Neil deGrasse Tyson Explains Gravity Trains

แชร์
ฝัง
  • เผยแพร่เมื่อ 10 ธ.ค. 2024

ความคิดเห็น • 905

  • @TheDwightMamba
    @TheDwightMamba 3 ปีที่แล้ว +475

    Chuck is becoming the smartest comic of all time through casual conversations.

    • @suncicastanojevic6012
      @suncicastanojevic6012 3 ปีที่แล้ว

      ❤️❤️❤️

    • @umbraxumbrax5268
      @umbraxumbrax5268 3 ปีที่แล้ว +15

      Chuck’s journey is great to watch.

    • @alexkang7360
      @alexkang7360 3 ปีที่แล้ว +13

      But has he tried dmt?

    • @TheDwightMamba
      @TheDwightMamba 3 ปีที่แล้ว +9

      @@alexkang7360 , he seems to already be an enlightened dude. But look what it did to Mike Tyson.

    • @melllvar4262
      @melllvar4262 3 ปีที่แล้ว +10

      His new name, Osmosis Chuck...

  • @dylanrogers9712
    @dylanrogers9712 3 ปีที่แล้ว +481

    “Chuck you ever get tired of these explainer videos? Because I could do this forever”
    Everyone: please do this forever

    • @CarlSAGAN.
      @CarlSAGAN. 3 ปีที่แล้ว +8

      We love to science forever ❤️

    • @subtitles1492
      @subtitles1492 3 ปีที่แล้ว +3

      👍🏻

    • @christobalgonzalez3529
      @christobalgonzalez3529 3 ปีที่แล้ว

      Watch this then you'll know Neil is lying
      th-cam.com/video/WAeBPskvP4Y/w-d-xo.html

    • @erikhendrickson59
      @erikhendrickson59 ปีที่แล้ว

      The wealth of knowledge preset on this channel alone, entirely for free, is hard to describe.

  • @fizyknaut8108
    @fizyknaut8108 3 ปีที่แล้ว +294

    Niel: "You tired of these explainers? I have unlimited."
    Chuck: "I'm gonna take you up on that."
    Everyone watching the video: "What he said."

    • @spookyninja4098
      @spookyninja4098 3 ปีที่แล้ว

      Hey Neil - still living in denial of the UFO evidence from the US military - a true scientist explores All the evidence

    • @tomking2613
      @tomking2613 3 ปีที่แล้ว +3

      i was about to say it, but you have seem to beet me. . . in this multiverse

    • @Li01018
      @Li01018 3 ปีที่แล้ว +1

      @@tomking2613 lol

    • @StaticBlaster
      @StaticBlaster 3 ปีที่แล้ว +1

      @@spookyninja4098 The U means unidentified. So, a UFO doesn't imply aliens or spaceships. You need to get your head out of conspiracy cuckoo land.

    • @spookyninja4098
      @spookyninja4098 3 ปีที่แล้ว

      @@StaticBlaster I guess you dont read the news buddy = The Pentagon confirms a video of a triangle UFO buzzing their destroyer is real - you were saying ? www.the-sun.com/news/2683726/us-navy-filmed-ufo-sky-video/

  • @justachillguyclips
    @justachillguyclips 3 ปีที่แล้ว +141

    Chuck and Neil just compliment each other so well

    • @Me-nq4gz
      @Me-nq4gz 3 ปีที่แล้ว +3

      Just compliment each other? Just? 😂

    • @ismailkaraoglan4316
      @ismailkaraoglan4316 3 ปีที่แล้ว +4

      Bromance is strong with these

    • @Robert_McGarry_Poems
      @Robert_McGarry_Poems 3 ปีที่แล้ว +2

      As a left hand clasping a right hand, a real chiral pair.

    • @stellanevis3107
      @stellanevis3107 3 ปีที่แล้ว +1

      Ditto. Their latest podcast was a party! Really amazing little gang, this two!

    • @irenegarbo7247
      @irenegarbo7247 3 ปีที่แล้ว +3

      It's complement, of course, but we get the picture! ; )

  • @tristanrocha4004
    @tristanrocha4004 3 ปีที่แล้ว +9

    Please never stop doing these. It hurts my soul to think about this star talk series stopping

  • @TheSecretTechniques
    @TheSecretTechniques 3 ปีที่แล้ว +54

    Oh... now I dig it!

  • @bullettube9863
    @bullettube9863 3 ปีที่แล้ว +46

    When I was in 8th grade I asked my teacher if I dug a hole straight down would I create a volcano. She said yes you would, now fill in the name of all 48 states on this map.

