What is the proof of for example. I travel at the speed of light, and coming back from only a few minutes to find everyone i know has aged or gone? How do we know it's actually possible? It's mind boggling to say the least to say time stops for you, and a few minutes is actually decades. I want proof god damnit.
@matt876mma You cant travel at the speed of light, but near enough to it , time takes longer to tick at a faster speed, time in space is actually quicker than down here because the mass of the earth stretches and distorts space time. A moving clock takes longer to tick literally than a stationary one because atoms live longer at high speeds so there for it stretches time. A stationary atom decays alot faster than a moving one . Ive probably repeated myself, its proven you can look it up .
@matt876mma There's an equation to calculate the time diferences: t=t0/sqrt(1-(v/c)^2) Being t0 the time measured by the observer moving at speed "v". Of course the visible effects only happen for speeds close to the speed of light (c). For example at 0.5c (half the speed of light) 1 minute for the moving observer is 1.15 minutes for the stopped person.
We need more people like Sagan and less dirtbag politicians and middle eastern dictators. In 1000 years we will either by far more advanced then we could ever dream, or we will be consigned to dwell on our weaknesses rather then our strengths.
This sort of rules out space travel since we would need to go near the speed of light and since you would come back decades later, you might leave and come back to see the destruction of earth.
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.
what it actually is going?? Because in a way you actually arnt travelling any faster, just say you find out someone close to you is dieing and you obviously wan to reach them in the quickest way possible, so lets say you use light speed yes to you, you arrive extreemely quick but to the observer you are delayed and might even miss there passing?? This stuff interests me but is confusing, someone care to explain?
@gogogogoguck Time dilation just slows down the passage of time for someone traveling at close to the speed of light. Time still moves at the same rate for everyone else. If I'm at the Sun, and I have to get back to Earth really fast, I could fly at nearly the speed of light and get there in eight or nine minutes according to everyone else; to me, it would seem to take far less.
to a person who is observing a ship approaching the speed of light would the ship seem as though it is slowing down as it is getting closer to light speed because time is slowing down to the ship so the observer would see this as well? Another way to put it is there is a track the ship and the people on it are travelling around this track at light speed to them the journey only takes 4 mins from point A to B but to the oberservers it takes hours so to the observers would the ships slower than..
@btkw They do have mass. They don't have mass when stationary, which means you can't stop photons, they will either be absorbed completely or reflected completely. An example would be black holes, which suck in light, solely because they have mass. We also can observe stars that are hidden behind other stars because the light gets slightly bent by the star's mass and manages to pass around the star that would block our view.
@BlockisticStudios Lets say you have two persons in a room for 1 hour.One having fun with his friends, and other being extremely bored and having nothing to do.. even though they will spend same time in room,to one person time will appear as if going really fast, to other quite the opposite. When your brain is going "faster" and having fun, your perception of time changes and what appears as few minutes to you, to someone it feels as few hours
@Germanboy567 Chill. Even CERN aren't 100% sure, that's why they released the data and asked the scientific community to confirm it. Every single verifiable test has been within margin of errors.
@BranZyme no, no it isn't. it isn't possible for any of us to completely understand or even come close to what the CERN guys are thinking. the whole idea that the neutrino went faster than light is an explanation for the data they gathered.
@BranZyme Actually, there's been significant and substantial evidence for that not being true. I encourage you to look up the criticisms and papers published arguing for the results not holding weight to the conclusion.
GPS sattelies is a good example of a modern day appliance that HAS to take time dilation into account. Time does not tick at the same rate for us and the satellites, they are in weaker gravity and they move faster thus time dilation is in effect. Satellites internal clocks need to be resynced constantly or the positions would be FAR OFF since your position is calculated from the time it takes the signal to reach the sattelites, if the clock is wrong the time would be wrong and so would your pos.
@intoxicatednix make no mistake that special relativity is an observed phenomenon (which makes Einstein even more amazing, given that his thought experiments in the early 20th century have all been conclusively proven to be correct). The fact that this is a thought experiment doesn't mean much - Sagan's deriving, from empirically observed facts and scientific laws accounting for these facts, certain truths about what would indeed happen if someone were to travel at close to the speech of light.
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.
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.
This comment has received too many negative votesshow
The way he talks is so annoying: perspective of space and time straaaaaaaaaaangly chaaanged. life reflected of your nose reaches me juuuuust an instant of time before your ears. But suppoooooooooose I had a magic camera sooo I could see your nooooooose and your eaaars precise at the same instant" SO ANNOYING !!!!!!!!!!!!!!!!!!!
@ubercoolist What? What joke? What am I supposed to take? That statement is only valid when the joke is at my expense. Which it is not. Be more creative or die in fire. People are sick and tired of these pathetic, overused, pointless "jokes." My the fury of a thousand flames take you.
