always travelling near the speed of light. Rick is in his mid 70's yet he looks 20 something.

[@liarliar1408]

I saw it when I was younger n today 2022, I'm now a data scientist for NASA. Carl influenced.

[@michaelschramm1064]

That’s awesome! I was also duly inspired by Dr. Sagan-went on to read 9 or 10 of his books, then read Asimov, Wheeler, Kaufmann, Gribbin, Hawking, Calder and many more-and became a soil scientist in the employ of the USDA/NRCS for 32 years.

[@HighOverlordSnarffieBeagle]

This is my favorite part of the entire series. As a kid in the early 80s when I was 6-8 years old I watched this and left it with a far greater understanding of science than of people I knew in my daily life. We didn't have the word Autistic then so I didn't know I was that but I had no idea why people did what they did but I understood this stuff.

[@wa27]

How did his brother survive all that time on the bench? What did he eat? Where did he poop? I hope the new version of Cosmos answers these loose threads.

[@flashlk]

Obviously, younger brother Vincenzo did not stay on the bench for fifty years. While Paulo took his relativistic ride, Vincenzo went on with his life, but returned to the bench at the same time every day, waiting for Paulo to return. The time dilation effects of special relativity led to a poignant reunion.

[@foxyshabazz]

I was a little kid when this was on telly. I loved it, and I'm not sure why, because I hadn't really any clue what that Carl Sagan fella was going on about. But I remember I found his voice comforting, maybe because I thought he sounded a bit like Kermit the Frog at the time (though he doesn't really, but then again I am foreign). And also I liked Paolo and his magic red/blue scooter. A slice of my happy childhood suddenly in my mind again. Thank you for posting this video and giving me that.

[@QuicknStraight]

So brilliantly explained in simple terms. Cosmos is still, today, one of the greatest popular science shows ever made.

[@btp5035]

Paulo should wear a helmet if he's gonna go that fast...

[@noelxcore1337]

If hell is where Cal Sagan is, that's where I want go

[@estebandelafp]

Did this guy just acted as Vatican police against a harmless joke?

[@Kgio-2112]

No you dont

[@johnpaulmccain4668]

Hail Sagan!

[@marcikeesler6060]

I believe he was commenting on the fact that Carl Sagan was a self-described atheist.

[@JimTLonW6]

Totally fascinating; everyone should watch these vids!

[@talking1717]

Italians sure know how to make a bike

[@ivanbattaglinobattaglino8063]

Carl Sagan es un científico fascinante, por su trabajo (incansable) en la investigación y la divulgación científica en los campos de la astronomía, exobiologia, radioastronomia, la investigación de las ondas del sonido (el efecto dopler), el viaje en el tiempo a la velocidad de la Luz, (como en este caso del vídeo), la vida extraterrestre inteligente más allá de nuestro planeta tierra, y tantísimos otros temas muy interesantes, les envío muchos saludos desde la provincia de Buenos Aires República Argentina 🇦🇷

[@dansharkhunter]

What a legend Carl Sagan is... World needs more like him!

[@That_Freedom_Guy]

Carl Sagan agrees with you! That's why he wrote books and starred in television shows, he wanted everyone to think critically as he did. It's up to us to embody the Sagan wisdom in ourselves as well as waiting for another Sagan type scientist to take Carl's old position.

[@Nerdfighter21]

My father introduced me to this video when I was about 12 or 13 years old. I was old enough to understand what they were suggesting, but not quite old enough to stick around long enough to realize that we can't really travel at the speed of light yet. So, naturally, I went and got my scooter--motor powered. I considered replicating what I'd seen here (or attemtping to) but then decided not to, because I didn't want to age so slowly while everyone I loved aged and withered away.

[@RevStaplehurst]

Can still remember watching this as a kid and being blown away

[@atomixfang]

Only after I saw interstellar I realised how hard it would really be to experience something like that.

[@shaquadradeloiserussell8659]

that is science fiction. travelling far into space will not change how fast you age. if you are 40 and it takes you 60 earth years to fly somewhere, you will still be 100 by the time you get there, and will look like it too, if you're not already dead from old age before then. If you could fly to that place in 1 minute, and be back in 1 minute, you and everyone else on earth, would still be 2 minutes older than you all were before you left.

[@SiphiliSx]

​@@shaquadradeloiserussell8659if you traveled away from Earth at light speed for 1 minute, then return to Earth at light speed for the same amount of time almost 100 days would have passed on Earth in those two minutes.

