Einstein's twin paradox explained - Amber Stuver

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  • Опубликовано: 19 июн 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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Комментарии • 8 тыс.

  • @akhmadmasykur5626
    @akhmadmasykur5626 4 года назад +21225

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

    • @satendra_sharma
      @satendra_sharma 4 года назад +99

      Light-speed traveling equals Time-travel into future

    • @mrjoe332
      @mrjoe332 4 года назад +179

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

    • @marccolten9801
      @marccolten9801 4 года назад +51

      Terra? Stella? Hey, I just got it!

    • @shanerooney7288
      @shanerooney7288 4 года назад +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.

    • @bubblebath2892
      @bubblebath2892 4 года назад +9

      Me toooooo, I dnt get it

  • @Bavonc
    @Bavonc 4 года назад +10448

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

    • @shiningstar2843
      @shiningstar2843 4 года назад +135

      Same and so the first quote was an attack on us :(

    • @Lucky_2109
      @Lucky_2109 4 года назад +33

      @@shiningstar2843 so we are the cat ?

    • @Mspandaninja88
      @Mspandaninja88 4 года назад +2

      Hahahahah

    • @niranjanpunnokkil8177
      @niranjanpunnokkil8177 4 года назад +1

      😂😂😂

    • @skyjack8541
      @skyjack8541 3 года назад +16

      Wrong.....this is the look of adults listening to babies talk.

  • @sandippaul468
    @sandippaul468 2 года назад +3882

    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.

    • @asha2755
      @asha2755 2 года назад +45

      🤣🤣🤣🤣🤣

    • @thatoneerumpenthorn1512
      @thatoneerumpenthorn1512 2 года назад +133

      This was a genuinely good joke lmao

    • @Elliyan4
      @Elliyan4 2 года назад +31

      that was genius

    • @aboxinspace
      @aboxinspace 2 года назад +39

      I was watching this at work (slow friday) and freakin laughed out loud. Goddammit. 10/10

    • @RiverSophiel112
      @RiverSophiel112 2 года назад +4

      😂😂😂👌

  • @beezwacks
    @beezwacks 2 года назад +606

    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

  • @Rye-ug3wf
    @Rye-ug3wf 4 года назад +17410

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

    • @slicks5086
      @slicks5086 4 года назад +115

      Orange juice noise

    • @twilightundersky8658
      @twilightundersky8658 4 года назад +32

      Grucci _ *noice*

    • @parthsheth7207
      @parthsheth7207 4 года назад +87

      I was in a important lecture and out of no where I bust out

    • @makisekurisu8594
      @makisekurisu8594 4 года назад +36

      Ginny Potter wait the video is basically saying you age slower in space than in earth

    • @mahbubrm2148
      @mahbubrm2148 4 года назад +4

      Rest is history

  • @dreamerdazegirl
    @dreamerdazegirl 4 года назад +5984

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

  • @fastica
    @fastica 2 года назад +1606

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

    • @mavi2643
      @mavi2643 2 года назад +31

      cats are smart

    • @sandippaul468
      @sandippaul468 2 года назад +34

      I would aim even lower.

    • @mirpalmeira
      @mirpalmeira 2 года назад +3

      Something like this

    • @dhruvtripathi4154
      @dhruvtripathi4154 Год назад +4

      Assuming that your cat is good at sarcasm 😁

    • @ismanhaji
      @ismanhaji 3 месяца назад

      @@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?

  • @Z.H.O
    @Z.H.O 2 года назад +117

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

  • @whistletoe
    @whistletoe 3 года назад +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 2 года назад +386

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

    • @cajm367
      @cajm367 2 года назад +76

      underrated comment

    • @khalidrafi3309
      @khalidrafi3309 2 года назад +62

      wow
      never thought of that.
      you have a great mind

    • @hillerychan9483
      @hillerychan9483 2 года назад +35

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

    • @SpinningSidekick
      @SpinningSidekick 2 года назад +4

      Im calling the fbi

  • @brandono.9711
    @brandono.9711 3 года назад +17034

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

  • @ferda9476
    @ferda9476 2 года назад +86

    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

  • @homerlandon8767
    @homerlandon8767 2 года назад +451

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

  • @JoaoSilva-mp7ye
    @JoaoSilva-mp7ye 3 года назад +3815

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

  • @RandomNulls
    @RandomNulls 3 года назад +5225

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

    • @zachbailey457
      @zachbailey457 2 года назад +143

      Four years actually. You need to pay attention.