@Roflcopter4b i made a joke now leve me alone i really dont care what you say to me because you are just some random creeper that picks on kids and trys to rape them
@ubercoolist I love it when people literally can think of no way to defend themselves and resort to cheap insults. Keep it up. You only bury yourself further.
@ubercoolist I'm completely in control. You're the one making lousy, overused, pathetic jokes. Lesson is, an please do learn it, THINK BEFORE YOU SLAP SOME COMMENT ON A VIDEO. Will someone actually want to read this?
How could anyone consciously dislike this video? This video explains a fairly complex idea so simply that anyone can understand it. Carl Sagan was one of the greatest human beings to ever exist. I would gladly give up the entire cast of Jersey Shore for just one more Carl.
@CElkins0011 Jersey Shore? I would give up every reality show that exists, and basically ever show that is on television if Carl comes to existence again.
@BallerzTV haha agreed. Obviously there is an infinite number of idiots I would gladly trade for another Carl but that was the first group of idiots I could think of haha
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.
so...ultimately you go the same distance in the same amount of time...or a far greater amount of time? you perceive it as traveling ultra-fast, but everyone else perceives it at regular speed? theres either something fundamentally wrong or carls just too damn smart for me.
I wondered if ET existed in the andromeda galaxy and we sent a vessle of some sort near the speed of light to them and back it would still take centuries before we know of its findings. If it was maned then they would have come back to the future and may find flying Deloreans! Sick!
So a photon is a light "particle" (I know, I know), and it travels at the speed of light. So it experiences 0% of the time that the rest of the world experiences.
The photon's journey, to the photon, seems instantaneous. If this photon is emitted by a light bulb, its travel from the filament to your eye - to the photon - is instantaneous. This means that to the photon, time does not exist, and all of its positions occur simultaneously.
So insecure are people about their own views they have to criticize an alternate point of thinking when that's not even the subject of the video? Goddamn, you Atheists and Theists are just buttfuck stupid.
@Lakerbballfan Maybe :) According to Einsteins theories, a bug traveling at the speed of light (which it can't be done) would have 0 mass. So it's all good. This is being revised by the String theory, so maybe Einstein was wrong. At any rate, getting hit with bugs SUCKS! Even 0 mass bugs. At least for the bug it does :) haha
@ghpink Yeah, and a bug traveling at the speed of light would flatten out and disintegrate well before it hit us! Our own bodies at 4Gs I think, would endure being crushed. The bug? At 40mph it splats on a windshield. So much for the speed of light! lol
I watched this on Cosmos the other day, and completely blew my mind. Why the F*CK isn't the world funding research of this?! TIME TRAVEL IS TECHNICALLY POSSIBLE FOR F*CKS SAKE. Ok bye. :] Ps. F*ck.
In short, light is always traveling the same speed, then again we define space and time by light so light is always going straight too, it's the universe that curves and slows down.
Sidenote for anyone interested
With the LHC now its cool, H+ going ~the speed of light, get added energy, so they, instead of going faster, expand in size.
@lazer46 Time travels slower for you if you're travelling near the speed of light. What seems like 10 minutes at 200,000 Km/s might be 10 years for those standing still. I know, it's extremely odd, but that's why it's so interesting! :D
@onlynameithoughtof That is a really confusing paradox: instead of traveling fast to save time, one would have to give many years to light speed to be able to travel in a destination that would feel like a short time.
tige55, even if it took a decade to accelerate to the speed of light, you would still have to accelerate by 30,000 km/s every year. That's about 82 km/s acceleration increase every day. Which is equal to 295,200 km/h every day.
@stuckvanilla I was meaning over like hundreds of years haha. By the time we have developed systems to even try to reach light speed we would have to create some crazy dampening fields to counter the inertia that would destroy you, is what I am saying. Like a time dilution field or a inertial dampening field.
@Galentw that's what I still cannot understand. Traveling at the speed of light to an observer would actually be considered a very slow way to travel if time for them goes by faster than for those traveling at near light speed.
I doubt that we will ever use light speeds to travel around the universe,Who would volunteer for a journey knowing that when you return,All your friends and relatives would be dead.
@Galentw If you look at it like this, if your travling in a car, and your driving east, the faster you go, the shorter the time it takes for you to get there, and if you go faster then the speed of light, or at the speed of light, it takes you MUCH less time for YOU to get there, however, the world has gone slower then you
Even if you went with 10 times the speed of light, you will still not get there in time. Some places are millions of light if not billions of light years away.
@TehAl3X I would not get into time dilation thingy at this time.