    • @subhojitdatta2792
      @subhojitdatta2792 3 ปีที่แล้ว +1

      @cops and govern ment are gangstalkers By applying science that is very advanced and can't be comprehended easily, The answer to your latter question is doppler effect ! By studying the incoming light of astronomical you can figure out the distance between them

  • @Josh-jj6qt
    @Josh-jj6qt 3 ปีที่แล้ว +40

    I'm really glad Neil cleared up the whole thing about gravity decreasing as you get closer to the centre as when I was younger, my teacher told me it would increase.

    • @ammo1317
      @ammo1317 3 ปีที่แล้ว +10

      The gravity doesn't change as you get closer. Rather the amount of planet pulling you in the same direction changes. So as you approach the center, less planet is pulling you towards the center and more is pulling you away from it. As you move away from the center more of the planet is pulling you towards the center and less is pulling you away. The closer to the center you go the higher the pressure will be, and gravity would also increase if the planet was made denser.

    • @marcomenahemi5270
      @marcomenahemi5270 3 ปีที่แล้ว

      Not only that, if you took Einstein’s equations and theory, how will spacetime curvature which is what gravity is, will be effected in a solid object like the earth?!

    • @Robert_McGarry_Poems
      @Robert_McGarry_Poems 3 ปีที่แล้ว +2

      Einstein: Well actually nothing is pulling on anything. You see, objects can only ever move in a straight line. It is actually space that is curved. Space/time is a framework for thinking about how mass warps space, and how mass moves through that curved space. Think of a rocket ship......

    • @marcomenahemi5270
      @marcomenahemi5270 3 ปีที่แล้ว

      @@Robert_McGarry_Poems exactly! What I’m wondering is how this space-time curve inside a planet? 🤔

    • @OscarssoN184
      @OscarssoN184 3 ปีที่แล้ว +2

      He's accually half wrong on that part, and your teacher is half right. This would be the case if the earth had a perfectly uniform density, but it doesn't. The core is much denser than the earth's mantle so the force would increase at the start. It not until you get to about the core's surface it starts decreasing.

  • @hecate9190
    @hecate9190 3 ปีที่แล้ว +31

    Neil and Chuck! You brighten my day and my mind! 💕

  • @juniorlara2394
    @juniorlara2394 3 ปีที่แล้ว +19

    Noooo we don't get bored of these explainers😭😭please go on forever neil😤anyone agree?z

  • @commenterperson4481
    @commenterperson4481 3 ปีที่แล้ว +2

    _0:11__ "I can do this forever"_
    OK, some really important passtime/random questions:
    - why do some goats have goatie?
    - why don't women have mustaches?
    - biology, chemistry, physics,... what do you think will be the next new major area of study in 100-300 year?
    - when humans/earthlings become multi-planetary species, what form of currency (if any) would you envision we'll have/use? (Or will be ideal/useful)?
    - which popular stereotype of you do you like the most, and which do you like the least?
    Finally, do you even read the comment sections?

    • @ThishVc-yp9xg
      @ThishVc-yp9xg ปีที่แล้ว

      This is Antarctic reality or an Desert reality?

  • @pranabdas7356
    @pranabdas7356 3 ปีที่แล้ว +7

    Chuk & Neil the best duo on the internet. I can watch this forever ❤️👍

  • @booperduper8816
    @booperduper8816 3 ปีที่แล้ว +3

    I love these explainers because they're short and i always learn something i never thought i wanted to know

  • @ogbreeze1081
    @ogbreeze1081 3 ปีที่แล้ว +3

    I go to sleep listening to you guys talk. It’s magical

  • @julianb1550
    @julianb1550 3 ปีที่แล้ว +5

    I always thought about this as a kid, that it would be an endless ride to jump down the hole and then have gravity "inverse" on you once past the center. Cool to have NDT explain it!

  • @tutegol
    @tutegol 3 ปีที่แล้ว +6

    PLEASE DO THIS KIND OF TALKS FOREVERRRRRR
    Thanks for shearing your knowleadge

    • @Robert_McGarry_Poems
      @Robert_McGarry_Poems 3 ปีที่แล้ว +3

      Oh no, that sounds painful... 😖

    • @dps3
      @dps3 3 ปีที่แล้ว +2

      @@Robert_McGarry_Poems XD

  • @davidmurphy563
    @davidmurphy563 3 ปีที่แล้ว +40

    Oh, I misread and thought they were explaining gravy trains. I've been looking for one of those for years....

