Einstein's twin paradox explained - Amber Stuver

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  • čas přidán 14. 05. 2024
  • Follow two astronauts into outer space to explore time dilation and Einstein’s theory of relativity through the Twin Paradox thought experiment.
    --
    On their 20th birthday, identical twin astronauts volunteer for an experiment. Terra will remain on Earth, while Stella will board a spaceship. Stella’s ship will travel to visit a star that is 10 light-years away, then return to Earth. As they prepare to part ways, the twins wonder what will happen when they’re reunited. Who will be older? Amber Stuver investigates the “Twin Paradox.”
    Lesson by Amber Stuver, directed by Aim Creative Studios.
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Komentáře • 8K

  • @Bavonc
    @Bavonc Před 4 lety +10264

    I feel like this is the level of confusion that babies experience when looking at adults having a conversation

  • @Rye-ug3wf
    @Rye-ug3wf Před 4 lety +17347

    Imagine telling someone you're twins, and them saying, "oh, who's older," and you being like, "Terra, by 11 years."

  • @sandippaul468
    @sandippaul468 Před 2 lety +3781

    Thank you. You saved my life. I had no means to cook food this morning but after watching this video I was able to cook my breakfast on the top of my head as this video set my brain on fire.

  • @fastica
    @fastica Před 2 lety +1526

    What I’ve learned: I’m as smart as a cat.

    • @mavi2643
      @mavi2643 Před 2 lety +29

      cats are smart

    • @sandippaul468
      @sandippaul468 Před 2 lety +31

      I would aim even lower.

    • @mirpalmeira
      @mirpalmeira Před 2 lety +3

      Something like this

    • @dhruvtripathi4154
      @dhruvtripathi4154 Před rokem +4

      Assuming that your cat is good at sarcasm 😁

    • @ismanhaji
      @ismanhaji Před 2 měsíci

      @@sandippaul468 (Thank you. You saved my life. I had no means to cook food this morning but after watching this video I was able to cook my breakfast on the top of my head as this video set my brain on fire ) this yours?

  • @dreamerdazegirl
    @dreamerdazegirl Před 3 lety +5841

    Imagine sending a message into space, waiting 2 years to only get a "👍" back

  • @RandomNulls
    @RandomNulls Před 3 lety +5202

    Imagine not having contact for a year only to receive a message saying “your fish died”

    • @zachbailey457
      @zachbailey457 Před 2 lety +143

      Four years actually. You need to pay attention.

    • @F1pidis
      @F1pidis Před 2 lety +178

      And you responding some 20 years later :" Oh no! I am coming back home right away "

    • @yardgrid
      @yardgrid Před 2 lety +28

      Theres a famous story of a British Submarine in the war that used to tey to surface each week minimum to get the news on the BBC World service.
      One week, they detected a German boat and had to delay their ascent.
      When they did surface, they caught the very end of the broadcast which was "Arsenal, nil"

    • @havesomerubicon6097
      @havesomerubicon6097 Před 2 lety +12

      @@zachbailey457 Its a J O K E

    • @kayla-hn8zr
      @kayla-hn8zr Před 2 lety +20

      @@havesomerubicon6097 jokes are funnier when they make sense

  • @beezwacks
    @beezwacks Před 2 lety +574

    I love how they reunite and how surprised stella looks when an apple falls because it has been 11 years since she has experienced earth gravity

  • @Z.H.O
    @Z.H.O Před 2 lety +96

    This video reminds me of when I came back to class after missing a few important days.

  • @hridakshipareek1418
    @hridakshipareek1418 Před 3 lety +4512

    Imagine saying "Yeah she's my twin but she's 11 years older than me"

  • @akhmadmasykur5626
    @akhmadmasykur5626 Před 4 lety +21133

    "Terra and Stella now both have a better understanding of how spacetime works"
    Me : Ok, but I don't

    • @satendra_sharma
      @satendra_sharma Před 4 lety +97

      Light-speed traveling equals Time-travel into future

    • @mrjoe332
      @mrjoe332 Před 4 lety +179

      Have in mind that Stella was already an astronaut to begin with. So they were a couple of steps ahead

    • @marccolten9801
      @marccolten9801 Před 4 lety +50

      Terra? Stella? Hey, I just got it!

    • @shanerooney7288
      @shanerooney7288 Před 4 lety +114

      "Terra and Stella now both have a better understanding of how spacetime works"
      Me: "you'd think they'd have an understanding BEFORE becoming astronauts.

    • @clairetakeuchi4123
      @clairetakeuchi4123 Před 4 lety +28

      Bruh. Are children suposed to understand this it’s on ted ed

  • @homerlandon8767
    @homerlandon8767 Před 2 lety +427

    Special relativity is making a 6 minute video feel like an hour long

  • @RizzytheWizzy
    @RizzytheWizzy Před 2 lety +108

    "We`re twins!"
    "Really? Who's the older twin?"
    Terra: "Me, by 11 years."

