@@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/
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.
@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
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.
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.
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?!
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......
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.
@@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.
_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?
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.
@@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
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!
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.
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
@@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...
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.
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.
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.
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...
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.
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!
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.
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. 👍🏻
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....
@@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...
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!
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.
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.
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.
@@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.
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?
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.
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.
Just to add in, what if you were carrying a light on your way as well can you observe someone failing completely through the hole? They'd have to jump in true to the center of the hole but that isnt what stars do that we have going into black holes. So if you had a light and no light was shining from the other side because no one is there and you jumped in from the side of the hole, could I see you sort of orbit into the center or will you fall so fast and get out on the side before I can see the light escape from behind you? Hopefully I asked the right questions! Thanks neil
"I look up at the night sky and I know that we are part of this universe. We are in this universe. But perhaps more importantly than both of these facts is that the universe is in us." - my man, Neil Degrasse Tyson.
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.
I guess this could have been a myth but wasn't there something called terminal velocity or maybe it was maximum velocity, where you had a max limit on how fast you could be falling? Or does that have more to do with air resistance? Because iirc it's a limit you reach pretty quickly.
If you jumped into the hole, you would be falling down, but once you reach the center, wouldn't you then be falling up? Because from your point of view, you would still be falling, but going in the other direction. Which would now be up.
Don't you need to cancel out your side ways velocity when going through the hole? You're traveling, on the surface of the Earth, between 0 and 1650 km/h. But the deeper you get, the slower that part of Earth turns. So even before you get anywhere near the center, let alone the other side, you've hit the side of the hole.
![เป็นไปได้ไหม - WanMai [Official MV]](http://i.ytimg.com/vi/_6lZ6b3_7Vo/mqdefault.jpg)
Chuck is becoming the smartest comic of all time through casual conversations.
❤️❤️❤️
Chuck’s journey is great to watch.
But has he tried dmt?
@@alexkang7360 , he seems to already be an enlightened dude. But look what it did to Mike Tyson.
His new name, Osmosis Chuck...
“Chuck you ever get tired of these explainer videos? Because I could do this forever”
Everyone: please do this forever
We love to science forever ❤️
👍🏻
Watch this then you'll know Neil is lying
th-cam.com/video/WAeBPskvP4Y/w-d-xo.html
The wealth of knowledge preset on this channel alone, entirely for free, is hard to describe.
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."
Hey Neil - still living in denial of the UFO evidence from the US military - a true scientist explores All the evidence
i was about to say it, but you have seem to beet me. . . in this multiverse
@@tomking2613 lol
@@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.
@@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/
Chuck and Neil just compliment each other so well
Just compliment each other? Just? 😂
Bromance is strong with these
As a left hand clasping a right hand, a real chiral pair.
Ditto. Their latest podcast was a party! Really amazing little gang, this two!
It's complement, of course, but we get the picture! ; )
Please never stop doing these. It hurts my soul to think about this star talk series stopping
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.
@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
Oh... now I dig it!
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.
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.
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?!
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......
@@Robert_McGarry_Poems exactly! What I’m wondering is how this space-time curve inside a planet? 🤔
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.
Neil and Chuck! You brighten my day and my mind! 💕
Oh, I misread and thought they were explaining gravy trains. I've been looking for one of those for years....
My old welding partner used to say he's getting on the gravy train before our shift. Never really got the reference
@@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.
@@Robert_McGarry_Poems awesome haha. Thank you for the insight!
Watch this then you'll know Neil is lying
th-cam.com/video/WAeBPskvP4Y/w-d-xo.html
Lol
I've been waiting for it too.
_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?
This is Antarctic reality or an Desert reality?
I go to sleep listening to you guys talk. It’s magical
8:08 I couldn't control my laughter after Neil's reaction!🤣😂🤣😂🤣😂🤣😂🤣😂🤣😂
Chuk & Neil the best duo on the internet. I can watch this forever ❤️👍
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.
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.
my thoughts exactly :D total recall train is actually doable
@@witchdoctor6502 no cuz the inside of the earth is 6000 degrees so it will melt literally any material
It was called "The Fall"
@@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
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!
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.
Except the earth (and thus the hole) continues rotating, so it would rotate with your lateral movement? No?
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
@@Zone1BC the center rotation is faster, yes..?
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...
@@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...
I love the explainers.my favorite part of star talk
I love these explainers because they're short and i always learn something i never thought i wanted to know
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.
Noooo we don't get bored of these explainers😭😭please go on forever neil😤anyone agree?z
Thanks Neil & Chuck.
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.
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.
nooOoOooOo! Don‘t stop the explainer videos! Neil and Chuck are pure gold, the 15 or so minute format‘s perfect!
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.
Watch this then you'll know Neil is lying
th-cam.com/video/WAeBPskvP4Y/w-d-xo.html
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.
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...
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.
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!
PLEASE DO THIS KIND OF TALKS FOREVERRRRRR
Thanks for shearing your knowleadge
Oh no, that sounds painful... 😖
@@Robert_McGarry_Poems XD
We need longer star talks with chuck. Chuck is legendary
Extra credit for the pop reference to C.H.U.D! Well done.
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
Your early to a star talk video, congratulations legend! ❤
Yup!