    • @F1pidis
      @F1pidis 2 года назад +179

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

    • @yardgrid
      @yardgrid 2 года назад +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 2 года назад +12

      @@zachbailey457 Its a J O K E

    • @kayla-hn8zr
      @kayla-hn8zr 2 года назад +20

      @@havesomerubicon6097 jokes are funnier when they make sense

  • @RizzytheWizzy
    @RizzytheWizzy 2 года назад +113

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

  • @ezmeeplays2125
    @ezmeeplays2125 2 года назад +70

    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 Год назад +3

      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 10 месяцев назад +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 10 месяцев назад +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 4 месяца назад +1

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

    • @robertwilsoniii2048
      @robertwilsoniii2048 4 месяца назад

      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.

  • @yanwong523
    @yanwong523 4 года назад +5197

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

    • @ejmtv3
      @ejmtv3 4 года назад +230

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

    • @princezhedricksilvestre8168
      @princezhedricksilvestre8168 4 года назад +8

      Is it Spanish or Latin @Yan Wong

    • @o.602
      @o.602 4 года назад +12

      Perfect, as everything should be.

    • @pauaguero6910
      @pauaguero6910 4 года назад +51

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

    • @amuro9624
      @amuro9624 4 года назад +29

      Thought it was pretty obvious...

  • @O4C209
    @O4C209 4 года назад +7424

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

    • @karolalpha
      @karolalpha 4 года назад +140

      That's the only thing that I understood! LOL

    • @brunobielecki311
      @brunobielecki311 4 года назад +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 4 года назад +7

      wise words!

    • @gianlucadegliesposti7241
      @gianlucadegliesposti7241 4 года назад +9

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

    • @nicedubs8163
      @nicedubs8163 4 года назад +9

      Meow?

  • @rahuldwivedi4758
    @rahuldwivedi4758 Год назад +16

    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 11 месяцев назад

      THANAAANK YOOOUUU

    • @maxmersmann-jones1222
      @maxmersmann-jones1222 2 месяца назад

      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?

  • @nathanfisher1387
    @nathanfisher1387 11 месяцев назад +2

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

  • @rashidsayyed1443
    @rashidsayyed1443 3 года назад +12138

    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 3 года назад +44

      💀💀💀

    • @GameTime-yj6qv
      @GameTime-yj6qv 3 года назад +308

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

    • @Caiyde
      @Caiyde 2 года назад +101

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

    • @rashidsayyed1443
      @rashidsayyed1443 2 года назад +9

      @@Caiyde 😯 oh nice

    • @GameTime-yj6qv
      @GameTime-yj6qv 2 года назад +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.

  • @hridakshipareek1418
    @hridakshipareek1418 3 года назад +4525

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

  • @alexcheema6270
    @alexcheema6270 2 года назад

    Loved this! Thanks Amber for the amazing video

  • @davidrincon4602
    @davidrincon4602 Год назад +1

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

  • @burningphoneix
    @burningphoneix 4 года назад +3287

    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 4 года назад +3

      The same

    • @twilightundersky8658
      @twilightundersky8658 4 года назад +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 4 года назад +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 4 года назад +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 4 года назад

      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

  • @9836824666
    @9836824666 3 года назад +8004

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

    • @rinsawerig4147
      @rinsawerig4147 3 года назад +38

      😂
      Underrated

    • @peanutgangsta284
      @peanutgangsta284 3 года назад +6

      Oooh blblblblblbl🧎‍♀️🧎‍♀️🙇‍♀️

    • @joemax-
      @joemax- 2 года назад +5

      🤣🤣

    • @pokechannel9758
      @pokechannel9758 2 года назад +17

      Terra and Stella : Hold our dress

    • @dlmhdlmd
      @dlmhdlmd 2 года назад +5

      @@pokechannel9758 ?