I used to think that what a waste of beautiful and huge universe. Then I notice something almost unbelievable and impossible. Did you know that trillions of tons of material is being transported throughout the galaxy but we cannot see how but we can only see it once it get there? In other words, you cannot see or detect the matter the whole time it is in transit but you can see it once it appears at the destination.
@TehAl3X I had to use a little logic that if millions of tons/sec of material shows up at point B than it must have originated somewhere far at point A. You just cannot detect it while it is in transit only when it gets to the destination. This tells me that there is another way of transport through space we are just not aware of where distance between point A and point B means little. The only thing I am not sure of is that whether there is a short distance involved or is it instantaneous.
@HappyGamerMan , Sagan is presupposing a universe in which the speed of light is about 40 mph, for the sake of giving viewers an example that's easy to think about.
@HappyGamerMan Sagan is presupposing a universe in which the speed of light is about 40 mph, for the sake of giving viewers an example that's easy to think about.
@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..
@tomdugan123 It's not the speed that's the problem, it's the acceleration (how quickly you are _changing_ speed). Once the plane is in level flight, you're going a few hundred miles an hour, but you can move with no problem- you're not accelerating. SImilarly, going near light speed wouldn't prove fatal as long as you get up to speed gradually.
Its because of gravity that you will get killed from acceleration. If you accelerate in zero gravity, you will not feel and G-force acting upon you. Hence, traveling at speed of light will not kill you. Mind you everything has a gravity, anything with mass has gravity, it just depends on how much mass (gravity) that object has to influence the force that acts upon you when you accelerate.
@RotaryKnight zakalwe30 is right. Mass does approach infinity. So my rest mass is 80kg but if I travel very fast it increases. Photons have a rest mass of 0, so when they travel at the speed of light, this is multiplied by a factor of infinity. So that is why photons have a finite mass.
@RotaryKnight Wrong. Newtonian physics state that an object in motion will stay in motion, and an object at rest will stay at rest unless acted upon by an outside force. If you were to suddenly accelerate to the speed of light, you would disintegrate because of this law. Your body does not want to go that fast. The acceleration of 0 to 183000 miles per second would tear you to shreds. The Force would be infinity. F = ma. If a is infinite, then you have infinite force on you.
@plzplz12232 What if the acceleration to light speed took years? If you increased your speed so minutely that you barely felt the acceleration? would you still be ripped to shreds? haha
so going 99.9% the speed of light slows time down significantly for you, yet your still moving about the universe at 99.9% the speed of light, would this mean that instead of witnessing 300000km go by every second you would see the universe passing many times faster? effectively from your perception going "warp speed"?
Speed of light is a known law, but it is modified by the fact the each part of the Universe--to the smallest parts--has its own time effect. Relativity really is profound, that a beam-of-light, from your flashlight, on a train traveling
i want that freakin warp drive moped
Enticer666 2 weeks ago
Its 2001: A Space Odyssey all over again
Huddiethegreat 3 weeks ago
What is the proof of for example. I travel at the speed of light, and coming back from only a few minutes to find everyone i know has aged or gone? How do we know it's actually possible? It's mind boggling to say the least to say time stops for you, and a few minutes is actually decades. I want proof god damnit.
matt876mma 4 weeks ago
@matt876mma You cant travel at the speed of light, but near enough to it , time takes longer to tick at a faster speed, time in space is actually quicker than down here because the mass of the earth stretches and distorts space time. A moving clock takes longer to tick literally than a stationary one because atoms live longer at high speeds so there for it stretches time. A stationary atom decays alot faster than a moving one . Ive probably repeated myself, its proven you can look it up .
dawtchins 2 weeks ago
Comment removed
youdontknowxpand 1 week ago
@youdontknowxpand we know it's possible. It happens on airplanes and on GPS satellites. Just search for time relativity on GPS...
youdontknowxpand 1 week ago
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@matt876mma There's an equation to calculate the time diferences: t=t0/sqrt(1-(v/c)^2) Being t0 the time measured by the observer moving at speed "v". Of course the visible effects only happen for speeds close to the speed of light (c). For example at 0.5c (half the speed of light) 1 minute for the moving observer is 1.15 minutes for the stopped person.
youdontknowxpand 1 week ago
So Neutrinos (supposedly) travel back in time? :0
itubeyoudont 1 month ago
@itubeyoudont we dont know for certainty whats happened yet i think
dawtchins 2 weeks ago
carl sagans voice sounds vaguely simmilar to kermit the frogs
jmarshmellowman 1 month ago 3
Crazy Italian scooters
LockemShoto 1 month ago
Fuck, I want one of those scooters.
cjs2964 1 month ago
soo trippy when stoned
jorn1233 2 months ago 2
We need more people like Sagan and less dirtbag politicians and middle eastern dictators. In 1000 years we will either by far more advanced then we could ever dream, or we will be consigned to dwell on our weaknesses rather then our strengths.