    • @bens3509
      @bens3509 3 ปีที่แล้ว

      My old welding partner used to say he's getting on the gravy train before our shift. Never really got the reference

    • @Robert_McGarry_Poems
      @Robert_McGarry_Poems 3 ปีที่แล้ว +1

      @@bens3509 Gravy train = easy street.
      Work = security. Something about a bird in the hand and some bush or something. Moral of the story, don't let go of the bird. So, long story short... If you got a job, embrace the benefits it provides.

    • @bens3509
      @bens3509 3 ปีที่แล้ว

      @@Robert_McGarry_Poems awesome haha. Thank you for the insight!

    • @christobalgonzalez3529
      @christobalgonzalez3529 3 ปีที่แล้ว

      Watch this then you'll know Neil is lying
      th-cam.com/video/WAeBPskvP4Y/w-d-xo.html

    • @syedarmaghanhassan4652
      @syedarmaghanhassan4652 9 หลายเดือนก่อน

      Lol
      I've been waiting for it too.

  • @SamuelBuckleyScience
    @SamuelBuckleyScience 3 ปีที่แล้ว +25

    Your early to a star talk video, congratulations legend! ❤

  • @bmo4930
    @bmo4930 3 ปีที่แล้ว +1

    Dr Tyson mentioned that if we ignored air resistance, then it would take 45 mins to reach the other side. That would be incredible. This made me think however that if we dug such a hole and we had air resistance, if someone jumped into the hole, in case of a distance of 8000 miles, the travel time would take around 66 hours assuming a terminal velocity of 120 mph, right? Or am I mistaken?
    I love Startalk. I love Multiverse. Please don’t stop making these videos and please continue to teach and inspire us!

    • @fromnorway643
      @fromnorway643 3 ปีที่แล้ว +3

      You would *_never_* reach the other side if there was normal (sea level) air density and thus resistance all the way with a 200 km/h (~120 mph) terminal velocity.
      You would reach 200 km/h shortly after you jumped into the tunnel on one side and stay close to that speed until you were about halfway to the Earth's centre. There the gravity would start decreasing and you would start slowing down due to the air resistance now being stronger than gravity.
      Air resistance would also decrease as you slowed down, but so would gravity until reaching zero at the Earth's centre. If you had any speed left when reaching the centre and thus overshot it slightly, you would be stopped and pulled back by the now reversed gravity, and you would end up floating at the centre for ever.

  • @tuboid001
    @tuboid001 3 ปีที่แล้ว +42

    I'm pretty sure this form of travel is in the remake of Total Recall. They don't bother with Mars, they just travel through the earth from one part to another.

    • @rmarbertin8131
      @rmarbertin8131 3 ปีที่แล้ว +8

      And, it was on a track.
      Problem is, the deeper you go, the more massive the earthquakes are, and the tunnels created would act as crumple zones.

    • @witchdoctor6502
      @witchdoctor6502 3 ปีที่แล้ว +2

      my thoughts exactly :D total recall train is actually doable

    • @objectivemillennial2117
      @objectivemillennial2117 3 ปีที่แล้ว +5

      @@witchdoctor6502 no cuz the inside of the earth is 6000 degrees so it will melt literally any material

    • @bonibroco1076
      @bonibroco1076 3 ปีที่แล้ว +1

      It was called "The Fall"

    • @rabbitslayer42
      @rabbitslayer42 3 ปีที่แล้ว +1

      @@witchdoctor6502 Well, it is 2021 and we have only dug a 7ish mile hole into the Earth, so only 7,993 miles to go and we'll have the first one....if earth was 8K miles in diameter

  • @sept693
    @sept693 3 ปีที่แล้ว +2

    We need longer star talks with chuck. Chuck is legendary

  • @retromillenium
    @retromillenium 3 ปีที่แล้ว +3

    That's what made Man of Steel so cool. The Kryptonian World Engine was split between two points on the Earth diametrically opposite of one another. One was on the North East Coast of the continental U.S., Metropolis, and the other part was located in the Indian Ocean.

  • @e1123581321345589144
    @e1123581321345589144 3 ปีที่แล้ว +1

    5:11 no you don't cause you're forgetting about the atmosphere. you will reach terminal velocity quite fast and then you'll start to decelerate as the atmosphere gets thicker and thicker towards the center and with gravity accelerating you ever slower you'd stop quite close to the center and would need to climb back up. If you're not crushed by the now 6400km high column of air pressing on you from both sides.