  • @rashidsayyed1443
    @rashidsayyed1443 Před 3 lety +12123

    Don't worry if you can't understand anything in 6 minutes ,it took 23 years for terra and 11 years for stella to understand 😂

    • @Juanmaligno
      @Juanmaligno Před 2 lety +44

      💀💀💀

    • @GameTime-yj6qv
      @GameTime-yj6qv Před 2 lety +308

      Took me a year just to understand who was Terra and who was Stella 🤣

    • @Caiyde
      @Caiyde Před 2 lety +101

      Terra is Latin for Earth, & Stella is Latin for Star. Their names correspond with their location

    • @rashidsayyed1443
      @rashidsayyed1443 Před 2 lety +9

      @@Caiyde 😯 oh nice

    • @GameTime-yj6qv
      @GameTime-yj6qv Před 2 lety +46

      @@Caiyde yes, clever, but their names sounded very similarly and were mentioned very often. They should have gone with very different sounding names or label the little faces on the screen.

  • @mstegosaurus
    @mstegosaurus Před 4 lety +3666

    As a 42 year old, I'm slightly offended by how old you made 43-year-old Terra look.

  • @ferda9476
    @ferda9476 Před 2 lety +62

    Oh I get it now.
    Terra -> means "earth" -> stays behind on earth.
    and "Stella" -> stellar -> stars -> goes to space
    That's all i understood though

  • @ezmeeplays2125
    @ezmeeplays2125 Před 2 lety +65

    For people who do not understand, basically the twin paradox is where the saying that time goes slower in space is challenged, when in reality it goes extremely slow in the beggining and extremely fast at the end, equalling it out.

    • @Tolafasolaxd
      @Tolafasolaxd Před rokem +2

      thank you so much, so does that mean they are gonna be the same age biologically?? and those years lasted the same amount of time for both of them?]

    • @MohitSharma-th4qt
      @MohitSharma-th4qt Před 9 měsíci +11

      @@Tolafasolaxd No. As the video explained, they are biologically going to be 11 years apart, when stella returns from her journey.
      @ezmeeplays2125 is wrong in saying that it all 'equals out'

    • @HVBRSoF
      @HVBRSoF Před 9 měsíci +5

      @@Tolafasolaxd no. only the perception equals out. the biological truth bears the difference, since the one on the ship would age slowly because time itself is moving slower on the ship. when i say time, i mean physical time, not just theoretical time.
      think about it this way. Stella on the ship would have her cells divide more slowly. Terra on earth would have her cells dividing faster, which is why she is going to age more while Stella will be younger.

    • @miro-hristov
      @miro-hristov Před 3 měsíci

      Why would stella still be younger by 11 years at end tho?

    • @robertwilsoniii2048
      @robertwilsoniii2048 Před 2 měsíci

      It doesn't equal out. Stella is more than 10 years younger than Terra because she flew at 86% of the speed of light. If Stella flew slower they'd be closer in age, except it would take so long that they would both die of old age before seeing each other again. The human lifespan is too short for space travel. If we can live longer then it can be possible but this doesn't refute the fact that faeter travel means slower motion. That's what it comes down to. Slower motion means slower cell turnover which means others will die before you because their cells moved more than yours. Less motion means less aging.

  • @katanaquits5255
    @katanaquits5255 Před 4 lety +2860

    “Your fish died”
    “1 year old, r.i.p”

    • @gabox17da88
      @gabox17da88 Před 4 lety +11

      how is the fish 1 year old if the message is after 1 year idu

    • @darkboy2216
      @darkboy2216 Před 4 lety +18

      GaBoX17 DA the text says "1 yr old rip" as in "this rip was sent 1 yr ago"

    • @farrel_ra
      @farrel_ra Před 4 lety +4

      @@darkboy2216 but stella receive it many years later so yeah

    • @amaan1468
      @amaan1468 Před 3 lety +3

      @@farrel_ra ya so for terra 2 yrs had passed
      1st yr - msg frm terra to Stella
      2nd yr - msg frm Stella to terra.

    • @noisyguest5249
      @noisyguest5249 Před 3 lety

      Many year passed in earth where only 1 year passed for stella

  • @CassieLino
    @CassieLino Před 4 lety +3079

    If I ever have twin girls, I'm naming them terra and stella and telling them stella gets to be an astronaut but terra has fish to babysit

    • @mafumafusnumberonefan
      @mafumafusnumberonefan Před 3 lety +35

      If you are unaware of this comment, I will tell you that this comment has blown up to over 1k likes.

    • @icantthinkofaname4129
      @icantthinkofaname4129 Před 3 lety +2

      This made my night thanks

    • @shahinazmeerriza5377
      @shahinazmeerriza5377 Před 3 lety

      I think she meant Tara not Terra

    • @reinebautistamercado4286
      @reinebautistamercado4286 Před 3 lety +12

      @@shahinazmeerriza5377 It's Terra. Terra means earth, while Estella means star. They are Spanish words derived from Latin words with the same meaning.

    • @shahinazmeerriza5377
      @shahinazmeerriza5377 Před 3 lety +1

      @@reinebautistamercado4286 Thanks for explaining ❤️
      I knew terra was Italian for land but didn't think about Stella

  • @rahuldwivedi4758
    @rahuldwivedi4758 Před rokem +14

    One thing that's subtle and may further make difficult to understand is the following fact: Stella is moving at the speed of 86% of the light you have to keep remembering that so by the time the light signal from terra covers a light year, Stella would have further moved and the distance between the signal and her would be 72 % of a light year and so on so forth. Hence in about 7 years the first light signal reaches her.

