Why Doesn't the Earth Crash Into the Sun?
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- Опубликовано: 9 фев 2020
- The law of gravity says all things are attracted to each other, yet the earth does not crash into the Sun. Why? Learn the basics of how planets orbit the sun and why they don't crash into each other in this informative video.
This is part 3 in a five-episode series that is brought to you by award-winning teacher Jon Bergmann He creates these videos for his high school science students.
I watched it twice. The first time I watched, I kept wondering how good he is at mirror - writing.
It's not a mirror. It's transparent sheet.
Was wondering too! Software flips the image so he doesn’t actually write mirrored
Here is a video on how I create my videos - ruclips.net/video/wNnsU1e8uoM/видео.html
As informative as this was, is no one else impressed that Jon here is a Da Vinci level mirror-writer?
Or he’s right-handed and they mirrored the video?
@@truongsonbui5972yea..theres probably a glass (or computerised screen) in between him and the camera, and then they flip the image
I suspect a mirror reflection process.
I am right handed and there is a flip horizontal tool in premier pro that flips the image. I am not a Da Vinci :)
I know this is so cool!
Wow this did answer my question.
Is this the same as centrifugal force?
@@alqamahasnain6428 I’ll take it your being sarcastic. Lol hey I’ve came a long way in 3 years.
You're quite good mate.
Keep it up. We need someone like him to get enlightened.
I realize the earth is falling towards the sun and the earth has enough sideways momentum to keep it from falling into the sun. But isn't there trace atoms (in the void of space) that slows earth down due to resistance, which would cause the earth to, eventually, crash into the sun?
Jameel - I have often wondered that same thing. Not sure if that is the case - clearly we are still here so if there is space debris that is slowing us down, then it will take a very long time.
If the sun had infinite lifespan, and the earth had an infinite lifespan and they both dont crash into eachother , then would Einstein be incorrect? As space isn't being bent then, since if its being bent, it would eventually collide
@@JonBergmann1 Can I as a human do something to slow earth down and eventually end life one the only known planet in the vast vast universe?
Aside from the bending of space already having been proven, think of this video and see how the earth is falling in a circle once a year. Space is certainly being bent. Gravity is what causes the bending of space(time).
On a separate note, Einstein will for sure be proven wrong one day, since his theory of relativity does not hold up with Quantum Mechanics, at the microscopic level, so somewhere there is a gap that needs filling/adjusting.
@@ShreeRamFaujdar-gm3bj thankfully no :)
Great video!! Had a rough idea but your explanation allowed me to fully understand it. Love that see through board you were using as well, much prefer it to the thing khan academy uses.
Glad it was helpful!
Wow just awesome explanation. Finally understood.
Wow man this whole thing about gravity is just amaizing.Thanks for the simple explanation about a complex matter.
This one helped me so much, thanks
Great understandable theory, and use of known physics to achieve this. If we use any of the 3 laws of motion, what created this amount of force to accelerate any planet to achieve this equilibrium to constantly oppose the force of gravity of the sun? And how is conservation of " it's energy cannot be created nor destroyed"
There were really many things to learn from your lecture....and above all I want to understand the way black board was working....back to front ..... impressive
It looks like I'm left-handed. I am standing behind a glass board and then software flips it.
Thank you for full explaining
You are welcome
Jon thank you for explaining this. god bless you
Answered my question. Thanks!
Happy to help!
Wow... Cleared the concept 👍
You are so under rated sir , but you way of explaining is so good
Thanks a ton
Thanks for the explanation, now I know 😀
Wow..!! The point that the theory clicked my brain..made me smile so happy..im smiling like im high..
Great great explaination sir..
How cool is that!!
Its a tragic to the whole world that youre so underrated !!
This makes absolute sense!!
Thank you so much!
Wow.... your explanation is so nice.. funny yet explained so easily...Thank you..just subscribed.
what about curved space? You had a great chance to show this!
Curved space-time is what we call "gravity".