  • @davidmurphy563
    @davidmurphy563 3 ปีที่แล้ว +23

    Unless you do it from pole to pole, you'll smack into the side because you'd retain the angular momentum from the spin of the earth. Maybe grease the sides.

    • @Zone1BC
      @Zone1BC 3 ปีที่แล้ว +5

      Except the earth (and thus the hole) continues rotating, so it would rotate with your lateral movement? No?

    • @theduder2617
      @theduder2617 3 ปีที่แล้ว +5

      Can't argue against that. Going from equator to equator would possess the greatest angular momentum, thus scraping your skin off on the side until reaching the center. After you pass the center, you can apply ointment to the wounds. lol

    • @steve-o6413
      @steve-o6413 3 ปีที่แล้ว

      @@Zone1BC the center rotation is faster, yes..?

    • @steve-o6413
      @steve-o6413 3 ปีที่แล้ว

      If you went pole to pole would that be Magnetic pole to pole or Axis pole to pole..? Wouldn't the Moons gravitational pull bang you up anyway lol...

    • @davidmurphy563
      @davidmurphy563 3 ปีที่แล้ว +4

      @@Zone1BC Absolutely, it does but by how much?
      Short answer: it's a normal to tangential axis coriolis effect application.
      In actual English: usually giving a rotation as an instantaneous velocity (eg 1000 mph at the equator) is a terrible idea but in this example it's actually helpful to keep things simple. So let's do that!
      Ok, you're on the equator doing 1000mph or thereabouts tangentially relative to the centre of the Earth in the direction of rotation at the precise moment you jump into the hole.
      The conservation of momentum / Newton's 1st means you retain your momentum. Only physics can have a law that says "do nothing, nothing happens" and see it as profound but there you go... We're ignoring friction here. Keep things simple.
      So, how fast are the walls moving? Let's take a point half way to the centre of the earth and so avoid calculus like the plague. That means the circle described at that point is smaller, the radius is smaller. But the rotational period is the same: 23 hrs 56 mins; one sidereal day*
      So, half way down the wall is taking the same time to cover less distance than you are from retaining your velocity. That means it's going tangentially slower than you. That means you smack your nose hard into the wall and scrape. :)
      The physics here is essentially the same as for why hurricanes rotate in different directions in the N and S hemispheres. As you move north from the equator, the radius reduces and so it's moving less distance but at the same period; 1 sidereal day. All we've done is shift axes.
      Hope that was mildly helpful. There's a little more to it than that but this is already long.
      *let me know if you'd like me to explain the 4 min difference to a solar day. Or try to work it out for yourself maybe. A little bit of thought and you can figure it out where the 4 mins went...

  • @axel955555
    @axel955555 3 ปีที่แล้ว +1

    That's why I watch every video! You read the title and it's like "hmm, whatever" but I think it's my favorite video so far :D

  • @sheiladikshit5110
    @sheiladikshit5110 3 ปีที่แล้ว +88

    nooOoOooOo! Don‘t stop the explainer videos! Neil and Chuck are pure gold, the 15 or so minute format‘s perfect!

    • @Jmartin_leo
      @Jmartin_leo 3 ปีที่แล้ว +1

      Really wish they would've continued on to ask what if the Gravity Train was applicable to the moon and how long it would've taken.

    • @christobalgonzalez3529
      @christobalgonzalez3529 3 ปีที่แล้ว

      Watch this then you'll know Neil is lying
      th-cam.com/video/WAeBPskvP4Y/w-d-xo.html

  • @jbchritz
    @jbchritz 3 ปีที่แล้ว +3

    Extra credit for the pop reference to C.H.U.D! Well done.

  • @jerrysanchez5453
    @jerrysanchez5453 3 ปีที่แล้ว +2

    I love the explainers.my favorite part of star talk

  • @nehalpal6924
    @nehalpal6924 3 ปีที่แล้ว +3

    please make one playlist just for the explainer videos! That would be a blessing!

  • @adarsh4764
    @adarsh4764 ปีที่แล้ว +1

    8:08 I couldn't control my laughter after Neil's reaction!🤣😂🤣😂🤣😂🤣😂🤣😂🤣😂

  • @pranavprabhakar9
    @pranavprabhakar9 3 ปีที่แล้ว +7

    Love how this turned out to be a serious topic 😅😅

  • @chrisvan9430
    @chrisvan9430 ปีที่แล้ว +1

    I know this was posted a year ago but,
    One thing I found interesting in this is as you get closer to the center, the less you weigh due to gravity, and the closer you get to the top of a mountain on the equator the less you weigh due to centrifugal force.