Magmatwister 2 months ago 5
last week the usa built a bomb that travels 5 times the speed of sound...
punkrocker6431 2 months ago
What a good little brother
markhernandz 2 months ago
This sort of rules out space travel since we would need to go near the speed of light and since you would come back decades later, you might leave and come back to see the destruction of earth.
TheBaldchipmunk 3 months ago
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.
Cerulean0987 3 months ago 5
what it actually is going?? Because in a way you actually arnt travelling any faster, just say you find out someone close to you is dieing and you obviously wan to reach them in the quickest way possible, so lets say you use light speed yes to you, you arrive extreemely quick but to the observer you are delayed and might even miss there passing?? This stuff interests me but is confusing, someone care to explain?
gogogogoguck 3 months ago
@gogogogoguck Time dilation just slows down the passage of time for someone traveling at close to the speed of light. Time still moves at the same rate for everyone else. If I'm at the Sun, and I have to get back to Earth really fast, I could fly at nearly the speed of light and get there in eight or nine minutes according to everyone else; to me, it would seem to take far less.
jaimehlers 3 months ago
to a person who is observing a ship approaching the speed of light would the ship seem as though it is slowing down as it is getting closer to light speed because time is slowing down to the ship so the observer would see this as well? Another way to put it is there is a track the ship and the people on it are travelling around this track at light speed to them the journey only takes 4 mins from point A to B but to the oberservers it takes hours so to the observers would the ships slower than..
gogogogoguck 3 months ago
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? ._.
BlockisticStudios 3 months ago
@BlockisticStudios It meant that you experience time at a slower rate than an observer as you travel closer to the speed of light.
btkw 3 months ago
@btkw
But wouldn't that make light travel slower than it actually does? Wait. Does this only apply to matter? Still. Hrm.
BlockisticStudios 3 months ago
@BlockisticStudios I'm no expert but i do know that light particles are massless, maybe that has something to do with it.
btkw 3 months ago
@btkw They do have mass. They don't have mass when stationary, which means you can't stop photons, they will either be absorbed completely or reflected completely. An example would be black holes, which suck in light, solely because they have mass. We also can observe stars that are hidden behind other stars because the light gets slightly bent by the star's mass and manages to pass around the star that would block our view.
paddymoep 3 months ago
@BlockisticStudios Lets say you have two persons in a room for 1 hour.One having fun with his friends, and other being extremely bored and having nothing to do.. even though they will spend same time in room,to one person time will appear as if going really fast, to other quite the opposite. When your brain is going "faster" and having fun, your perception of time changes and what appears as few minutes to you, to someone it feels as few hours
velidagovic 3 months ago
@velidagovic
But with the speed of light, isn't time for you actually slower? Like, time affects your chemical makeup more slowly or... Sigh.
BlockisticStudios 3 months ago
red light shift
cygnusx555 3 months ago
Image watching this on tryptamines...
Audiotwist 4 months ago
neutrinos. that is all.
BranZyme 4 months ago 24
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@BranZyme it has not been proven yet...
VanMedia 3 months ago
@BranZyme Hasn't been proven yet.
Jonmad17 1 month ago
@Jonmad17
Fuck off and stop living in denial. They did the test months before they released the data about it.
Germanboy567 1 month ago
@Germanboy567 Chill. Even CERN aren't 100% sure, that's why they released the data and asked the scientific community to confirm it. Every single verifiable test has been within margin of errors.
Jonmad17 1 month ago
@BranZyme no, no it isn't. it isn't possible for any of us to completely understand or even come close to what the CERN guys are thinking. the whole idea that the neutrino went faster than light is an explanation for the data they gathered.
chuckles1252 2 weeks ago
@BranZyme Actually, there's been significant and substantial evidence for that not being true. I encourage you to look up the criticisms and papers published arguing for the results not holding weight to the conclusion.
BlobTheIncredible 1 week ago
@BranZyme not proven
Indrius 1 week ago
GPS sattelies is a good example of a modern day appliance that HAS to take time dilation into account. Time does not tick at the same rate for us and the satellites, they are in weaker gravity and they move faster thus time dilation is in effect. Satellites internal clocks need to be resynced constantly or the positions would be FAR OFF since your position is calculated from the time it takes the signal to reach the sattelites, if the clock is wrong the time would be wrong and so would your pos.
softan 4 months ago
I'm too high for this.
JacobMichaelC 4 months ago
this just blew my mind lol
AnFmusic010 4 months ago
I want that bike
sl3dge78 4 months ago
Is anyone else a little sad at what happened to Paulo and Vincenzo?
Irishflyboy255 4 months ago in playlist More videos from CarlSaganPortal 4
Shrooms - not even once.