I had always wondered why it did not crash into the 🌞. You answered it with an explanation but now am hearing that slowly the moon is moving away from the Earth too? How is it so ? Is the Earth and other Planets losing their Gravity?
I might be wrong, but I think It means that initially moon was at the speed of moving away from earth. Gradually
That is a good initial explanation
Crazy stuff
I recently had the thought "why doesn't everything fall into a black hole? Then I thought - if you replaced the sun with a black hole that had an equal mass - then all the planets must then stay in orbit rather than be eaten by the black hole for the same reason we dont fall into the sun. While I understood that, I didn't necessarily know WHY. I figured it had to do with being trapped at a particular place as it falls towards the sun.
Very good explanation
Thank you sir 👏🏻👏🏻
Finally got the answer that makes sense.
Could you also explain whether this phenomenon is what's called centrifugal force? Because I've read that the centrifugal force prevents the earth from getting swallowed by the sun.
thanks for this! i now know!
Thank you sir for clear it to me
This video is awesome. I watched another video explaning gravity and they threw marbles around a heavy object in the middle and naturally it crashed into each other and my stupid self came up with this question but i realized earth velocity doesnt end like a marble cuz theres no air
Thank you bro
Amazing
Does gravity itself not slow things down? Like is the earths orbit getting ever so slightly closer to the sun, or is it at a set distance always (at a given point in orbit)?
It's kind of scary and weird to think of Earth (like any other orbiting object in our solar system) as continually *falling* towards the sun but also continually missing it thankfully lol
Yes, It's weird, because if there is a gravity acceleration towards the earth, it should fall to earth only day, because gravity pulling it in every seconds.
So why doesn’t mercury fall into the sun? Isn’t it much less denser than earth but closer to the sun?
@@cashisreal7566 I believe mercury solves the problem of being closer to the sun than earth by orbiting it *FASTER* than earth does hence its shorter orbital period or "year" of 88 days compared to earth's 365 days.
Coincidence
*I think not*
I was wondering than i said let me ask yt than i found this guy now i can go sleep
I thought he was drunk. Later realised that is his style. Good Explanation.
sir how earth got the orbit like satalite ? please explain.BTW your explanation is very good I had stuck to this question .😃
Oohhh my god!!! I haven't sleep for I week thinking about this,,, now he made me able to have a sweet dream 😅❤️
Thumbs up. I found my answer. After many videos . But I have an other question how and when this velocity was picked by earth and planets. How the planets got this balance
Bruh
This velocity was picked up by earth when the earth stopped growing more in mass like today .
Hi John, can you explain the area of outer space and the pressure in thats space. Can you also explain the area of earth's atmosphere and it's pressure in conjunction and connection to space. Thanks.
best explanation
hello sir i have an question.... everyone says because of centrifugal force sun gravitational force is balanced, but i am confused how these planets and stars got their tangential velocity which cause rotation instead of collision. As whenever we implant satellite we will take care of giving it a velocity so becoz of which it get fixed in a certain orbit.
It isn't centrifugal forces - the earth is simply falling towards the earth, but it has an initial velocity.
This graphic explanation is believed to enlighten many learners in understanding the basics of gravitational orbit.
Great explanation! thanks. best bit for me though...
"Spiral thing, errrm, im not sure we completely understand it all actually..... no one was there..."
competition for aethiests to argue .-.
Do you shoot the video then mirror it to get the words look right or do you actually write backwards on the fly with no imperfections? I find that impressive
Much simpler than you think. I shoot the video in front of a glass board and then the software horizontally flips the image. It appears that I am left-handed in the video. I am right-handed. Here is a video I made on how I make my videos - ruclips.net/video/wNnsU1e8uoM/видео.html
@@JonBergmann1 Hypotesis confirmed hahaha, great video BTW, im using your video it (general idea) on 7th grade, Osorno, Chile. Thanks
Sir, as there is nothing to slows down the moon... Do you think we can also say symmetrically the net forces will be cancel out as moon is following a sort of circular path.
This is a great explanation. But how is this reconciled by Albert Einstein theory of space time being indented and objects falling to larger bodies. Does space time and Newton's theory's allign?