  • @quokka_11
    @quokka_11 2 года назад +14

    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.

  • @smartperson1
    @smartperson1 Год назад +3

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

  • @paraiso1972
    @paraiso1972 4 года назад +3899

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

    • @ultimaxkom8728
      @ultimaxkom8728 4 года назад +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 4 года назад +1

      same

    • @tajayatomlinson5298
      @tajayatomlinson5298 4 года назад +1

      Loool saaammmeee

    • @zodiacfml
      @zodiacfml 4 года назад +4

      they dont understand the root of the peoblem themselves

    • @stellrspellr444
      @stellrspellr444 4 года назад +4

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

  • @swastiksahu6889
    @swastiksahu6889 4 года назад +57380

    I'll pretend I understood everything

    • @sinoroman
      @sinoroman 4 года назад +485

      this, lmao

    • @ee5142
      @ee5142 4 года назад +160

      Swastik Sahu. Same

    • @sarahnunez318
      @sarahnunez318 4 года назад +685

      Honestly, this is a mood whenever I watch a Ted-Ed video

    • @letsgetlucky_
      @letsgetlucky_ 4 года назад +19

      lol

    • @user-ru3dh5zk5u
      @user-ru3dh5zk5u 4 года назад +12

      @@sarahnunez318 me too

  • @punitaiyengar6988
    @punitaiyengar6988 2 года назад +20

    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 Год назад

      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

  • @cherryontop821
    @cherryontop821 2 года назад +82

    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 2 года назад +5

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

    • @PeterSedesse
      @PeterSedesse Год назад +3

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

    • @JimmyVermeer
      @JimmyVermeer Год назад +2

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

    • @Tolafasolaxd
      @Tolafasolaxd Год назад +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 Год назад +8

      @@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

  • @mekilaolandesca8119
    @mekilaolandesca8119 4 года назад +2971

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

    • @mdridoy-ef2pw
      @mdridoy-ef2pw 4 года назад +39

      Let's make it infinite!

    • @mraxolotldoesstuff
      @mraxolotldoesstuff 4 года назад +4

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

    • @TheNighKnight
      @TheNighKnight 3 года назад +110

      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 3 года назад +5

      @@TheNighKnight yeah

    • @aaronking2020
      @aaronking2020 3 года назад +48

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

  • @coconutinacap
    @coconutinacap 4 года назад +3074

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

    • @HeLow005
      @HeLow005 4 года назад +24

      very funny right?
      hahahah i died laughing

    • @Hermann493
      @Hermann493 4 года назад +26

      @@HeLow005 R.I.P. only 1 year old

    • @patriciawilkin1258
      @patriciawilkin1258 4 года назад +7

      “Your fish died :( “

    • @gamerboi8092
      @gamerboi8092 4 года назад +1

      LMFAO 💀💀

    • @moonflower8890
      @moonflower8890 4 года назад

      POOR GUY just like the fish

  • @CaitLumos
    @CaitLumos 2 года назад +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.

  • @mahimaraj210
    @mahimaraj210 2 года назад +4

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

  • @katanaquits5255
    @katanaquits5255 4 года назад +2865

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

    • @gabox17da88
      @gabox17da88 4 года назад +11

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

    • @darkboy2216
      @darkboy2216 4 года назад +18

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

    • @farrel_ra
      @farrel_ra 4 года назад +4

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

    • @amaan1468
      @amaan1468 4 года назад +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 3 года назад

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

  • @louisamillerout
    @louisamillerout 4 года назад +4344

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

    • @DeluxHippopatumus
      @DeluxHippopatumus 3 года назад +134

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

    • @alaskankara
      @alaskankara 3 года назад +165

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

    • @kanjamatongewamukoma6888
      @kanjamatongewamukoma6888 3 года назад +1

      And you're still beautiful...😍

    • @JesusChrist-il6nc
      @JesusChrist-il6nc 3 года назад +11

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

    • @breetasengupta4145
      @breetasengupta4145 3 года назад +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.