Andokool12 5 months ago
this kid is trippin balls, just sayin
BENwins22 5 months ago 24
Is this why in Tron everything was blue and red?
Lorbera 5 months ago
Manly tears were shed.
arthurude1 5 months ago
This scene is one of the most incredible moments I've ever seen, ever, in a TV show.
goundermytongue 5 months ago 3
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JEFESHKA 5 months ago
Stupid. "THIS IS A THOUGHT EXPERIMENT" Get that through your heads.
intoxicatednix 5 months ago
@intoxicatednix make no mistake that special relativity is an observed phenomenon (which makes Einstein even more amazing, given that his thought experiments in the early 20th century have all been conclusively proven to be correct). The fact that this is a thought experiment doesn't mean much - Sagan's deriving, from empirically observed facts and scientific laws accounting for these facts, certain truths about what would indeed happen if someone were to travel at close to the speech of light.
ken6346 5 months ago
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.
alarik95 5 months ago
Time paradox
maxomills2nd 6 months ago
lmao. Why would somebody wait that long for a brother riding on a scooter?
kidkong584 6 months ago
Everyone should watch this stoned at least once.
Guttermouth 6 months ago
@Guttermouth I had the same thought before reading the comments. lol
kidkong584 6 months ago
What a legend Carl Sagan is... World needs more like him!
dansharkhunter 6 months ago
imagin him smashing into a wall at the speed of light....BACK TO DA FUTA
TheBuckyHD 6 months ago
He experiences something even stranger... His brother accidentally gave him a glass of water with LSD.
Heithlar 6 months ago
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.
Nerdfighter21 6 months ago
@Oveld
Please leave your zealot ranting off a scientific post please. You're as welcome as a mosquito.
robofthewest 6 months ago
@Boywithouthat44 -- How old are you? 12?
robofthewest 6 months ago
if we can't even see through the lies of men, what chance will we stand against the Father of lies?
oveid 7 months ago
I have never heard the Speed of Light explained in such a depressing way.
Bosco239 7 months ago
This comment has received too many negative votes show
The way he talks is so annoying: perspective of space and time straaaaaaaaaaangly chaaanged. life reflected of your nose reaches me juuuuust an instant of time before your ears. But suppoooooooooose I had a magic camera sooo I could see your nooooooose and your eaaars precise at the same instant" SO ANNOYING !!!!!!!!!!!!!!!!!!!
manwithouthat44 8 months ago
@manwithouthat44 man i love his voice
BuddhaMUD 8 months ago
@manwithouthat44 dude whats wrong with you not everyone has a extremely high pitched voice like justin bieber
darkmaster24i1 7 months ago
@darkmaster24i1 its more how he empathizes everything. nothing against the man
manwithouthat44 7 months ago
look atwhat roflcopter is saying to me hes a n ass
ubercoolist 8 months ago
1 person went to the speed of light and got stuck in a paradox
ubercoolist 8 months ago
@ubercoolist You're not funny. These jokes are not funny. I hate you.
Roflcopter4b 8 months ago
@Roflcopter4b wtf i guess you cant take a joke
ubercoolist 8 months ago
@ubercoolist What? What joke? What am I supposed to take? That statement is only valid when the joke is at my expense. Which it is not. Be more creative or die in fire. People are sick and tired of these pathetic, overused, pointless "jokes." My the fury of a thousand flames take you.
Roflcopter4b 8 months ago
@Roflcopter4b dude chill you freaking creep
ubercoolist 8 months ago
@ubercoolist I suppose. Death is indeed too good for you. Your life will be long,pointless, and painful.
Roflcopter4b 8 months ago
@Roflcopter4b i made a joke now leve me alone i really dont care what you say to me because you are just some random creeper that picks on kids and trys to rape them
ubercoolist 8 months ago
@ubercoolist I love it when people literally can think of no way to defend themselves and resort to cheap insults. Keep it up. You only bury yourself further.
Roflcopter4b 8 months ago
@Roflcopter4b its a joke other people made jokes on this video to chill the fuck down and come back when you get some damn self control
ubercoolist 8 months ago
@ubercoolist I'm completely in control. You're the one making lousy, overused, pathetic jokes. Lesson is, an please do learn it, THINK BEFORE YOU SLAP SOME COMMENT ON A VIDEO. Will someone actually want to read this?
Roflcopter4b 8 months ago
@Roflcopter4b thts the thing i do know it so i wanted to make a joke because i already know it and im sorry if i offended you but im done fighting
ubercoolist 8 months ago
How could anyone consciously dislike this video? This video explains a fairly complex idea so simply that anyone can understand it. Carl Sagan was one of the greatest human beings to ever exist. I would gladly give up the entire cast of Jersey Shore for just one more Carl.