    • @_Ace_143
      @_Ace_143 Před 9 měsíci

      THANAAANK YOOOUUU

    • @maxmersmann-jones1222
      @maxmersmann-jones1222 Před měsícem

      But isn’t the whole premise of c being constant that I can’t tell how fast I’m moving by how long it takes c to reach me? C moves towards all moving objects at c, no?

  • @alexcheema6270
    @alexcheema6270 Před 2 lety

    Loved this! Thanks Amber for the amazing video

  • @O4C209
    @O4C209 Před 4 lety +7415

    For everyone not getting it, we're the cat in the quote at the beginning of the video.

    • @karolalpha
      @karolalpha Před 4 lety +140

      That's the only thing that I understood! LOL

    • @brunobielecki311
      @brunobielecki311 Před 4 lety +31

      I feel like the video is more about consequences of this not why this exists. I mean they talk about how the twin see the other one and where time goes slower but i didnt get why. Only this formula at the start saying that "faster u go, slower the time". Mayeb i missed sth or its just too complex to explain.

    • @fantastiskchow8830
      @fantastiskchow8830 Před 4 lety +7

      wise words!

    • @gianlucadegliesposti7241
      @gianlucadegliesposti7241 Před 3 lety +9

      I had an exam on general relativity and this is literally the topic that took the most for me to grasp

    • @nicedubs8163
      @nicedubs8163 Před 3 lety +9

      Meow?

  • @burningphoneix
    @burningphoneix Před 4 lety +3283

    Here I was thinking "Oh! So they'll both end up the same age when they're back together" and getting it completely wrong means I understood pretty much nothing

    • @abderahmanffoujamaa4938
      @abderahmanffoujamaa4938 Před 4 lety +3

      The same

    • @twilightundersky8658
      @twilightundersky8658 Před 4 lety +33

      *but both twins know that it’s not that simple*
      No offense but that line was meant to be for you XD

    • @Serquest
      @Serquest Před 4 lety +4

      its pretty simple she is traveling at 86.6% of the speed of light, thus due to special relativity she experiences time twice as fast. thus it will take 11.5 years 11 years* where for the other twin on earth the journey takes 23 years

    • @stuartburkett4565
      @stuartburkett4565 Před 4 lety +1

      @@Serquest how can you say Terra has zero inertial reference frame relative to the universe. There is no absolute zero velocity reference point in the universe that everything else is moving relative to.
      So Terra and Stella from each persons perspective, Stella is moving at 86% C away from Terra or Terra is moving at 86% C away from Stella.
      I don't understand the explanation of the paradox.

    • @harrisoningham5992
      @harrisoningham5992 Před 4 lety

      I think you’re getting mixed up between velocity and acceleration she is in a non inertial reference frame relative to the universe that’s where the paradox comes in the part that’s overlooked is that when she changes directions she forgets to account for her new reference frame

  • @davidrincon4602
    @davidrincon4602 Před rokem +1

    This is the best produced Ted-Ed animation I've seen. The music and the animation are beautiful.

  • @smartperson1
    @smartperson1 Před rokem +3

    This was a fantastic refresher of my college quantum physics unit. Succinctly summarized a few weeks of lectures into a few minutes.

  • @yanwong523
    @yanwong523 Před 4 lety +5178

    "Stella" means 'star'
    "Terra" means 'Earth'

    • @ejmtv3
      @ejmtv3 Před 4 lety +229

      Well that's one easy way to distinguish them! I forgot which is which along the video

    • @princezhedricksilvestre8168
      @princezhedricksilvestre8168 Před 4 lety +8

      Is it Spanish or Latin @Yan Wong

    • @o.602
      @o.602 Před 4 lety +12

      Perfect, as everything should be.

    • @pauaguero6910
      @pauaguero6910 Před 4 lety +51

      @@princezhedricksilvestre8168 latin. In Spanish star is "Estrella" and earth is "Tierra"

    • @amuro9624
      @amuro9624 Před 4 lety +29

      Thought it was pretty obvious...

  • @brandono.9711
    @brandono.9711 Před 3 lety +17021

    Meanwhile, I'm here confused about which one is Stella and Tera.

  • @nathanfisher1387
    @nathanfisher1387 Před 10 měsíci

    VERY WELL DONE. The graph made it so easy to understand.

  • @cherryontop821
    @cherryontop821 Před 2 lety +81

    Wait so Stella actually physically aged slower and is biologically 11 years younger than Terra ? Like in appearance and anatomy and all? That is absolutely mind blowing

    • @AMC2283
      @AMC2283 Před 2 lety +5

      Correct, it’s the poor man’s hyperdrive.

    • @PeterSedesse
      @PeterSedesse Před rokem +2

      NASA already did this with the Kelly twins ( one now a senator ).

    • @JimmyVermeer
      @JimmyVermeer Před rokem +2

      Same thing happened in the movie Flight of the Navigator. I loved that movie as a kid.