They both agreed that objects are attracted to other more massive objects.They only had a different view on what makes these objects get attracted to one another.Newton-Gravity as a force; Einstein-curvature of space-time. So,both Einstein's and Newton's points of view can be applied here.
Sir the quak was awesome
God dam. Thanks man!
What I'd like to have explained is how the Earth and the other planets just happen to be going exactly the right speed to neither fall into the sun, nor fly away from it.
So if the matter in the planets coalesced, was there a change in velocity to establish the orbit?
Also why then do satellites eventually fall to the earth?
Satellites are on the outskirts of the earth's atmosphere so the air resistance slowly slows them down and eventually the spiral down and crash into the earth. But the sun's atmosphere does not at all interfere with the Earth (nor any other planet) becuase it is far away. Thanks for the great question.
It’s 1:45am and thinking about this question and it was keeping me up at night so I’m glad I found this video so now I can sleep lol
Oh, same case here. But it is 2:30 for me
I can only imagine if they ever find all the answers one day, it will mess them up like finding out how hotdogs are made. Crazy
Why earth or other planets do not stop orbiting? When we make a model of space time curve, the objects orbit around the heavier objects which is sun, so why they don’t stop orbiting at the end of finishing their orbit, I have heard that of everything starts, so they have to stop sometime in their way. But planets don’t stop orbiting forever.
Im curious to know if this is the case then why satellite uses thrusters to maintain its orbit and prevent to fall on the earth?
same idea. But since satellites are close to the earth there is some atmosphere there (gas) and this slows the satellites down which is why occasionally the thrusters have to be fired.
@@JonBergmann1 , first of all thank you for your explanation. I have had stupid anxiety almost every night for years and had wondered if earth will ever just throw itself out of orbit and slightly change its direction into the sun. And this video has helped a lot with that anxiety. But if you don’t mind me asking, why do we have our satellites still in the atmosphere of the earth since it would slow it down and pull more towards earth? And if that’s the case then does the sun have an atmosphere that actually reaches Earth?
Sir it is possible in case of satellites
But by kepler's law of planetry motion orbit of planets to the sun is eliptical so no centre force is being act
Reminds me of poppy saying how much she loves gravity
We all gonna ignore that this man is writing backwards so that it’s readable to us?
@Alex Natic
he is not writing backwards , he is writing just like a normal person, there are two ways to get a proper image
either a double glass membrane that reflects only laterally or a computer software that flips the image
@@abhinavatreya9178 Thanks, good to know.
does gravity affect the velocity of the orbit?
Isn’t it that the planets are formed at the equilibrium point such that the centrifugal forces matches the gravitational force? Of either one were out of whack, say the gravitational force weaker, planets would indeed flying away. No?
What could have caused the initial velocity of Earth to make it orbit in this way?
5:35 correction needed....it's more elliptical 😀
I saw this as the thumbnail has the Force formula
Sir, I have a question.
Why doesn't the velocity (speed) of a satellite changes when it's falling into the earth's centre.....umm I mean yeah it's orbiting the sun but why it's constant speed?
Why the gravity isn't effecting it's speed?
Nicely explained until I'll found a better answer👍
Have you find a better answer
Could the Earth body's trajectory shift to a dangerous degree so that eventually it would go too far or too close to the Sun and thus, be either engulfed by the Star or our life exterminated (too cold or hot)?
I have in mind an event of a magnitude capable of moving the Planet.
♥️♥️♥️ you rocks 👌👌👌👌👌👌😘😘😘😘
If the gravitational pull of the sun is just strong enough to hold the earth in its orbit, never letting it drift away and never pulling it closer and eventually crashes into it. Then what about the other planets that are closer and farther away from it. How does gravity work for them. Basically the same way I'm guessing but shouldn't the gravity be stronger for nearer planets and weaker for farther planets.