CElkins0011 8 months ago
@CElkins0011 Jersey Shore? I would give up every reality show that exists, and basically ever show that is on television if Carl comes to existence again.
BallerzTV 8 months ago
@BallerzTV haha agreed. Obviously there is an infinite number of idiots I would gladly trade for another Carl but that was the first group of idiots I could think of haha
CElkins0011 8 months ago
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.
WrestlingHeretic 8 months ago
I just learned an entire chapter of my physics textbook with this video.
XM8rifle 8 months ago
"grown up, moved on, and died..." HAHA!
horbergaren 8 months ago 65
@horbergaren
i lol'd
hurmpfff 8 months ago
If hell is where Cal Sagan is, that's where I want go
noelxcore1337 9 months ago
If hell is where Cal Sagan is, that's where I want go
noelxcore1337 9 months ago
gracias por subir el video
Saludos.
bloodshedsrock 9 months ago
so...ultimately you go the same distance in the same amount of time...or a far greater amount of time? you perceive it as traveling ultra-fast, but everyone else perceives it at regular speed? theres either something fundamentally wrong or carls just too damn smart for me.
seanmm318 9 months ago
/watch?v=S4hjoT7ttnY
RicheyWHUFC 9 months ago
smoke weed every day
Danguhrous 10 months ago
Haha this is so trippy
SuperHaloStarwarsFan 10 months ago
Mind=blown.
smokintheblaze 10 months ago
I wondered if ET existed in the andromeda galaxy and we sent a vessle of some sort near the speed of light to them and back it would still take centuries before we know of its findings. If it was maned then they would have come back to the future and may find flying Deloreans! Sick!
TeQuiiLaSHoTZz 10 months ago
So a photon is a light "particle" (I know, I know), and it travels at the speed of light. So it experiences 0% of the time that the rest of the world experiences.
The photon's journey, to the photon, seems instantaneous. If this photon is emitted by a light bulb, its travel from the filament to your eye - to the photon - is instantaneous. This means that to the photon, time does not exist, and all of its positions occur simultaneously.
sobeita 11 months ago
@sobeita Okay, 10thdim.
UltimaXG2 11 months ago
The end had me choking up
CheesyBerger 11 months ago
So insecure are people about their own views they have to criticize an alternate point of thinking when that's not even the subject of the video? Goddamn, you Atheists and Theists are just buttfuck stupid.
KrypticAsylum 11 months ago
OK, but I don't believe the view would retreat and dilate so symmetrically. X-D
marasu66 11 months ago
Mind equals fucked.
Mad1093 1 year ago
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God created all possibilities, and gave you the free will to think.
Johnnyblazedanketch 1 year ago
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God created all possibility.
Johnnyblazedanketch 1 year ago
makes sense, when i close my eyes in the car for about 5 minutes and open them everything seems bluer
bored2deathish 1 year ago
Jesus. I'll take some of whatever he's smoking.
n00buler89 1 year ago
Paolo be trippin serious balls
westfieldwx 1 year ago 2
"Your NOSE is just a little closer to me than your ears."
NowhereMan8521 1 year ago
Having a bug hit you, when you're traveling at the speed of light..... WOULD SUCK! :)
ghpink 1 year ago 2
@ghpink Having a bug hit you at the speed of light might go right through you! It's gotta go somewhere.
Lakerbballfan 8 months ago
@Lakerbballfan Maybe :) According to Einsteins theories, a bug traveling at the speed of light (which it can't be done) would have 0 mass. So it's all good. This is being revised by the String theory, so maybe Einstein was wrong. At any rate, getting hit with bugs SUCKS! Even 0 mass bugs. At least for the bug it does :) haha
ghpink 8 months ago
@ghpink Yeah, and a bug traveling at the speed of light would flatten out and disintegrate well before it hit us! Our own bodies at 4Gs I think, would endure being crushed. The bug? At 40mph it splats on a windshield. So much for the speed of light! lol
Lakerbballfan 8 months ago
@ghpink Technically it's the other way around- things with zero mass travel at the speed of light. ;)
WNxFish 8 months ago
Can still remember watching this as a kid and being blown away
RevStaplehurst 1 year ago
Italians sure know how to make a bike
talking1717 1 year ago 117
@talking1717 It's a scooter.
Gokulsan 10 months ago
jeez this is awsome after a smoke lol...just needs a pink floyd soundtrack behind it.
DandyDubber 1 year ago
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DandyDubber 1 year ago
I watched this on Cosmos the other day, and completely blew my mind. Why the F*CK isn't the world funding research of this?! TIME TRAVEL IS TECHNICALLY POSSIBLE FOR F*CKS SAKE. Ok bye. :] Ps. F*ck.
BedroomBassist 1 year ago
@BedroomBassist Nope. Causality. You can only move forward.