  • @Uppernorwood976
    @Uppernorwood976 Год назад +1

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

  • @Zephee74
    @Zephee74 29 дней назад +1

    Okay but a book about some twin sisters separated one in space one one land and having an emotional scene of one sister seeing each other at the end at different ages at the end would be amazing

  • @angelocortes7160
    @angelocortes7160 4 года назад +4606

    I didnt know Einstein had a twin named Paradox

    • @rutgerniemeijer
      @rutgerniemeijer 4 года назад +127

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

    • @infinityxtanishq8712
      @infinityxtanishq8712 4 года назад +5

      😑

    • @opalophelia1274
      @opalophelia1274 4 года назад +10

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

    • @rgmoses2189
      @rgmoses2189 4 года назад +23

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

    • @caterpaw5107
      @caterpaw5107 4 года назад +18

      If Einstein will see you comment he will die again

  • @mstegosaurus
    @mstegosaurus 4 года назад +3673

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

  • @gavinmiller3279
    @gavinmiller3279 11 месяцев назад

    One of the top 10 videos on RUclips!

  • @thelaststand8993
    @thelaststand8993 Год назад +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❤

  • @CassieLino
    @CassieLino 4 года назад +3096

    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 3 года назад +36

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

    • @icantthinkofaname4129
      @icantthinkofaname4129 3 года назад +3

      This made my night thanks

    • @shahinazmeerriza5377
      @shahinazmeerriza5377 3 года назад

      I think she meant Tara not Terra

    • @reinebautistamercado4286
      @reinebautistamercado4286 3 года назад +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 3 года назад +1

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

  • @mandymoorehhh
    @mandymoorehhh 4 года назад +2324

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

    • @timezone5259
      @timezone5259 4 года назад +17

      #relatable

    • @scbikakku8558
      @scbikakku8558 4 года назад +7

      im screaming 💀💀💀

    • @BlackHatTy
      @BlackHatTy 4 года назад +2

      Yup

    • @s103792
      @s103792 4 года назад +1

      "Uh huh, oh yes of course, makes perfect sense ... wtf is she even saying!"

    • @hailpeachprincess1083
      @hailpeachprincess1083 4 года назад +2

      @LagiNaLangAko23 same po, 😂

  • @cheeseplease2832
    @cheeseplease2832 2 года назад +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.

  • @wizardglick9609
    @wizardglick9609 2 года назад

    Great Scott!!

  • @eat6270
    @eat6270 3 года назад +2385

    Everything was alright untill stela left the Earth 😵

    • @wildfire2835
      @wildfire2835 3 года назад +40

      She should never have left. lol 😂

    • @TacticusPrime
      @TacticusPrime 3 года назад +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 3 года назад

      :D

    • @bommtatak
      @bommtatak 2 года назад

      😂😂😂

    • @teodoirvanstaden
      @teodoirvanstaden 2 года назад

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

  • @turkeybowlwinkle4440
    @turkeybowlwinkle4440 3 года назад +3895

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

  • @mdv3435
    @mdv3435 2 года назад +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.

  • @magick333
    @magick333 2 года назад

    amazingly explained

  • @lunarmoon7636
    @lunarmoon7636 3 года назад +680

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

    • @Aeviu
      @Aeviu 3 года назад +35

      two*

    • @assiaisindegyara4905
      @assiaisindegyara4905 3 года назад +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 3 года назад

      Ikr

  • @sahilchouhan6459
    @sahilchouhan6459 4 года назад +2072

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

    • @weckar
      @weckar 3 года назад +80

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

    • @Ariadne4
      @Ariadne4 3 года назад +15

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

    • @joaosas
      @joaosas 3 года назад +42

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

    • @cocainebarbiee_
      @cocainebarbiee_ 3 года назад +4

      ON GOD 😂😂

    • @coffe1170
      @coffe1170 3 года назад +8

      Im like half asleep rn so it makes even less sense

  • @rauldurand
    @rauldurand Год назад

    Best explanation I found!

  • @helenfranks5784
    @helenfranks5784 2 года назад

    Love the choices of names

  • @aminathismail2501
    @aminathismail2501 4 года назад +1173

    “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.