    • @ThishVc-yp9xg
      @ThishVc-yp9xg ปีที่แล้ว

      Let's just say.. You finally beat the equation, by being a supermen & say like, CHINA was the first men on earth, to win that G-train noble trophy!
      So, than finally, you think you got, all the equation finally counted through & taught that, I'm be like the first human to test that g-train & no equations is gonna stop you ( since you did all of it & was rest assured )
      Once, you're the first men, to finally " 0ne giant's leap for Humankind " sort of Go Go Spirit & suddenly you're realized, that when there we're no equation holding you back, you are stucked in the middle of center earth
      Not just, one nights but more than a months.. and crap, there is still an equation that's not right & R.i.P theory my men!

  • @ThoughtPhoenix
    @ThoughtPhoenix 3 ปีที่แล้ว +4

    One little skipped detail (ignoring the pressure and temperature at the center of the earth) is that once u reach the center u can no longer dig so for this to work u need to dig two holes on the exact opposite spots (antipodal points) and meet at the center.

    • @steve-o6413
      @steve-o6413 3 ปีที่แล้ว

      Interesting conundrum, but once you reach the center wouldn't you still have the second mass of the Earth pulling on you. Since we don't fully understand Gravity and its affect, but you make a great point...

  • @Zyrothy
    @Zyrothy 3 ปีที่แล้ว +1

    it's like a trip here in São Paulo - Brazil, if you're near a train station, you take 1 hour other places that have train stations near

  • @mysticxiiii
    @mysticxiiii 3 ปีที่แล้ว +5

    MORE EXPLAINERS MORE OFTEN NEIL!!! ❤

  • @ellerda1
    @ellerda1 3 ปีที่แล้ว +1

    They did this in the most recent Total Recall movie... awesome!

  • @morosis82
    @morosis82 3 ปีที่แล้ว +13

    That part about satellites taking the same time as a trip through the Earth was a mind-splosion.
    Loved it.

  • @johneonas6628
    @johneonas6628 3 ปีที่แล้ว +1

    Thanks Neil & Chuck.

  • @theHDRflightdeck
    @theHDRflightdeck 3 ปีที่แล้ว +4

    Side note. You would reach terminal velocity quite early assuming there is air in your hole and eventually get stuck at the center after oscillating a few times. Also you would keep hitting the walls due to the rotation of the earth. 👍🏻

    • @D__Cain
      @D__Cain 3 ปีที่แล้ว +2

      If I’m correct (and I could be wrong) you are already rotating with earth so you wouldn’t necessarily hit the “walls” of the hole because you’re rotating with it. But I’m no scientist so....

    • @steve-o6413
      @steve-o6413 3 ปีที่แล้ว +1

      @@D__Cain true, but as you near center rotation speeds up like a ice skater brings their arms into their body while doing a spin. I think this qualifies as accept for a few details as Neil explained...

    • @theHDRflightdeck
      @theHDRflightdeck 3 ปีที่แล้ว

      @@D__Cain only if you dig at the equator

    • @oxide9679
      @oxide9679 2 ปีที่แล้ว

      Terminal velocity is a result of wind resistance.
      That's why they said "Not factoring wind resistance."

  • @chibi7Sakura
    @chibi7Sakura 3 ปีที่แล้ว +1

    Great idea~ reminded me of the movie "The Core" when digging through the earth was mentioned.
    Would love to see more startalk in my lifetime~ cheers!

  • @TheCoolsacs
    @TheCoolsacs 3 ปีที่แล้ว +9

    I am sure Chuck is becoming more smart than he portrays. This dude understands advanced physics just by the 3 mins convo with Neil !!!

  • @Jalilhalman
    @Jalilhalman 3 ปีที่แล้ว +1

    Keep them coming Mr. Tyson!

  • @guillaume774
    @guillaume774 3 ปีที่แล้ว +12

    Neil: I could do this forever
    *Literally everyone*: 📝♾

  • @voxsideres
    @voxsideres 3 ปีที่แล้ว +1

    Best summary for Orbital Mechanics: Falling and Missing

  • @APartOfHistory
    @APartOfHistory 3 ปีที่แล้ว +10

    Wo!!! Neil you are literally a part of history!!

    • @STST
      @STST 3 ปีที่แล้ว +1

      Check this guys channel 👆👆👆

    • @MarkoMood
      @MarkoMood 3 ปีที่แล้ว +1

      Yeah I mean, we all are

  • @jonathanmoore467
    @jonathanmoore467 3 ปีที่แล้ว +2

    Pleaaase do them forever!! We’ll watch 😁

  • @davidt3956
    @davidt3956 3 ปีที่แล้ว +6

    The Morlocks? Nice. :)

  • @whereuwannabe7796
    @whereuwannabe7796 3 ปีที่แล้ว +1

    I clicked on this video to find out how to get on the gravy train. I didn't find that out but I did learn something.