Ave been asking myself the same question...more research needs to be done...seems Newton argument about gravity isn't enough
Planets that are closer have more velocity, so they orbit the Sun faster, while planets that are farther orbit the Sun slower. There has to be an equilibrium point I guess where the velocity is just right where if it was slower the planet would eventually fall into the Sun, or if it was faster it would eventually drift away and leave the solar system.
Also the sun is way bigger than earth and should overpower the earth's ability to have equal pull.
The space near sun is curved so keeps the earth gravity in orbit around
What i learnt is: All a big super scary movie villan needs to do is just turn the direction of earth's velocity slightly (against tangent of the earth but towards sun) so it'll fall into sun eventually. Correct me if I am wrong.
that would be a super villan things for sure
What so we just happened to have the perfect conditions set to keep our orbit and we don't know how?
With everything moving in space due to their respective initial velocities and the expansion of spacetime, one would think the actual physics equations of planetary motion are much more complicated. Is this true?
not really. But how they interact with many different bodies is - but the equations are relatively simple
@JonBergmann1 Cool. Thanks for the explanation...we don't really need more than F = GMm/r^2 to calculate planetary rotation. Movement of spacetime can ve ignored.
I thought earth is trying to escape outwards and the sun is pulling inwards, therefore it sort of nullifies itself staying in the same orbit around the sun.
What about something big hits the moon? Path of moon will change right?
it's like watching Mr Beans explaining all of these LOL! pretty cool.
WTF, i didn't know the answer was this simple.
So out there in space since we don't have any air but each of planets have their own gravitation force like Jupiter which stops most of the asteroid to hit the eart because of its gravitation pull....so my question still the same sun has a larger mass so has larger gravitation pull so why isn't it pulling any other planets. Just like Jupiter binding the asteroid to move around its belt
Im curious as to how earth got that initial velocity, and also what is the energy used to maintain that velocity
You don't need energy to maintain constant velocity in a vacuum, remember. It will travel on forever. You only require a force to change the acceleration
Could it be that the planets magnetic fields keeping the planets in their orbit. So the mass of the sun or planets pulls in moons and planets to them but the sun's and planets magnetic fields radiating out keep them in their orbit. Is it not odd that Venus and Mars with no magnetic fields have no moons orbiting them. Just my amateur theory. Would love to see proper mathematical model to see if true.
How does the earth gain velocity in a particular direction parallel to the sun? Why not away from the sun?
but this is newtonian gravity right? what about gravity from general relativity?
same doubt bro
silly question if i am allowed to ask...🙈 from where the earth gets the velocity.
From the Big Bang.The Earth was formed from much smaller pieces of rock which were already moving fast due to the energy emitted from the BB.Please google your question ,I'm sure you'll find a more complex answer.
Same is my question.
Doesn't explain my question at all. Please clear my confusion.
Q : Why planets doesn't fall into sun ?
A: planet is moving too fast
Q: why it doesn't get free from gravity of sun and gets free in Cosmos?
A: sun gravity is too strong. It doesn't allow escape.
Ok. But my question is why or how it's(planet) moving in first place ?? To move an object requires energy. . Why is planet moving so fast, and your answer is ,if it slows it will fall into sun. . where is energy coming from ,for this sustainable system ?? Where are planets getting energy from to continue moving so fast?? Sun attracts and bends path while planet is moving ? But something , some energy source has to move the planet or satellite or object in first place. Where is that energy coming from in this sustainable system ????
Dear anant please let me know answer too, if you find one.
The energy which caused the Earth to move is,as I said in my previous reply, from the Big Bang explosion. When it orbits, Sun's gravity is "consumed" by keeping the planet from "getting away" ,rather than by attracting it. In the Universe there is no atmosphere which causes things to slow down like here on Earth. If you were in Space and threw a ball, it will not stop (unless it gets close to a massive object like a planet,star etc.).Likewise,if you were the Big Bang and threw Earth, it will not stop, it will eventually get into the orbit of Sun. Sun's gravity is used so Earth stays on its orbit and not travel further and is "consumed" that way.The Sun cannot therefore bring the Earth closer to itself unless its gravity force increses.