    • @Tolafasolaxd
      @Tolafasolaxd Před rokem +4

      @@AMC2283 wait but in documents they are the same age??? Did they experience time differently? I dont get it:((( Lets say hypoteticly they both are gonna start playing guitar, one on the space ship and other on the earth, and lets say that learning it goes identically for both twins, so does that mean that tera is gonna be much better player then stella when they reunite??

    • @AMC2283
      @AMC2283 Před rokem +6

      @@Tolafasolaxd if you need a year of lessons to get good, terra will be better, since a year for terra could be a month for Stella

  • @JoaoSilva-mp7ye
    @JoaoSilva-mp7ye Před 3 lety +3802

    Teacher: Don't worry class, the test is going to be easy.
    The test:

  • @mekilaolandesca8119
    @mekilaolandesca8119 Před 4 lety +2956

    Doctor: you have six months to live
    Stella: lets make that a year

    • @mdridoy-ef2pw
      @mdridoy-ef2pw Před 3 lety +39

      Let's make it infinite!

    • @mraxolotldoesstuff
      @mraxolotldoesstuff Před 3 lety +4

      md ridoy that’s what I was going to say!

    • @TheNighKnight
      @TheNighKnight Před 3 lety +109

      Thats not actually how it works, is it?Youre still going to die in 6 months, but if youre in space and travelling close to speed of light, youd still be dead in 6 months but a year would have passed only for non moving people on Earth.If i understood it correctly.

    • @ashfakhalikm2444
      @ashfakhalikm2444 Před 3 lety +5

      @@TheNighKnight yeah

    • @aaronking2020
      @aaronking2020 Před 3 lety +48

      Stella will be dead in 6 months but to everyone else she will die in a year

  • @Uppernorwood976
    @Uppernorwood976 Před rokem +1

    This is a great explanation, it’s about as simple as it can be made to be!

  • @mahimaraj210
    @mahimaraj210 Před 2 lety +4

    Whenever I get this feeling that I might be good at physics, I watch this video to humble myself
    Really helps
    Thank you.

  • @louisamillerout
    @louisamillerout Před 4 lety +4340

    smart of you to name them "terra" and "stella" for "earth" and "star" so we can easily remember which is which

    • @DeluxHippopatumus
      @DeluxHippopatumus Před 3 lety +134

      I def didnt remember either ones name when i made a terrible comment about earth being flat lol

    • @alaskankara
      @alaskankara Před 3 lety +165

      It took me half the video to realize it and I am fricking italian

    • @kanjamatongewamukoma6888
      @kanjamatongewamukoma6888 Před 3 lety +1

      And you're still beautiful...😍

    • @JesusChrist-il6nc
      @JesusChrist-il6nc Před 3 lety +11

      Yea im able to tell them apart because they have completely different names

    • @breetasengupta4145
      @breetasengupta4145 Před 3 lety +24

      They (Ted Ed) always do this. Specially if you check the Riddles, they have names starting with A, B, C... like typical math variables.

  • @angelocortes7160
    @angelocortes7160 Před 4 lety +4598

    I didnt know Einstein had a twin named Paradox

    • @rutgerniemeijer
      @rutgerniemeijer Před 4 lety +126

      You don't know the great Paradox Einstein? He had the famous math formula E= MC² ≠E

    • @infinityxtanishq8712
      @infinityxtanishq8712 Před 4 lety +5

      😑

    • @opalophelia1274
      @opalophelia1274 Před 4 lety +10

      Hi, i like ur profile picture, its the same as mine, god loves you😊

    • @rgmoses2189
      @rgmoses2189 Před 4 lety +23

      Ya he was the old guy in ben 10 that learned how to travel through time

    • @caterpaw5107
      @caterpaw5107 Před 4 lety +18

      If Einstein will see you comment he will die again

  • @punitaiyengar6988
    @punitaiyengar6988 Před 2 lety +19

    I’m always so intrigued by relativity theory. I just can’t wrap my head about it… perhaps one day, technology will advance so much, that we can experience it in one lifetime. 😌

    • @kingwilliamorange
      @kingwilliamorange Před rokem

      the key is the word itself- relativity i understand whats going on with relativity but what freaks me out is knowing that something out there is happening simultaneous to this exact moment but due to vast distances that the light reflected off it must travel for us to see it it hasnt happened yet

  • @gavinmiller3279
    @gavinmiller3279 Před 9 měsíci

    One of the top 10 videos on CZcams!

  • @9836824666
    @9836824666 Před 3 lety +8004

    Normal twins: oh let’s dress up alike and confuse everyone
    Terra and Stella: hold my beer

  • @swastiksahu6889
    @swastiksahu6889 Před 4 lety +57286

    I'll pretend I understood everything

  • @quokka_11
    @quokka_11 Před 2 lety +12

    This is why I always accelerate when running. Start slow, accelerate constantly, and keep the warm-down short. You will age a little less.
    Same with driving.