UltimaXG2 11 months ago
@UltimaXG2 Oh yeah I realise that.. but it's still pretty amazing!
BedroomBassist 11 months ago
@BedroomBassist Yep. And, conveniently, it makes fast-traveling across the galaxy completely and utterly impractical.
UltimaXG2 11 months ago
In short, light is always traveling the same speed, then again we define space and time by light so light is always going straight too, it's the universe that curves and slows down.
Sidenote for anyone interested
With the LHC now its cool, H+ going ~the speed of light, get added energy, so they, instead of going faster, expand in size.
EvilHeadBoy 1 year ago
I don't understand how they can age differently.. like why can't they be growing at the same time.. Fucks my mind up
lazer46 1 year ago
@lazer46 Time travels slower for you if you're travelling near the speed of light. What seems like 10 minutes at 200,000 Km/s might be 10 years for those standing still. I know, it's extremely odd, but that's why it's so interesting! :D
onlynameithoughtof 1 year ago 2
@onlynameithoughtof That is a really confusing paradox: instead of traveling fast to save time, one would have to give many years to light speed to be able to travel in a destination that would feel like a short time.
uploader109 1 year ago
@uploader109
Paolo: I'm in a hurry, gotta go now
Vinchenzo: ok, just don't travel near the speed of light
Paolo: O_O
GreatImperium 1 year ago 2
tige55, even if it took a decade to accelerate to the speed of light, you would still have to accelerate by 30,000 km/s every year. That's about 82 km/s acceleration increase every day. Which is equal to 295,200 km/h every day.
stuckvanilla 1 year ago
@stuckvanilla I was meaning over like hundreds of years haha. By the time we have developed systems to even try to reach light speed we would have to create some crazy dampening fields to counter the inertia that would destroy you, is what I am saying. Like a time dilution field or a inertial dampening field.
tige55 1 year ago
The Italians sure make some sick mopeds
FlakMeister 1 year ago
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that kid is trippin on acid.
eazyduzitjacob 1 year ago
that kid is trippin on acid.
eazyduzitjacob 1 year ago
for decades people saw the coloured object that would pass by in an instant. until finally it stopped, at which point a boy named poalo appeared.
nandob777 1 year ago
god dammit
charabowskii 1 year ago
Vincenzo: Is it my turn yet, Paulo?
MrBillyconcarne 1 year ago
to alot this must have been a mind fuck
jeremy123422 1 year ago
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
Galentw 1 year ago
@Galentw that's what I still cannot understand. Traveling at the speed of light to an observer would actually be considered a very slow way to travel if time for them goes by faster than for those traveling at near light speed.
zcxvasdfqwer1234 1 year ago
this is the saddest story ever
icen1ne 1 year ago
I doubt that we will ever use light speeds to travel around the universe,Who would volunteer for a journey knowing that when you return,All your friends and relatives would be dead.
arobekie 1 year ago
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@arobekie I would do it. I am sure many others would too.
DallasH717 1 year ago
@arobekie its the only way to travel farther than we can now
himpllx 1 year ago
whoa i didn't get it
WHY DID TIME PASS FASTER?.....
Galentw 1 year ago
@Galentw time itself didn't pass faster, the kid on the moped was moving so fast, time 'dilated' in/around him
AtaraxiaMedia 1 year ago
@Galentw If you look at it like this, if your travling in a car, and your driving east, the faster you go, the shorter the time it takes for you to get there, and if you go faster then the speed of light, or at the speed of light, it takes you MUCH less time for YOU to get there, however, the world has gone slower then you
TheBeeFart 1 year ago
So... Traveling at the speed of light is actually in the normal (world as we know it now) world a slower method of travel?...
ACmetalfaceDC 1 year ago
Even if you went with 10 times the speed of light, you will still not get there in time. Some places are millions of light if not billions of light years away.
__ You want to get there? You talk to me! __
:)
MeX2004 1 year ago
@MeX2004 Yeah but if you went 10 times the speed of light, your concept of time would change radically.
TehAl3X 1 year ago
@TehAl3X I would not get into time dilation thingy at this time.
I used to think that what a waste of beautiful and huge universe. Then I notice something almost unbelievable and impossible. Did you know that trillions of tons of material is being transported throughout the galaxy but we cannot see how but we can only see it once it get there? In other words, you cannot see or detect the matter the whole time it is in transit but you can see it once it appears at the destination.
MeX2004 1 year ago
@TehAl3X I had to use a little logic that if millions of tons/sec of material shows up at point B than it must have originated somewhere far at point A. You just cannot detect it while it is in transit only when it gets to the destination. This tells me that there is another way of transport through space we are just not aware of where distance between point A and point B means little. The only thing I am not sure of is that whether there is a short distance involved or is it instantaneous.