  • @Nightcoffee365
    @Nightcoffee365 4 года назад +2068

    Wibbly wobbly timey wimey like.

    • @brookbouvier7749
      @brookbouvier7749 4 года назад +25

      David tennant just sneezed

    • @G.F.SF55
      @G.F.SF55 4 года назад +23

      Whovians are everywhere 👀, even in TED-ED

    • @randomwhovian1075
      @randomwhovian1075 4 года назад +5

      Allons-y Alonzo!!

    • @dta1801
      @dta1801 4 года назад +5

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

    • @cwu4591
      @cwu4591 4 года назад +6

      GERONEMOOOOOOOOOOOOOOOOOOOO

  • @gregdorfman1821
    @gregdorfman1821 5 месяцев назад

    This is best twin paradox explanation on youTube.

    • @zakelwe
      @zakelwe 4 месяца назад

      But it's wrong.

  • @Fightingsquidtattoos
    @Fightingsquidtattoos 2 года назад

    I can still never wrap my head around this concept.

  • @Pandastic_Dennis
    @Pandastic_Dennis 3 года назад +1864

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

    • @lExN34
      @lExN34 3 года назад +10

      Catastrophic error

    • @kenya24pie
      @kenya24pie 3 года назад +2

      🤣🤣🤣

    • @ohcool8314
      @ohcool8314 3 года назад +5

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

    • @Perririri
      @Perririri 3 года назад +1

      Normie

    • @--------352
      @--------352 3 года назад +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

  • @timetraveller4336
    @timetraveller4336 4 года назад +2431

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

    • @timetraveller4336
      @timetraveller4336 4 года назад +26

      @Manan Karnik it's from doctor who

    • @BusterDarcy
      @BusterDarcy 4 года назад +45

      Naw that’s just how British people really actually speak

    • @timetraveller4336
      @timetraveller4336 4 года назад +19

      @@BusterDarcy Indeed it is how we speak

    • @Lanna_M
      @Lanna_M 4 года назад +17

      Whovianssss

    • @kurobara6230
      @kurobara6230 4 года назад

      Where in the video?

  • @magicmjk09
    @magicmjk09 2 года назад

    A beautiful animation again.

  • @voidparadox3649
    @voidparadox3649 5 месяцев назад +1

    This is mindblowing

  • @filmfan4
    @filmfan4 4 года назад +1082

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

  • @kidpeligro7878
    @kidpeligro7878 4 года назад +657

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

    • @cessmaga5873
      @cessmaga5873 4 года назад

      Same

    • @noodboy4633
      @noodboy4633 4 года назад +3

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

    • @Tameinsight
      @Tameinsight 4 года назад +3

      too many distractions to think this one through

    • @maxthepaladin2147
      @maxthepaladin2147 4 года назад +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 4 года назад +2

      Nope, the video just didn’t explain it properly

  • @soulglory6696
    @soulglory6696 Месяц назад +1

    I continued watching simply for the animation.

  • @ashchoosespikachu
    @ashchoosespikachu 2 года назад

    Loved the doctor who reference at the end!

  • @gabrielam.7681
    @gabrielam.7681 4 года назад +1273

    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 4 года назад +94

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

    • @okas425
      @okas425 4 года назад +2

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

    • @gabrielam.7681
      @gabrielam.7681 4 года назад +8

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

    • @merikijiya13
      @merikijiya13 4 года назад +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 4 года назад +2

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

  • @theEXOaudio
    @theEXOaudio 4 года назад +583

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

  • @user-to6wg4uo2u
    @user-to6wg4uo2u 2 месяца назад

    Interesting theory video on time travel

  • @bodomguitar37
    @bodomguitar37 Год назад +1

    Me: I got everything.
    My brain: Are you sure about that?

  • @ekyasamahardika5253
    @ekyasamahardika5253 4 года назад +1528

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

  • @Noor-ib5hf
    @Noor-ib5hf 4 года назад +2335

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

    • @vandanaasthana1216
      @vandanaasthana1216 4 года назад +132

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

    • @Lord_Of_Night
      @Lord_Of_Night 4 года назад +53

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

    • @ni3070
      @ni3070 4 года назад +32

      @@Lord_Of_Night and how does that matter to you?