  • @thelaststand8993
    @thelaststand8993 Před 11 měsíci +4

    While reading my Physics textbook,I had this exact confusion,now I am clear.Though I dont understand it deeply,you guys has solved my confusion❤

  • @whistletoe
    @whistletoe Před 2 lety +12028

    I love how their names represent where they are! Stella (meaning star) for the astronaut and Terra (meaning earth) for the one at home :)

    • @meshackmuli2809
      @meshackmuli2809 Před 2 lety +386

      I couldn't even understand which one was on Earth and the one in space

    • @cajm367
      @cajm367 Před 2 lety +76

      underrated comment

    • @khalidrafi3309
      @khalidrafi3309 Před 2 lety +62

      wow
      never thought of that.
      you have a great mind

    • @hillerychan9483
      @hillerychan9483 Před 2 lety +35

      @@meshackmuli2809 Terra was the twin on earth and Stella was one in space

    • @SpinningSidekick
      @SpinningSidekick Před 2 lety +4

      Im calling the fbi

  • @turkeybowlwinkle4440
    @turkeybowlwinkle4440 Před 3 lety +3896

    I didn't understand that until my cat explained it to me.

  • @mdv3435
    @mdv3435 Před 2 lety +26

    For anyone who doesn’t understand the graphics. Remember that Speed = Distance / Time and in this instance, the speed of the light-message will be constant.

  • @cheeseplease2832
    @cheeseplease2832 Před 2 lety +17

    I'm a physics teacher now and I can't believe how few years ago I passed the subject special relativity at university lol.😂 I understood half of it but now after teaching, I understand it all.

  • @eat6270
    @eat6270 Před 3 lety +2383

    Everything was alright untill stela left the Earth 😵

    • @wildfire2835
      @wildfire2835 Před 3 lety +39

      She should never have left. lol 😂

    • @TacticusPrime
      @TacticusPrime Před 3 lety +12

      **returned** to Earth. It's the change in reference frame and bringing the two twins back together that makes one definitively older than the other.

    • @sevdamustafazad3564
      @sevdamustafazad3564 Před 2 lety

      :D

    • @bommtatak
      @bommtatak Před 2 lety

      😂😂😂

    • @teodoirvanstaden
      @teodoirvanstaden Před 2 lety

      That's quite... Well... Stella(r) ;)

  • @paraiso1972
    @paraiso1972 Před 4 lety +3897

    Still very confused, but on a much higher level now. Thanks.

    • @ultimaxkom8728
      @ultimaxkom8728 Před 4 lety +45

      @Belial Made it confusing on purpose? They're _"Explaining"_ it in a more detailed, technical way. Why? Well because as you already said, you already knew the answer. But then, _how can it be the answer?_ That's is what they're on about. Also no, it's not really that confusing - I suggest you to give it another try.

    • @lalawmliana7436
      @lalawmliana7436 Před 4 lety +1

      same

    • @tajayatomlinson5298
      @tajayatomlinson5298 Před 4 lety +1

      Loool saaammmeee

    • @zodiacfml
      @zodiacfml Před 4 lety +4

      they dont understand the root of the peoblem themselves

    • @stellrspellr444
      @stellrspellr444 Před 4 lety +4

      lmao my name is stella so I'm even more confused, dude

  • @CaitLumos
    @CaitLumos Před 2 lety +11

    It took me over half the video to realize their names helped you know which one was in space and which one was at home because Stella=star and Terra=earth.

  • @Fightingsquidtattoos
    @Fightingsquidtattoos Před 2 lety

    I can still never wrap my head around this concept.

  • @coconutinacap
    @coconutinacap Před 4 lety +3072

    Noone:
    Absolutely none:
    Terra: i BoUghT yOu a fIsH

  • @aminathismail2501
    @aminathismail2501 Před 4 lety +1172

    “Terra and Stella now both have a better understanding of how spacetime works.”
    Good for them because now even the only functioning brain cell I have is malfunctioning.

  • @rauldurand
    @rauldurand Před rokem

    Best explanation I found!

  • @shuzennn
    @shuzennn Před 2 lety +1

    This just makes me believe even more that I have already lived this life, but only now I am experiencing it in Earth time.

  • @lunarmoon7636
    @lunarmoon7636 Před 3 lety +678

    5:47 "Terra and Stella now have a better understanding of how spacetime works"
    oh good that makes one of us

    • @Aeviu
      @Aeviu Před 3 lety +35

      two*

    • @assiaisindegyara4905
      @assiaisindegyara4905 Před 3 lety +9

      Honestly i think i understand it less. I'd heard that time changes speed when in space. Fine i don't get it but it's none of my business
      Now theres all the details that i'm not going to remember the order in but i'll still try to spit it out as a thing i know and get it super wrong.

    • @elisedutcher4923
      @elisedutcher4923 Před 3 lety

      Ikr

  • @kidpeligro7878
    @kidpeligro7878 Před 4 lety +655

    Watching this and I was like..
    "Damn, I'm dumber than I actually thought I was"

    • @cessmaga5873
      @cessmaga5873 Před 4 lety

      Same

    • @noodboy4633
      @noodboy4633 Před 4 lety +3

      i already knew this...i watched because i'm bored

    • @Tameinsight
      @Tameinsight Před 4 lety +3

      too many distractions to think this one through

    • @maxthepaladin2147
      @maxthepaladin2147 Před 4 lety +1

      It reminds me of this conversation from one of the Discworld books:
      -He was a good, clever kid. To be honest, before his lectures I never really understood magic
      -Me neither. But do you now?
      -Well...no. But at least I know how much I don't know now
      The two mages then felt a surge of pride from their ignorance being superior to the average person

    • @seetaals
      @seetaals Před 4 lety +2

      Nope, the video just didn’t explain it properly

  • @ashchoosespikachu
    @ashchoosespikachu Před 2 lety

    Loved the doctor who reference at the end!

