Neil deGrasse Tyson Explains The Equivalence Principle

[@StarTalk]

See if you can get the equivalence principle experiment to work at home. What happens?

[@jarnailsinghbhullar417]

Mama Earth says, " *come back FU..KER* "..😂😂!!

[@Earnest.M]

fell. towards earth

[@North_Lights]

Neil, talking about misnomer, I can argue zero gravity is also a misnomer. Because it is equivalencies principle and relativity after all. You never in zero gravity, the gravitational force of earth is equally opposed by the acceleration of your space vehicle or body towards and around the earth, thus you feel this apparent zero gravity in the orbit. And by the way, you don't need to go to space for that, you can feel that in the same 737 if it accelerates equally but opposite to earth gravitational force. Oh, you can say floating on water is no different, the gravitational force of the earth is opposed by the water surface tension if you are those tiny insects, or buoyant force, which is nothing but water molecules rush towards all direction. You may argue, floating on water is just like standing on land, Duh, the land is equally oppose you with same force. After all it is relativity you know. My point is, you are playing with words and accusing others of ignorant. What you are doing is called, logomachy.

[@chantelecarpenter7768]

Who you talkin' bout. Haha

[@inertiaforce7846]

Please make a video explaining why free fall is the only state that's inertial, and therefore that standing on the earth is a state of acceleration.

[@michaelccopelandsr7120]

Neil and Chuck for 2024

[@st.peterunner8758]

If only that was possible. We’re stuck with octogenarian white dudes

[@HaroldKuilman]

Just Neil please 😅 🙏

[@vinnybrich484]

Nah I want Chuck and Neil

[@linyenchin6773]

​@@HaroldKuilmanChuck is superior as a Human as he is more intelligent than intellectual aka worthless. Tyson is sometimes too intellectual to realize he isn't being Human but combative and vindictive like mama.

[@FracturedReality]

They both work together well their pleasing the nerds and average Joe, I still find myself not worthy of being in their presence 😁

[@Hemzees]

I love how science just makes these two happy. Chuck is especially brilliant but then most comedians actually are.

[@Jager-er4vc]

I love Chuck for his comedy and the fact that he is WAY smarter then he lets on.

[@joshuagharis9017]

Chuck is definitely intelligent 👌, he's curious too 😊

[@quinnjackson731]

True. He's the class clown that the teacher wouldn't mind having.

[@mjdurham8]

my thoughts exactly

[@Capt.Alron.D]

Being funny requires a person to be intelligent. We take comedians to be silly at times but they are the ones outsmarting us and thinking of something mostly spontaneously, which makes us giggle!

[@erinncarl9294]

​@@Capt.Alron.DAbsolutely!!

[@jeffs6090]

Thank you for finally mentioning The Expanse. It's such an amazing show that actually got a lot of the science correct. Obviously some things were embellished for drama and artistic reasons, but many things were spot on. Especially their ship designs in order to generate artificial gravity when the engines are on. Half way to their destination, the ship would flip so the rockets were then slowing them down while still generating gravity. Good on Chuck for mentioning that at the end! They should definitely do an explainer about the show and all its science. First, though, Neil needs to watch all the seasons!! Beltalowda!

[@diegofernandez4789]

Remember that guy Epstein dying from the acceleration of his own invention? The Expanse did a lot of things right. Damn I miss that series.

[@cleanthe3276]

@@diegofernandez4789 The longest funerals ever ! :)

[@michaelharris680]

Beltalowda❤

[@kendrick_ukc]

​​@@michaelharris680❤ milowda inyolawda

[@georgedeedsnotwords2162]

I wish I could have gotten teachers like them back in school . The passion and fun , I might have even liked being there and learning .

[@evrettej]

Right!!!! I would have loved science class if Neil was our teacher or professor

[@DrDeuteron]

if you need a good teacher to love science, than you really only like science.

[@sicfxmusic]

You're asking scientists to be your teachers, ain't nobody got time for that😂

[@tonyping3159]

For sure. They would have the struggling students excited to learn and pass their tests.

[@georgedeedsnotwords2162]

@@tonyping3159 their enthusiasm would show through and spark interest in young minds . The teachers I had were to obvious that it was a paycheck and they didn't care about only one student at a time . The richest family or smartest student . Wouldn't waist there time to help a struggling or poor sole , nothing in it for them .

[@PerfectChaos7]

I'm glad they gave another shout out to The Expanse. An amazing story, and even better for science lovers. I've seen all 6 seasons in continuum 5 times now and also read all 9 books, and planning to re-read them soon.

[@Loan--Wolf]

when i get the funds i plan to get them i loved the show and want way more lol

[@user-et1ht9fx2k]

You guys always manage to put a smile on my face even when times are tough. And I learn something too. Thanks for that.👍

[@StarTalk]

That's everything we strive for, thanks for your feedback :)

[@michael-4k4000]

A put some pudding in my belly 😋

[@TamTran-vw7zm]

Thanks, guys, for letting me relive my college physics class (looong time ago). I love your shows, and the pure joy of learning you show, and then give to me!

[@Loan--Wolf]

Niel looks like he gets angry when he is teaching lol

[@StarTalk]

Never lose your interest in physics!

[@martinntuwa]

I love that The Expanse is recognized. It's the best space novellas I've ever seen and read.