  • @eagle___shadow
    @eagle___shadow 3 ปีที่แล้ว +3

    I love this channel ❤️

    • @heresthethingyouguys
      @heresthethingyouguys 3 ปีที่แล้ว +1

      The 2 TH-cam channels and watch the most right now are this one and Jersey Shore.

    • @CarlSAGAN.
      @CarlSAGAN. 3 ปีที่แล้ว

      Me too ♥

  • @landit
    @landit 3 ปีที่แล้ว +1

    I love your Explainer series.

  • @Phil8sheo
    @Phil8sheo 3 ปีที่แล้ว +5

    In Godzilla vs Kong they travel to the center of the Earth and it gets all kids of weird. I hope Neil and Chuck continue to do these videos for many years to come.

    • @knight-mares
      @knight-mares 3 ปีที่แล้ว

      Wasn’t necessarily the center. Inside, sure.

  • @jordanrivera1563
    @jordanrivera1563 3 ปีที่แล้ว +2

    im glad i clicked on this one really blew my mind. I hope one day i can meet NDT

  • @Leftyotism
    @Leftyotism 3 ปีที่แล้ว +9

    I was about to say what about air resistance, and then he mocked me with monsters xD

  • @nicolodeon3051
    @nicolodeon3051 3 ปีที่แล้ว +2

    All this digging reminded me of sandworms and the spice melange. Now I kinda wish they'd make an episode dedicated to Dune. 😊

  • @ManhattanCamerata
    @ManhattanCamerata 3 ปีที่แล้ว +3

    Who else read this as “Neil explains gravy trains”?

    • @martinloebig7089
      @martinloebig7089 9 หลายเดือนก่อน

      Yes!

    • @pogglywoggly3292
      @pogglywoggly3292 5 หลายเดือนก่อน

      It might be someone else but now I'm vaguely remembering someone doing an entire explainer or possibly the steep history of gravy boats (sauciere)

  • @brandonmicucci6610
    @brandonmicucci6610 2 หลายเดือนก่อน

    PLEASE DO THIS FOREVER DR. TYSON AND LORD NICE

  • @TheKaryotic
    @TheKaryotic 3 ปีที่แล้ว +9

    So if no one is there to catch you on the other side it’s an endless loop is that how we finally make a perpetual motion machine lol

    • @ojjuiceman
      @ojjuiceman 3 ปีที่แล้ว +2

      Yeah we have to figure out what to do about the pesky core

    • @baldellano2176
      @baldellano2176 3 ปีที่แล้ว +1

      @@ojjuiceman lets just blow it up and sell it.

    • @Playinz4kidz
      @Playinz4kidz 3 ปีที่แล้ว +1

      @@ojjuiceman pineapple corer like Neil said.....just a really big one I guess 😂😂😂

    • @Playinz4kidz
      @Playinz4kidz 3 ปีที่แล้ว +1

      @@baldellano2176 put it on eBay

    • @baldellano2176
      @baldellano2176 3 ปีที่แล้ว +1

      @@Playinz4kidz i'm sure someone will buy it

  • @greendragonreprised6885
    @greendragonreprised6885 3 ปีที่แล้ว +2

    So I'm literally typing a post about 'could we use this to link bases on the opposite sides of The Moon' when Neil goes and answers it. Awesome.

  • @jasonvegan5761
    @jasonvegan5761 3 ปีที่แล้ว +4

    Worth putting up with Chuck’s zingers to listen to the great NDT drop knowledge upon my dome.

    • @brianbarrett2487
      @brianbarrett2487 3 ปีที่แล้ว

      ...You mean sift through the pomp and grandeur of a talking wiki page to hear some jokes?

    • @theloganpresley
      @theloganpresley 3 ปีที่แล้ว

      @@brianbarrett2487 Pomp and grandeur? Why would you watch an NDT video if you didn't want to hear a talking wikipedia page? It's kind of his thing. That's like saying "who wants to sit through childish science experiments and easily digestible information??" while watching Bill Nye.

  • @katiakatia2380
    @katiakatia2380 3 ปีที่แล้ว +1

    Love you both and thank you 🙏Greetings from beautiful Poland❤️

  • @Cassaiuppa
    @Cassaiuppa 3 ปีที่แล้ว +1

    Yes Professor. Please continue doing such videos. I don't get bored at all..!!!