And how did we measure that "automatic spiral Big Bang unkown upward Velocity" to confirm the well known gravity equation?
Hey sir but energy is needed for anything to move but where does this energy come to planets to move ?
Please answer
Question from India
newtons 1st law - once an object is in motion it stays in motion. so once the planets are in motion they stay in motion. The only force acting on them is the gravity of the sun. Since they are "flying" through space which is a vacuum, they dont slow down.
@@JonBergmann1 but sir why did they started moving
What made them move
@@Devenderkumar-nq5ro Maybe the big bang
@@Devenderkumar-nq5ro read about Origin of solar system. That will give an Idea.
If big bang is real and it started from I point then why did it not became a black hole large mass small size and also as matter can nither be created nor be destroyed then it all had to come from one point
Does the sun also rotate on its axis?
What powers the earth rotation on its axis its been 4 billion years.
Earth's speed V is just a fixed speed, not an acceleration, while the Sun's gravity is an acceleration (G). I thought that the Earth is falling into the Sun, but it's taking billion years to do so (or the opposite) because of the almost perfect balance between V and G. I would like an answer to this in simple terms if possible
Sir please help me with this Light Board
I shall be highly thankful to you
Im not sure but he should be standing behind a glass wall. and he is writing inverted. which is pretty impressive.
so.
guy |glass wall| camera
update: hes behind a glass wall and writing normaly... then he edits the video inverted
Thanks :)
So if we were to launch enough "projectiles" at the moon in order to slow it down significantly, it would crash into the earth?
Sir It's a good answer but still I think why what could it be something that is super complicated
The satelites have engines that turn on in order to adjust the velocity to keep in orbit. how does the earth "correct" its speed in order to keep around the sun? if the explanation that there is no atmosphere to make it slow down, then the satelites wouldnt need to corret their speed too...what im missing?
That is a really great question. Though I am not 100% certain - I would say that the satellites are facing at least some atmosphere - so over time they slow down - thus the need for the engines. In the case of the earth, it doesn't have to fight a solar atmosphere so it keeps on orbiting.
@@JonBergmann1 cheers. I was thinking on that as well. I wasn't sure if the satellites face some resistência by not being that high. It makes sense :)
Then how did earth get it's velocity? Like was it just moving into vaccum and suddenly sun's gravity attracted sun and stopped it's straight trajectory?
The sun space is curved so it's causes the earth to rotate inward
Wouldn't there be an energy loss in the ball's example
Did anyone notice that he is writing mirror image on that glass
Can you plz explain from the perspective of Einstein General Theory of Relativity...I know Moon follow a Geodesic in an Inertial motion due to Curved SpaceTime but Why Doesn't Moon Fall into the Earth's surface?(plz don't give answer from Newton perspective)
So it the mmon always falling toward Earth?
Next lesson: Why water is actually wet?
5:22 I’m not sure we can really understand it honestly, because no one was there. - Jon Bergmann, 2021
We have nothing to worry about unless the first 2 planets fall first then it's time to freak out y'all 😄
Don’t orbits decay? I thought that’s why we needed thrusters. Seems like the same thing would be happening to the earth in some tiny way.
great question - I have wondered about that as well. This is what I found when searching the net - and this seems reasonable to me.... That doesn't quite answer the question though- does Earth experience slowing of its orbit because of contact with the Sun's 'atmosphere'. The short answer is no- the sun is so far away and the Earth is so heavy that any force is very very small and any acceleration is far smaller! In fact, if the orbit started to decay, the radiation pressure of all of the light from the sun would increase, which would act to limit the rate of decay. So overall- probably not.
Answered by: Michael Inkson, Physics Undergrad-to-be, Cambridge, England
Remembering Newton's Laws of Motion will help understand this, a body will remain at rest or in a state of uniform motion unless acted upon by force. Satellite orbits decay because their mass is relatively small and so little force is required to change their velocity and bring about orbital decay. The Earth has very large mass and is unlikely to encounter sufficient force to slow its motion. The Earth should remain safely in orbit until the Sun becomes a red giant and absorbs it.