  • @wizardglick9609
    @wizardglick9609 Před 2 lety

    Great Scott!!

  • @timetraveller4336
    @timetraveller4336 Před 4 lety +2430

    "Wibby wobbly timey wimey stuff"
    I see the writers are people of culture

  • @sahilchouhan6459
    @sahilchouhan6459 Před 3 lety +2073

    This was the most confusing 6 minutes and 15 seconds of my life.

    • @weckar
      @weckar Před 3 lety +80

      Really? It was only about 3 minutes and 7 seconds for me.

    • @Ariadne4
      @Ariadne4 Před 3 lety +15

      @@weckar are you watching this from space then?😂

    • @joaosas
      @joaosas Před 3 lety +42

      @@Ariadne4 no they just watched it at 2.0x speed

    • @cocainebarbiee_
      @cocainebarbiee_ Před 3 lety +4

      ON GOD 😂😂

    • @coffe1170
      @coffe1170 Před 3 lety +8

      Im like half asleep rn so it makes even less sense

  • @magick333
    @magick333 Před 2 lety

    amazingly explained

  • @helenfranks5784
    @helenfranks5784 Před 2 lety

    Love the choices of names

  • @theEXOaudio
    @theEXOaudio Před 4 lety +582

    has that one opportunity to send one message per year to twin: "I bought you a fish"

  • @mandymoorehhh
    @mandymoorehhh Před 4 lety +2323

    1:18 -> me trying to understand this Ted Ed video

  • @gregdorfman1821
    @gregdorfman1821 Před 4 měsíci

    This is best twin paradox explanation on youTube.

    • @zakelwe
      @zakelwe Před 3 měsíci

      But it's wrong.

  • @EetFuk8
    @EetFuk8 Před 10 měsíci

    I was confused about all this before watching this, and now I am way more and more confused. Thanks!

  • @filmfan4
    @filmfan4 Před 4 lety +1081

    114 years today since The Theory of Special Relatively was published!

  • @ekyasamahardika5253
    @ekyasamahardika5253 Před 4 lety +1527

    "They both have a better understanding of how spacetime works"
    Good for them. Meanwhile me...

  • @marianavarro4704
    @marianavarro4704 Před 2 lety

    Good morning . Waking up to this in your recommendation after a super typhoon is....

  • @madsa1480
    @madsa1480 Před 2 lety +2

    I don't understand what happened in this video but I'm glad those twins are happy and learning things :)

  • @Nightcoffee365
    @Nightcoffee365 Před 4 lety +2066

    Wibbly wobbly timey wimey like.

    • @brookbouvier7749
      @brookbouvier7749 Před 4 lety +25

      David tennant just sneezed

    • @G.F.SF55
      @G.F.SF55 Před 4 lety +23

      Whovians are everywhere 👀, even in TED-ED

    • @randomwhovian1075
      @randomwhovian1075 Před 4 lety +5

      Allons-y Alonzo!!

    • @dta1801
      @dta1801 Před 4 lety +5

      I read your comment right at the moment she said it. XD

    • @cwu4591
      @cwu4591 Před 4 lety +6

      GERONEMOOOOOOOOOOOOOOOOOOOO

  • @Noor-ib5hf
    @Noor-ib5hf Před 4 lety +2336

    The cure to anti-aging: live in space and never come back

    • @vandanaasthana1216
      @vandanaasthana1216 Před 4 lety +132

      Actually you age at the same rate for you but slowly for others...

    • @Lord_Of_Night
      @Lord_Of_Night Před 4 lety +53

      @@vandanaasthana1216 Yeah, but from the perspective of someone on Earth, you'd be much longer lived.

    • @ni3070
      @ni3070 Před 4 lety +32

      @@Lord_Of_Night and how does that matter to you?

    • @Lord_Of_Night
      @Lord_Of_Night Před 4 lety +18

      @@ni3070 It doesn't. I was just pointing it out.

    • @Andy-js5jy
      @Andy-js5jy Před 4 lety +1

      But why you didn't have boyfriend/girlfriend in space?

  • @voidparadox3649
    @voidparadox3649 Před 4 měsíci +1

    This is mindblowing

  • @MrGriff305
    @MrGriff305 Před 5 měsíci

    I didn't realize that directionality of motion affected the lorentz transformation and that a different reference frame moving at high velocity could see the other reference frame's timing passing faster. Now I'll have to study this again.

  • @loriwilliams5724
    @loriwilliams5724 Před 4 lety +558

    Whew, the relief I feel reading the comments and realizing I’m not the only one that gets everything and nothing all at the same time. Thanks guys!!

    • @subbaiahkasi6310
      @subbaiahkasi6310 Před 4 lety +7

      Lori Williams I don’t get any of it.