  • @00Skyfox
    @00Skyfox 3 ปีที่แล้ว +1

    One thing this thought experiment ignores is coriolis force. As you drop into the hole you'll still be carrying the rotational velocity around the Earth's axis due to the rotation of the planet that is faster than what the smaller radii from the Earth's center have. The whole way down you'd be bouncing off the walls on one side of the tunnel, and the whole way back up the other side you'd be bouncing off the opposite side of the tunnel. The only location that wouldn't have that would be a tunnel running from pole to pole.

  • @ryanlandriault9562
    @ryanlandriault9562 3 ปีที่แล้ว +1

    I love physics, it’s the way we make things work while dealing with gravity. Example; distribution of the weight for a load bearing wall of a house we only need to do this because of gravity.

  • @Cepheid_
    @Cepheid_ 3 ปีที่แล้ว

    3:21 I'm a physics major and the proofs of the gravitational shell theorems are beatiful. The geometric way it was explained was intuitive. Imagine a mass m, that is located inside a spherical shell that has a constant density. This shell exerts gravitational forces on the mass m. Without getting into the calculus, if the mass is closer to one side of the shell, feeling a gravitational force from that side of the shell, but the math works out that the opposite side of the shell produces the same force in the opposite directions canceling out the forces. This mean that m feels no net gravitational force.
    This remarkable phenomena depends crucially on the fact gravity follows an inverse square law. If gravity didn't have this inverse square law property, m would feel a non-zero net force.

  • @Duneswalker
    @Duneswalker 3 ปีที่แล้ว +1

    I 💕me some StarTalk. I think my favorite was "Warm Blankets." I sent that to a bunch of people I know and they thought I was nuts 🤣

  • @davidl.4888
    @davidl.4888 3 ปีที่แล้ว +1

    Mind Blown 💥

  • @MrBD81
    @MrBD81 3 ปีที่แล้ว +1

    Great topic! I would’ve never known it takes the same amount of time!

  • @dunning-kruger551
    @dunning-kruger551 3 ปีที่แล้ว +1

    I’m so happy Morlocks got a mention. I love The TimeMachine.

  • @psyonik1
    @psyonik1 3 ปีที่แล้ว +2

    I need to add one stipulation to this hypothetical journey through the Earth that was left out. The hole through Earth's center to the other side has to be a complete vacuum in order for such a free-fall to be possible. A hole with even 10% Sea level air pressure would create a resistive force (called fluid friction) that would slow the traveler down enough to prevent an exit at the other end (Newton's 3rd Law). As the traveler's velocity increased, so would to the force of friction against him or her. The traveler would lose enough kinetic energy to make unassisted escape impossible. Also, due to Earth's rotation, the hole would have to be curved or dug from pole to pole. A straight hole from any other point would certainly result in collision with the side of the shaft during transit.

  • @kflicted
    @kflicted 2 ปีที่แล้ว +1

  • @mbarrio
    @mbarrio 3 ปีที่แล้ว +1

    7:07 45min, so roughly half the period of the ISS
    edit: 8:00 he said it!

  • @morlasa
    @morlasa 3 ปีที่แล้ว +1

    You guys are both on point! Love these videos!

  • @TheEternalPheonix
    @TheEternalPheonix 3 ปีที่แล้ว +1

    I did the same thing when I was a kid but I live in Canada, not the states. So I determined I would come out in Australia.

  • @Dufie
    @Dufie 3 ปีที่แล้ว +1

    I'm a fan of both of yours.

  • @Blazical30
    @Blazical30 3 ปีที่แล้ว +2

    Was watching him live and then his explainer is fun

  • @namkyukimpark
    @namkyukimpark 3 ปีที่แล้ว +1

    Wow! Love these explainer videos!!!

  • @HenryLam54
    @HenryLam54 3 ปีที่แล้ว +1

    More explainer videos please :) I love these

  • @laughtermaster89
    @laughtermaster89 3 ปีที่แล้ว

    I love these! I want another one where you help us visualize how big space is. It blew my mind when you said that if the sun was the size of a period the next closest star would be 4 MILES AWAY! That was in the twinkling star episode. Mind blowing! I want more of that please! 😃

  • @eccomusic1386
    @eccomusic1386 3 ปีที่แล้ว +1

    I love you Neil and Chuck ❤️

  • @dominickdouglas5108
    @dominickdouglas5108 3 ปีที่แล้ว +1

    I love the explainer videos!