    • @Lord_Of_Night
      @Lord_Of_Night 4 года назад +18

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

    • @Andy-js5jy
      @Andy-js5jy 4 года назад +1

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

  • @Kageoni187
    @Kageoni187 2 года назад

    Love the Dr.Who reference!

  • @marianavarro4704
    @marianavarro4704 2 года назад

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

  • @loriwilliams5724
    @loriwilliams5724 4 года назад +559

    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 4 года назад +7

      Lori Williams I don’t get any of it.

    • @nurindahsaloka9491
      @nurindahsaloka9491 4 года назад

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

    • @adambaker4581
      @adambaker4581 4 года назад

      @@nurindahsaloka9491 i missed it what was it at😂

    • @nurindahsaloka9491
      @nurindahsaloka9491 4 года назад

      @@adambaker4581 123 😂

    • @mimica1314
      @mimica1314 4 года назад

      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

  • @aisleshic2721
    @aisleshic2721 4 года назад +510

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

    • @donkberg
      @donkberg 4 года назад +42

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

    • @ronweasley5347
      @ronweasley5347 4 года назад

      Lol hahahha

    • @viraj5079
      @viraj5079 3 года назад

      @@donkberg fascinating

  • @Gurseerat_Singh
    @Gurseerat_Singh Год назад +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 Год назад +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.

  • @01divine
    @01divine 2 года назад

    this is awesome

  • @suncooper2361
    @suncooper2361 3 года назад +1872

    Is no one going to mention the brilliant pun at the end of the video? "And as twins who are eleven years apart in age, they are a perfect example of a special relativity." This is so clever, because it both references the topic of the video, and the fact that Stella and Terra are twins, and thus, relatives. They're also special, because all twins are the same age, but they are not, making them one of a kind! That's why they are a special relativity! Omg this is so clever!

    • @omggom2488
      @omggom2488 3 года назад +147

      Go take an iq test or something damn

    • @ashik6419
      @ashik6419 3 года назад +26

      Ok, the video is better...

    • @hotaruxld3708
      @hotaruxld3708 3 года назад +18

      The.. what now???...

    • @RRC879
      @RRC879 3 года назад +122

      You caught a pun they didn't pitch.

    • @bryanrobidart6426
      @bryanrobidart6426 3 года назад +26

      Seriously, it blew my mind that it’s not only incredibly difficult to follow but then it’s also clever at the same time - yes, very cool and so cool of you to get that inference 👍

  • @misanthropologist.
    @misanthropologist. 3 года назад +1273

    is noone talking about how the fish died

  • @shuzennn
    @shuzennn 2 года назад +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.

  • @madsa1480
    @madsa1480 2 года назад +2

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

  • @sarahf662
    @sarahf662 4 года назад +427

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

    • @neisya5809
      @neisya5809 4 года назад +4

      finally someone noticed that!

    • @nitika3829
      @nitika3829 4 года назад +15

      The only thing I completely understood in the entire video

    • @pujakanhe8454
      @pujakanhe8454 4 года назад +2

      Smart you are!!!!!

    • @aasteroids1952
      @aasteroids1952 4 года назад +2

      this was the only thing thst made me feel smart in this video

    • @emanueleoliveira6557
      @emanueleoliveira6557 4 года назад +2

      Stella in my country is a beer

  • @JonnyRKR
    @JonnyRKR 3 года назад +1515

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

    • @kathrynmercier4874
      @kathrynmercier4874 2 года назад +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 Год назад +1

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

    • @craigape
      @craigape Год назад +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.

  • @Maosn1290
    @Maosn1290 2 года назад +4

    Ok, so if Stella recorded her journey on a video camera, then played the tape when she got back to earth, how long would the tape be?

    • @sesshoumarulover
      @sesshoumarulover 2 года назад +1

      I think 11.5 years since that's the time Stella experienced while she was in the ship, no?