MeX2004 1 year ago
The waiter starts cracking up @ 4:19 . hes like wtf are u saying?
soyuski 1 year ago
Speed of light is very friggin fast
TheTravisChannel 1 year ago
perfect explanation
muranyiii 1 year ago
Why we do not care about the factor of speed and time when we calculate the distance between the Earth and the Sun.
apspacking 1 year ago
would it be hard to drive a moped at the spedd of light
HappyGamerMan 1 year ago
@HappyGamerMan Not if you tune it up enough, my friend done it a couple of years ago... havn't seen him since
cabbage0dusk 1 year ago 6
@HappyGamerMan , Sagan is presupposing a universe in which the speed of light is about 40 mph, for the sake of giving viewers an example that's easy to think about.
theseaotter 1 year ago
@HappyGamerMan Sagan is presupposing a universe in which the speed of light is about 40 mph, for the sake of giving viewers an example that's easy to think about.
theseaotter 1 year ago 12
@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..
baxill23 9 months ago
@HappyGamerMan It would be hard to do anything at the
speed of light. If you've ever been on an airplane then you
about the "G force" feeling you get when taking off. In an
airplane : You are only traveling at a few hundred MPH.
If you were traveling at the speed of light : Then it would surely
kill you. At least that is what I am thinking.
tomdugan123 1 year ago
@tomdugan123 It's not the speed that's the problem, it's the acceleration (how quickly you are _changing_ speed). Once the plane is in level flight, you're going a few hundred miles an hour, but you can move with no problem- you're not accelerating. SImilarly, going near light speed wouldn't prove fatal as long as you get up to speed gradually.
kailefipne 1 year ago
@kailefipne @tomdugan123 Its partly right.
Its because of gravity that you will get killed from acceleration. If you accelerate in zero gravity, you will not feel and G-force acting upon you. Hence, traveling at speed of light will not kill you. Mind you everything has a gravity, anything with mass has gravity, it just depends on how much mass (gravity) that object has to influence the force that acts upon you when you accelerate.
RotaryKnight 1 year ago
@RotaryKnight Yes, but doesn't relativity posit that as your speed approaches the speed of light, your mass approaches infinity?
zakalwe30 1 year ago
@zakalwe30 if that was true, light waves would be making holes in us.
RotaryKnight 1 year ago
@zakalwe30 I know what you mean though, Im am not experienced in these sort of things, I only have basic understanding of sorts.
people say mass is increased as you reach closer to speed of light, but from what I understand, people confuse mass with momentum, or energy
RotaryKnight 1 year ago
@RotaryKnight zakalwe30 is right. Mass does approach infinity. So my rest mass is 80kg but if I travel very fast it increases. Photons have a rest mass of 0, so when they travel at the speed of light, this is multiplied by a factor of infinity. So that is why photons have a finite mass.
javyi18 1 year ago
@RotaryKnight Wrong. Newtonian physics state that an object in motion will stay in motion, and an object at rest will stay at rest unless acted upon by an outside force. If you were to suddenly accelerate to the speed of light, you would disintegrate because of this law. Your body does not want to go that fast. The acceleration of 0 to 183000 miles per second would tear you to shreds. The Force would be infinity. F = ma. If a is infinite, then you have infinite force on you.
plzplz12232 1 year ago
@plzplz12232 What if the acceleration to light speed took years? If you increased your speed so minutely that you barely felt the acceleration? would you still be ripped to shreds? haha
tige55 1 year ago
@tige55 in other words, yes, that shit will fuck you up badly.
ANGELO13111 1 year ago
my jizz flys at the speed of light!
duhhh187 1 year ago
@duhhh187 "my jizz flys at the speed of light!" What? At least Hirosima bomb level event every time you jizz? Your life must be hard. :)
GeneralCalculus 1 year ago
I remember watching this while in my 8th grade science class. This explained things so much.
Zeno20 1 year ago
How do we know that at the speed of light images become "smaller"?
Valdris1987 1 year ago
I remember watching this when it first aired on tv - god I feel old! RIP Carl Sagan.
Apophisguard 1 year ago
so going 99.9% the speed of light slows time down significantly for you, yet your still moving about the universe at 99.9% the speed of light, would this mean that instead of witnessing 300000km go by every second you would see the universe passing many times faster? effectively from your perception going "warp speed"?
danthemanzizzle 1 year ago
Intelligent men are soooo sexy. I need one of those.
AAnneC 1 year ago
@AAnneC your on the wrong website to meet any of those!!
toasternac 1 year ago
Speed of light is a known law, but it is modified by the fact the each part of the Universe--to the smallest parts--has its own time effect. Relativity really is profound, that a beam-of-light, from your flashlight, on a train traveling