[@SiphiliSx]

Theoretically

[@shaquadradeloiserussell8659]

@@SiphiliSx No it would not have. One Earth minute is still one Earth minute, regardless where ever you are in the universe.

[@rocktoasted]

Love Carl Sagan...RIP...

[@hooper365]

This is honestly too elite a mind

[@Cerulean0987]

I suspect Sagan would have loved the news that neutrinos may go faster than the speed of light. He would not have focused on what was wrong with his earlier point of view, but what the implications of this new discovery was. He would have considered this information the best information available at that time, and that's ok.

[@Runner2001]

This episode got me hook on Cosmos and the speed of light.

[@trespire]

Il tipico pilota italiano, che sfreccia e infrange tutte le regole del moto relativo. È questo il segreto della longevità?

[@pctopgs]

I dont want anybody to think that they would be in some kind of twilight zone when traveling close to c. To you, your watch is ticking normally, to an observer, your watch ticks very slow.

[@likable72]

Where can I get hold of the complete series of the cosmos by Carl Sagan ?

[@shaquadradeloiserussell8659]

Amazon...?

[@crumplezone1]

We all will eventually die and become space dust again, this is a certainty

[@petegarcia5324]

Fantastic video....Watch it!!

[@sparticle1983]

If you travel in a spaceship with a speed close to speed of light, then time would go by slower. You wouldn't understand that. You would see your clock clicking normally. You would get hungry as usual, your nails would grow as always after some days. Or actually what is "day" for you. If I was outside that spaceship, not travelling with your speed,but still able to see you, I would see a man almost..motionless! Everything you would do in a perfectly normal way,I would see it like in slow motion!

[@sootmancer9851]

the younger brother was basically Hachiko

[@tasteetaste]

He definitely DOES sound like Kermit the Frog

[@BuddhaMUD]

@manwithouthat44 man i love his voice

[@freesaxon6835]

I wish I could travel back to those times, god I hate 2022

[@starstheory]

Not unless we can travel at the speed of light

[@AnFmusic010]

this just blew my mind lol

[@baxill23]

@theseaotter He was a master at explaining brilliant and complicated thoughts and ideas ina way that common folks like us could understand and that's a rare gift.. hopefully there will be another like him..

[@ricksky3111]

If you held a mirror in front of your face while you traveled at the speed of light would you be able to see your reflect? The Church of Sagan! All hail Carl! CC!

[@micshaz]

amen

[@shaquadradeloiserussell8659]

Until you know what its like or have the ability to travel at that speed, you have nothing but speculation.

[@8bit_paul]

Wonderful to see this again 43 years later, I think Mr. Sagan prefaced this by saying "imagine the speed of light was 60mph" or some such thing?

[@talastrifekalayaan]

Traveling at the speed of light. Awesome. :D

[@randy95023]

If Paolo's Scooter got 60 miles per gallon, and he traveled the Speed of Light for just 10 minutes he would need a fuel tank that held about 2 quadrillion gallons of gas! What a great video. Mind expanding to think that Time does pass at such different rates and some brilliant minds discovered this with just pencil and paper (or chalk and blackboard) to do the requisite mathematics...

[@flashkellam7395]

Just as Carl Sagan had a “magic camera”, Paulo had a “magic motorscooter”. All to perform the “thought experiment”.

[@RobCLynch]

Figuratively speaking, if somebody was at the top of an escalator, they would age more slowly than someone at the bottom of the escalator. It wouldn't be noticeable to us, but the effect would take place.

[@shaquadradeloiserussell8659]

No it wouldn't. Just because its 12 a.m. in central time zone in America, and its 12 p.m. in Indonesia, does not literally mean Indonesia is 12 hours into the future. 12 a.m. here is exactly the same time as 12 p.m. there. If you don't believe it try doing a video call with somebody in Indonesia. Light years cover distances not time. Which is weird, because Carl Sagan himself said that on the first episode. So this time travelling crap is a complete contradiction.

[@RobCLynch]

@@shaquadradeloiserussell8659 Hmmm the documentary I saw was talking about distance from above the Earth and that the higher we get, the slower time passed. It had nothing to do with alternate time zones.

[@shaquadradeloiserussell8659]

@@RobCLynch If you are somewhere in space other than here, then you are in another time zone; DEPENDING how you're looking at it. Two separate places will have their own time, and yet the two places are both on the same frame of time as far as the galaxy or universe sees it. That's why there is a popular phrase in Physics: "Time is relative'. It does not have one , nor two, definitions. People confuse speed with time, the same way they confuse light with the source that provides the light. Is a light bulb the light , or is it that stuff that's shining on the walls and floor?