    • @nurindahsaloka9491
      @nurindahsaloka9491 Před 4 lety

      I won't push the like button cause the number is nice

    • @adambaker4581
      @adambaker4581 Před 4 lety

      @@nurindahsaloka9491 i missed it what was it at😂

    • @nurindahsaloka9491
      @nurindahsaloka9491 Před 4 lety

      @@adambaker4581 123 😂

    • @mimica1314
      @mimica1314 Před 4 lety

      Yeah like you got the ideia, but have no understanding of the science behind it XD like spaceship goes swooooch very fast and then very slow and batabi batabo they are 11 years apart

  • @Pandastic_Dennis
    @Pandastic_Dennis Před 3 lety +1865

    Me: Lets watch this video to understand the Twin Paradox
    Brain: Error 404 - explanation not found

    • @lExN34
      @lExN34 Před 3 lety +10

      Catastrophic error

    • @kenya24pie
      @kenya24pie Před 3 lety +2

      🤣🤣🤣

    • @ohcool8314
      @ohcool8314 Před 3 lety +5

      Bruh same, i even bought a comic kid about this thing and still confused

    • @Perririri
      @Perririri Před 3 lety +1

      Normie

    • @--------352
      @--------352 Před 3 lety +4

      @@ohcool8314 bassicly the faster you move the slower you age Terra was not moving but Stella was (relatively) and because time slows down the faster you move Stella is younger
      Moving = younger
      Stationary = older

  • @lucaslucas191202
    @lucaslucas191202 Před rokem +3

    And the fun part about all of this, is that all of this can be logically concluded simply from the fact that the speed of light is constant. (Which we found out basically by seeing that no matter how we measure light in vacuum it's speed is constant.)

  • @Kageoni187
    @Kageoni187 Před 2 lety

    Love the Dr.Who reference!

  • @sadiajavaid8717
    @sadiajavaid8717 Před 3 lety +792

    Came to feel smarter....went away feeling like the cat they talk about at the start...😂😂😂😂

  • @gabrielam.7681
    @gabrielam.7681 Před 4 lety +1272

    All I got from this was a prime example of sibling rivalry.
    Like, who tf goes to space just to prove a point

    • @Keizenholdt
      @Keizenholdt Před 4 lety +94

      That's the exact reason the U.S. went to the moon :)

    • @okas425
      @okas425 Před 4 lety +2

      Teacup _ ikr it’s not like it’s an example or anything

    • @gabrielam.7681
      @gabrielam.7681 Před 4 lety +8

      @@okas425 its not like it's a joke or anything either right? 😂

    • @merikijiya13
      @merikijiya13 Před 4 lety +10

      I’d totally do that to my sister. Since she thinks she’s soooo much better. I went to space!!! I’d rub it in her smug face!

    • @okas425
      @okas425 Před 4 lety +2

      Teacup _ It was more of a hypothetical statement but if it’s intended use was a joke then sure why not

  • @magicmjk09
    @magicmjk09 Před 2 lety

    A beautiful animation again.

  • @ManofSteel-km9bl
    @ManofSteel-km9bl Před rokem +1

    This is a very complicated explanation of this paradox.. The paradox is actually very easily understandable

  • @jameszhang1280
    @jameszhang1280 Před 4 lety +439

    I’ve just realized that this could be a time machine. Go into space for 10 years, see the earth 20 years later.

    • @RK-ep8qy
      @RK-ep8qy Před 4 lety +5

      That's the general outline of time travel

    • @jonathansauceda589
      @jonathansauceda589 Před 4 lety +12

      You can't go back tho
      depresso

    • @loosalat1244
      @loosalat1244 Před 4 lety +22

      thats basically the movie interstellar lol

    • @Lenoxuss
      @Lenoxuss Před 4 lety +12

      That's absolutely correct. In fact, even people who spend a lot of time traveling at a high rate of speed, such as flight attendants, do in fact experience a slower rate of time than others. But that's only as a miniscule rate, adding up to a fraction of a fraction of a second even over the course of a lifetime.
      modern rocketry is faster but (I think) still wouldn't cause more than a few minutes of "time travel" after a journey of years.

    • @howisgamora_
      @howisgamora_ Před 4 lety +2

      Yes but to truly travel time you need to get time to go backwards too

  • @JonnyRKR
    @JonnyRKR Před 3 lety +1516

    “Let’s pick the most convoluted way of explaining time dilation with the cutest animations.” Them, probably.

    • @kathrynmercier4874
      @kathrynmercier4874 Před 2 lety +19

      @@erikchristian3894 I also thought the graph was excellent. I do see why many people struggle understanding this video though because it doesn’t actually explain what special relativity is and how it works in much detail at all. This video is great though once you come back to it after understanding SR.

    • @zakelwe
      @zakelwe Před rokem +1

      It even gets the answer wrong after all that ....

    • @craigape
      @craigape Před rokem +2

      Yeah, this was pretty rough. I'm still struggling with accepting that it's at all okay to directly correlate the time between light pulses with the speed of aging since we're accepting that it's artificially changed by whether you're coming or going.
      Maybe that was the point, but if you're using faulty data why should I trust a conclusion reached from it? I don't know, something feels off with this explanation. I probably just need to research the subject more prior.