Absolute Legends!
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.
Love how this turned out to be a serious topic 😅😅
Keep them coming Mr. Tyson!
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. 👍🏻
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....
@@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...
@@D__Cain only if you dig at the equator
Terminal velocity is a result of wind resistance.
That's why they said "Not factoring wind resistance."
They did this in the most recent Total Recall movie... awesome!
MORE EXPLAINERS MORE OFTEN NEIL!!! ❤
Mind Blown 💥
Who else read this as “Neil explains gravy trains”?
Yes!
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)
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!
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.
I am sure Chuck is becoming more smart than he portrays. This dude understands advanced physics just by the 3 mins convo with Neil !!!
Best summary for Orbital Mechanics: Falling and Missing
That part about satellites taking the same time as a trip through the Earth was a mind-splosion.
Loved it.
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
The Morlocks? Nice. :)
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.
Wo!!! Neil you are literally a part of history!!
Check this guys channel 👆👆👆
Yeah I mean, we all are
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.
I was about to say what about air resistance, and then he mocked me with monsters xD
I'm a fan of both of yours.
Neil: I could do this forever
*Literally everyone*: 📝♾
My favorite show ☺
I love this channel ❤️
The 2 TH-cam channels and watch the most right now are this one and Jersey Shore.
Me too ♥
7:07 45min, so roughly half the period of the ISS
edit: 8:00 he said it!
please make one playlist just for the explainer videos! That would be a blessing!
"That was the HOLE idea" @0:40
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.
Wasn’t necessarily the center. Inside, sure.
What about the angular momentum conservation? Wouldn't anything that pass through the hole be smashed on its walls?
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
Yeah we have to figure out what to do about the pesky core
@@ojjuiceman lets just blow it up and sell it.
@@ojjuiceman pineapple corer like Neil said.....just a really big one I guess 😂😂😂
@@baldellano2176 put it on eBay
@@Playinz4kidz i'm sure someone will buy it
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.
Worth putting up with Chuck’s zingers to listen to the great NDT drop knowledge upon my dome.
...You mean sift through the pomp and grandeur of a talking wiki page to hear some jokes?
@@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.
im glad i clicked on this one really blew my mind. I hope one day i can meet NDT
I love your Explainer series.
I’m so happy Morlocks got a mention. I love The TimeMachine.
6:52 my instinct told me "43 minutes" but he says it os 45 minutes... I will go with my instinct on this one...
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!
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?
Pleaaase do them forever!! We’ll watch 😁
All this digging reminded me of sandworms and the spice melange. Now I kinda wish they'd make an episode dedicated to Dune. 😊
Keep your hands inside the gravity train all the time and do not feed the creature and monsters please and thank for your collaboration.
Chuck: *Ooooo Snap!!*
Neil: *Ahhhh Snap!* No, Z Snap!
Love you both and thank you 🙏Greetings from beautiful Poland❤️
Wow! Love these explainer videos!!!
Whats the shortest distance on earth were we could make a gravity elevator?
I love you Neil and Chuck ❤️
Great topic! I would’ve never known it takes the same amount of time!
Chuck now has a PhD through the explainers
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.
Need to rewatch Total Recall (2012)
Total TransportteL
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.
Just to add in, what if you were carrying a light on your way as well can you observe someone failing completely through the hole? They'd have to jump in true to the center of the hole but that isnt what stars do that we have going into black holes. So if you had a light and no light was shining from the other side because no one is there and you jumped in from the side of the hole, could I see you sort of orbit into the center or will you fall so fast and get out on the side before I can see the light escape from behind you? Hopefully I asked the right questions! Thanks neil
"I look up at the night sky and I know that we are part of this universe. We are in this universe. But perhaps more importantly than both of these facts is that the universe is in us." - my man, Neil Degrasse Tyson.
Was watching him live and then his explainer is fun
Same
I love the explainer videos!
So at the end of the hole, you need someone to catch your hand, right?
WRONG!
You need someone to catch your foot :D
After passing the center point of the earth you would be effectively digging a hole straight up.
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.
Yes Professor. Please continue doing such videos. I don't get bored at all..!!!
I guess this could have been a myth but wasn't there something called terminal velocity or maybe it was maximum velocity, where you had a max limit on how fast you could be falling? Or does that have more to do with air resistance? Because iirc it's a limit you reach pretty quickly.
If you jumped into the hole, you would be falling down, but once you reach the center, wouldn't you then be falling up? Because from your point of view, you would still be falling, but going in the other direction. Which would now be up.
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 🤣
PLEASE DO THIS FOREVER DR. TYSON AND LORD NICE
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.
Free transporter.. No Coke.. no diesel.. no sweat?
I would use it just to grab a snack from the other side and fall back home
Great video. Wow too many comments. I'd like to ask, does the earths rotation affect this hole trip?
Don't you need to cancel out your side ways velocity when going through the hole? You're traveling, on the surface of the Earth, between 0 and 1650 km/h. But the deeper you get, the slower that part of Earth turns. So even before you get anywhere near the center, let alone the other side, you've hit the side of the hole.
You guys are both on point! Love these videos!
For a moment there I thought this was just going to another of those yoyo diet plans