[@shaquadradeloiserussell8659]

@@RobCLynch Also... the theory about "Time slowing down" the further one travels in space, merely because they saw a watch slowing down, could most likely not be because time is literally slowing down, but the immense speed and pressure is causing the watch to malfunction; The same as it affects your heart and other organs. That's another thing think about if planning a deep deep space travel: CAN this vessel actually make it that far without succumbing to damage?

[@rudybaldovino9528]

Very fascinating, thanks!

[@Xeno426]

If you were to travel at exactly light speed, time actually *would* stop for you. Getting to the speed of light, however, would require more energy than exists in the universe.

[@shaquadradeloiserussell8659]

The only problem with this theory is its not true. If it WERE 100% possible to fly a spacecraft that is fast enough to get you from here to the farthest known galaxy, and back to Earth again in 1 minute flat, People will not be but a minute older than they were before you left.

[@JoeRussellProductions]

If I was that brother, I probably would have left the bench. When my brother is like 5 minutes late, I leave him behind!

[@domosrage5434]

The while thing about time dilation, how do we know we age slower rather than just perceive time slower? Could it be that we start aging before our very eyes if we were in front of a mirror, rather than staying young despite our surroundings progressing through time?

[@deserteagle4151]

We are traveling at speed. Sitting here I am moving at the speed of the earth's rotation. And the speed of the earth's orbit around the sun. And the speed of the solar system around the galaxy center. And the speed of the expanding universe. Speed is relative to the observer. Where's the observer?

[@calx]

Good job on missing the point of this video haha. As you travel near the speed of light, time slows down. For you. Everywhere else in the universe time continues on as normal. So a trip that takes 5 minutes in your rocket, would take 50 years in your F1 car.

[@Audiotwist]

Image watching this on tryptamines...

[@rammbostein]

yea maybe, but only if the planet is still alive while ur gone, consider war, natural disasters, etc. oh and if you re thinking of radio communication forget it, lol cuz the waves wont come back in time lol

[@Galentw]

Why does the time go much faster because you travel the speed of light? Then the time should go slower for the people around you, and in their point of view it should look like you're moving really slow

[@alarik95]

if he was gone for decades... What about the fuel in the bike? Oh I get it... the bike has nothing to do with it... it's just today's means of travel.

[@dmatthews7423]

Do you get tunnel vision because the light you would ordinarily see reflected off of the objects outside of the tunnel doesn't have time to reach you?

[@PhilthAdelphiA]

@tige55 in other words, yes, that shit will fuck you up badly.

[@PhilthAdelphiA]

@Mark2790 awwww shit. im theist and i found that pretty funny.

[@Blockistium]

I'm confused. If you slow down travelling near the speed of light... Isn't that saying you slow down as you speed up? Whaaaat? ._.

[@Johnnytotal]

That’s why you don’t travell at the speed of light. You made your own brother in to an old man . .

[@ItsameAlex]

@question279 only the ones in america. Even most creationists in my country think the earth is like 5 billion years old.

[@Blockistium]

@btkw But wouldn't that make light travel slower than it actually does? Wait. Does this only apply to matter? Still. Hrm.

[@Ilikemustard]

You'd need to be going about 108 million k/h before there was any notable difference... I don't think Porsches go that fast

[@GreatImperium]

@uploader109 Paolo: I'm in a hurry, gotta go now Vinchenzo: ok, just don't travel near the speed of light Paolo: O_O

[@chegeny]

Sono Paolo. Questa è Vinci, Italia. Carl mi ha mentito. Non sapevo che i miei amici e la mia famiglia sarebbero morti di vecchiaia.

[@JoeRussellProductions]

Think of how incredible the world would be if this kind of stuff replaced religion.

[@Ashitaka255]

Ironically, he might've tried a little too hard to simplify his point, all the Italian names didn't help either.

[@youtubertonyoutubert1614]

Going at the speed of light doesn't effect time it effects atomic decay. as time is relative to being compared to all other atomic decay in existence time dilation isn't real you just change the rate of atomic decay for a chunk of mater.you'd have aged the same. your watch might read less time had passed but only because of its sub atomic mechanics. one moment experienced by you would still be one moment experienced by me. If this method would extend your life or not is moot. not time travel