  • @chrissy9153
    @chrissy9153 2 года назад

    I couldn’t imagine being away for that long

  • @sadiajavaid8717
    @sadiajavaid8717 4 года назад +793

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

  • @sarahmacleod2880
    @sarahmacleod2880 2 года назад +5368

    I see how this mathematically makes sense, but I don't understand why biological processes would slow down.

    • @rickramsey4134
      @rickramsey4134 2 года назад +1342

      Actually they don't, within their own time reference. It's not the biological processes themselves slowing down, it's time itself in their frame of reference. The video didn't really do a great job with that particular part, but it's a tough concept to wrap a mind around to begin with.

    • @NFITC1
      @NFITC1 2 года назад +342

      The closer you get to the speed of light, the more "time compresses". This is hypothetical and can't be tested in large with our current technology, but it has been observed that faster objects do experience a measurable time dilation. I personally suspect it has to do with the particles that make up individual atoms can't move as fast if the object is traveling closer to the speed of light so everything relatively moves slower.

    • @joepierson3859
      @joepierson3859 2 года назад +113

      @@NFITC1 No, that is not it at all. Your time slows down RELATIVE to other people's times. Right now there's a neutrino in space that's moving at .99999c from it's point-of-view you're time had almost stopped. From say the moon's point-of-view your time is going at full speed.

    • @joepierson3859
      @joepierson3859 2 года назад +59

      You can think of biological processes as a type of clock, so if a mechanical clock slows down so must a biological clock otherwise you can make a clock out of biological material

    • @P4boot
      @P4boot 2 года назад +40

      @@joepierson3859 So time is a physical quantity or stuff??? I always thought that it was processes that slowed down instead of time itself! We live in a bizarre reality!

  • @Apples15688
    @Apples15688 2 года назад +4

    The way I thought this was gonna be about why twins have telepathy lmfao

  • @potza2703
    @potza2703 2 года назад

    this animation is beautiful

  • @jameszhang1280
    @jameszhang1280 4 года назад +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 4 года назад +5

      That's the general outline of time travel

    • @jonathansauceda589
      @jonathansauceda589 4 года назад +12

      You can't go back tho
      depresso

    • @loosalat1244
      @loosalat1244 4 года назад +22

      thats basically the movie interstellar lol

    • @Lenoxuss
      @Lenoxuss 4 года назад +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_ 4 года назад +2

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

  • @madisonking8057
    @madisonking8057 4 года назад +209

    I like the names terra and stella, makes it easy to remember which is which.

    • @mandy2917
      @mandy2917 4 года назад +8

      Oh I just realized. Stella went into space and terra stayed on the ground. Huh. I found it super confusing cuz I couldn't keep track and kept forgetting which was which. But now that I see this it makes it so much easier to understand

  • @archive6094
    @archive6094 2 года назад +3

    God the concept of time is so fascinating

  • @al3xa723
    @al3xa723 2 года назад +1

    WHY IS NO ONE TALKING ABOUT THE DOCTOR WHO REFERENCE AT THE END??? "Wibbly Wobbly Timey Wimey Stuff"!!!

  • @bugayden2287
    @bugayden2287 4 года назад +865

    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 4 года назад +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 4 года назад

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

    • @IABITVpresents
      @IABITVpresents 4 года назад

      @@lued123 Does antimatter contain negative mass?

    • @IABITVpresents
      @IABITVpresents 4 года назад

      @@lued123 so why is antimatter anti?

  • @joroz9808
    @joroz9808 4 года назад +849

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

    • @kass4437
      @kass4437 4 года назад +50

      Jo Roz I love how I instantly got this reference

    • @keliswickland7936
      @keliswickland7936 4 года назад +46

      the good place fans unite :)

    • @raahimas2776
      @raahimas2776 4 года назад +18

      perfect example

    • @toxic-spammz1478
      @toxic-spammz1478 4 года назад +6

      What's chidi

    • @danielos666
      @danielos666 4 года назад +12

      this was the perfect reference, i just finished the last season today

  • @EetFuk8
    @EetFuk8 11 месяцев назад

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

  • @ttelan
    @ttelan Год назад

    love the names