  • @dfvpinto
    @dfvpinto 3 ปีที่แล้ว +1

    I already learned so much with Neil and, of curse, Chuck. Thank you both, so much!.

  • @tuneboyz5634
    @tuneboyz5634 3 ปีที่แล้ว +1

    My favorite show ☺

  • @SlickTim9905
    @SlickTim9905 ปีที่แล้ว +1

    I just want to understand this. Does everything emit a form of gravity? Does that mean metals conduct magnetism and gravity at the same time? If gravity only comes from the planet's molten core? Can we reproduce the conditions and therefore make gravity? Does the moon, a cooler body, have less gravity? Is the measurement of gravity on earth accounting for the gravity from the sun? -- at some point you or an object would be aligned with both the earth and the sun, maybe even the moon. Lastly, is there something that repeals gravity?

  • @JesseMourinho
    @JesseMourinho 3 ปีที่แล้ว

    Neil you are great. Neil and Chuck you are both just superb!

  • @TheScottGillies
    @TheScottGillies 3 ปีที่แล้ว +1

    "That was the HOLE idea" @0:40

  • @Brotherbranflakes
    @Brotherbranflakes 3 ปีที่แล้ว

    We will never be sick of these video's.

  • @romyaakovyan8067
    @romyaakovyan8067 ปีที่แล้ว +2

    What about the angular momentum conservation? Wouldn't anything that pass through the hole be smashed on its walls?

  • @DaBlondDude
    @DaBlondDude 3 ปีที่แล้ว +1

    I read about a gravity train that delivers burritos from the east coast to New York; they leave frozen and the heat in transit cooks them.

    • @ThishVc-yp9xg
      @ThishVc-yp9xg ปีที่แล้ว

      Free transporter.. No Coke.. no diesel.. no sweat?

  • @tomkelly8827
    @tomkelly8827 3 ปีที่แล้ว +1

    There are actual gravity powered trains. They bring ore down from a mountain top and use the brakes to regenerate power for the return trip. Also in Britian they have a wire cable system like this too.

  • @mrpearson1230
    @mrpearson1230 3 ปีที่แล้ว +1

    Love Neil! Love Chuck! LOVE SCIENCE!!

  • @909sickle
    @909sickle 3 ปีที่แล้ว

    Neil you did it again, nice work

  • @jorgepeterbarton
    @jorgepeterbarton 3 ปีที่แล้ว +1

    I think if we are talking gravity trains, then it must be pronounced as in grAvy. GrAvity

  • @corm7538
    @corm7538 3 ปีที่แล้ว +1

    The movie I watched yesterday night, the 2012 reboot of Total Recall. It had this thing in the movie called, "The Fall" which was using real science. It was a gravity train that linked the U.K. aka the UFB in the movie with The Colony aka Australia. That could work that's if you could drill a hole though the Earth to link both places, which is a huge if but still cool IMO. It's funny how StarTalk released a video about this the day after I watched a movie that showed a gravity train as a main plot devise...

  • @zippyt.libertine3787
    @zippyt.libertine3787 3 ปีที่แล้ว +1

    Thank you Neil for taking the place left by the great Carl Sagan to so many of us. Astronomy is always fascinating with you.

  • @henryt1199
    @henryt1199 3 ปีที่แล้ว +1

    Great Channel, can be improved significantly by adding more animations/ diagrams with the explanations.

  • @japilander
    @japilander 3 ปีที่แล้ว +1

    Big fun from Chile here... Could you make explainer video about falling through the center of the earth but with the tunnel full of air? Considering pressure but not temperature

    • @japilander
      @japilander 3 ปีที่แล้ว

      You can make the analogy on falling through the atmosphere of Júpiter... "Gas planet"

  • @Robinators
    @Robinators 3 ปีที่แล้ว +1

    Need to rewatch Total Recall (2012)

  • @narutov7312
    @narutov7312 3 ปีที่แล้ว +1

    I exactly did this calculation for my Engineering Entrance exam and got the exact result! It's kind of oscillation concept

    • @ThishVc-yp9xg
      @ThishVc-yp9xg ปีที่แล้ว

      So, what did you forget to theory calculus?
      Approximately, 0.987 extra weight time's, every 1234 miles in towards the core creator?

  • @drnono8605
    @drnono8605 3 ปีที่แล้ว

    Never getting tired of them

  • @bobblues1158
    @bobblues1158 3 ปีที่แล้ว +1

    I became so depressed with the scene that I said "self" find Neil. And this came up and improved my mood!!!!