  • @7Lace77
    @7Lace77 Před 2 lety

    Their faces are hilarious. 😸 A good explanation.

  • @user-to6wg4uo2u
    @user-to6wg4uo2u Před měsícem

    Interesting theory video on time travel

  • @bugayden2287
    @bugayden2287 Před 4 lety +864

    Them: Her journey should take 23 years
    Me: Great! That seems pretty straightforward.
    Them: Pulls out the real science
    Me: Brain no work

    • @bugayden2287
      @bugayden2287 Před 4 lety +5

      Aaron L. I thought planet of the apes was about the Simian Flu and it’s infection of humanity in an attempt to cure Alzheimer’s. Are we thinking of the Dawn/Rise/War of the Planet of the Apes? Or something else entirely?

    • @IABITVpresents
      @IABITVpresents Před 4 lety

      So if you travel faster than light... would that mean you are able to upend time backwards?

    • @IABITVpresents
      @IABITVpresents Před 4 lety

      @@lued123 Does antimatter contain negative mass?

    • @IABITVpresents
      @IABITVpresents Před 4 lety

      @@lued123 so why is antimatter anti?

  • @misanthropologist.
    @misanthropologist. Před 3 lety +1276

    is noone talking about how the fish died

  • @Gurseerat_Singh
    @Gurseerat_Singh Před rokem +3

    I think there's am issue here, when you started drawing the graphs, you took terra at rest and drew a straight vertical line for her with 23 dots uniformly placed however drawing a straight vertical line would mean you considered terra ar absolute rest which makes no sense as rest or motion are relative terms. The same graph can be drawn by taking stellar at absolute rest and the result would come out to ne opposite, terra would come out to be the younger one, so i don't think this silves the paradox.
    Ik this video is quite old but please reply if you can.

    • @silverrahul
      @silverrahul Před rokem +1

      " _drawing a straight vertical line would mean you considered terra ar absolute rest which makes no sense as rest or motion are relative terms_ "
      NO. drawing a straight vertical line does NOT mean that he considered terra at absolute rest. It means in the frame, in which the drawing is being drawn, she is at rest.
      " _The same graph can be drawn by taking stellar at absolute rest and the result would come out to ne opposite, terra would come out to be the younger one, so i don't think this silves the paradox_ "
      you cant draw a graph taking anyone at absolute rest, because there is no such thing as absolute rest. You CAN draw a graph in the frame in which stella is at rest during the first leg, or one in which she is at rest during the second leg. But, the result would come out the same, however it would be a bit more complicated to draw, since stella undergoes acceleration at the turnaround.

  • @potza2703
    @potza2703 Před 2 lety

    this animation is beautiful

  • @sarahf662
    @sarahf662 Před 4 lety +428

    "Terra" meaning Earth stayed on Earth, wheras "Stella" relating to stars went to space. Love that clever addition!

  • @aisleshic2721
    @aisleshic2721 Před 4 lety +509

    *me 2 minutes into the video*
    "so which is stella again?"

    • @danielcohen88
      @danielcohen88 Před 4 lety +42

      Stella = stellar = relating to stars = in space
      Terra = terrestrial = relating to earth = on earth

    • @ronweasley5347
      @ronweasley5347 Před 3 lety

      Lol hahahha

    • @viraj5079
      @viraj5079 Před 3 lety

      @@danielcohen88 fascinating

  • @chrissy9153
    @chrissy9153 Před 2 lety

    I couldn’t imagine being away for that long

  • @mark.g.alford
    @mark.g.alford Před 10 měsíci

    All correct, although the key point is postponed to the end: one twin's trajectory is in the same inertial (constant velocity) frame the whole time, whereas the other twin's trajectory consists of two different inertial frames. So there is an objective distinction between them.

  • @lakshya005
    @lakshya005 Před 3 lety +523

    Me : Why am not understanding anything..?
    Me (checks the comment): I am not ALONE..🙂

  • @ma3n636
    @ma3n636 Před 3 lety +507

    *Terra:* I'm feeling sad, I'm not sure I can do this anymore.
    *Stella:* Apologies for the delay are you still there?

    • @sage3260
      @sage3260 Před 3 lety +4

      i actually laughed out loud at this

    • @rinsawerig4147
      @rinsawerig4147 Před 3 lety +2

      Oh my
      This one got dark...still funny though
      Wonder what that says about us....

    • @janetsworld9734
      @janetsworld9734 Před 2 lety +2

      lmaoo these comments are gold

  • @whimsical-divine
    @whimsical-divine Před 2 lety

    this is awesome

  • @waffleisnice
    @waffleisnice Před 10 měsíci

    Somewhere in this video my mind when somewhere else but i still watch to the end

  • @joroz9808
    @joroz9808 Před 4 lety +850

    I felt like Chidi trying to understand the dot in the “i” of Jeremy Bearimy while watching this

  • @SuperRedux
    @SuperRedux Před 2 lety +2380

    Whenever I have trouble sleeping , I watch this video and fall asleep halfway through it

  • @archive6094
    @archive6094 Před 2 lety +3

    God the concept of time is so fascinating

  • @Cheesecakess
    @Cheesecakess Před 2 lety

    I didn't understand a thing but loved the artwork!