[@dylanroberts1752]

I can't stop the video until I hear Neil say, "keep looking up". ❤😊

[@kevinfletcher1999]

I tried that. Kept walking into lampposts. 😂😂😂

[@thewinddb]

Neil gets so amped up talking about physics. I enjoy that.

[@riftvideos1203]

6:45ish I thought we used G as a term express equivalency to earth gravity for the difference in inertia in relation to two objects. ie in a fighter jet, you experience at 4g your 150lb body as if your 600lb, but you aren't being pulled toward the plane's mass. the plane is just adding to your inertia in a particular direction. if the plane had a gravitational effect on you then in a negative 4g maneuver the same person would have an outsized pull of the plane toward your mass. your body is not pulling that plane toward it, the plane is increasing the difference in inertia as the heavy plane radically alters your inertial vector dragging you along.

[@sherrynight]

We should make StarTalk mandatory in all schools, teaching curriculum, and in the education system! 💛✨

[@wrestlenewsnetwork5564]

Shhhh.... you'll upset the Christians.

[@JamesCAlien]

50% ?

[@gazzam3172]

@@wrestlenewsnetwork5564 do we have any Lions?

[@toddfraser3353]

Now to get the kids to listen. I had pleanty of good teachers, but a lot of the classes, I was focused on the cute girls in the seats in front of me. Or I could be distracted in my own mind, on how I am going to make it through Gym class the next period. Or trying to impress other peers on what I think at the time makes me special. School Age kids are not fully developed mentally, and while they do learn a lot, it does take more effort to teach them, because their are a lot more on their minds than that engaging Physics class.

[@wrestlenewsnetwork5564]

@@gazzam3172 Well we dnt want another "crusade". RELEASE THE LIONS!!!!

[@bas919]

Big hope that _The Expanse_ gets more seasons and finish the book. It's the most realistic space series ever.

[@BRIDGETTattoo]

Thanks for uploading this video guys❤

[@geronimomartinez1469]

I can watch Neil and Chuck videos over and over … the most rewarding experience!! I wish we can have some politicians with 10% of these guys knowledge and common sense … we’ll be great again !🖖

[@aslansm]

The Expanse is so great because they represent stuff like acceleration, gravity and deceleration so realistically. Great references to the show. Thank you guys!

[@Alan-im1ez]

3:01 Lagrange point!!!🎉🎉🎉🎉 GO CHUCK!!❤❤❤❤

[@su_shadow9326]

I love Mr. Tyson's enthusiasm, it makes learning fun. Teachers, take note.

[@73mordka]

Oh, what an amazing explanation on acceleration unit. With every second your speed increases by the value of acceleration. It's beautiful, because it's so simple ❤❤❤

[@TorQueMoD]

This video and your Achieving Orbit video are literally mind-blowing! Love this channel! Thanks Neil and Chuck!

[@juancuelloespinosa]

6:35 if you wait enough time, you'll know whether you're on a rocket accelerating at 1g, or on a stationary rocket on earth. at some point, you'll have accelerated to lightspeed, at which point you'll stop accelerating, and become weightless again (and reach the end of time since relative to you, the time of everything else stopped) whereas on earth, you'll continue to feel 1g

[@zero11010]

Just a fun fact for the Expanse. Most of the characters you see are from the belt where they have very low gravity. They use earth’s gravity as a form of torture on these people in a scene (the weight of their body harming itself after NEVER experiencing that much gravity). This means the acceleration and the deceleration they use (the main characters who are largely from lower gravity places) is a much lower rate than what would be 1G for us. Which would also mean earth’s fleet can accelerate and decelerate with more force shortening their travel times (assuming they can afford the additional fuel).

[@tagmaster9522]

The Martians train in 1G so they could do it as well.

[@DJRCMACH]

Spot on and it's also shown in physical strength differences between troops loved the expanse for getting so many things right

[@Cbricklyne]

@@tagmaster9522 Correction : Martian MARINES train in 1g. Normal Martians don't, and wouldn't be able to stand 1g for very long. Even Martians in the Martian Navy but who are not Marines (like Bobby and her unit) but who pilot and crew the MCRN ships wouldn't be able to stand 1g - and even the Marines themselves like Bobby wouldn't be able to stand it for very long either. The show didn't show this scene (obviously they couldn't because it was mostly inner dialogue) but when Bobby was brought to Earth to testify about the Ganymede incident, and when she first landed and experienced Earth's gravity for the first time, it was then that it hit her that all that training they had been doing at 1g for a possible attack on Earth was useless since they would never have been able to last in a combat situation for very long in 1g even with all the training they had. Training in 1g and LIVING, BREATHING and existing in 1g and two completely different things, as she learned from her time on Earth. Earthers don't train in 1g - the LIVE in 1g, so they don't notice it or have to adjust to it. (P.S. - one detail they did get correct on the show as a neat kind of Easter egg sort of thing was during the panel on Earth when Bobby was testifying, in the second session in the afternoon (which Chrisjen had cleverly and intentionally planned to have them split that way), all the Martians in the Martian delegation were sat on the chairs all slumped back and exhausted from having been in Earth 1g for longer than they're used to. It gave the Earther's a home-field advantage from not having to negotiate with the Martians during the negotiation session from a position of (literal) weakness and exhaustion like the Martians had to. The show shows all the Martians sitting slumped back and looking drained on their chairs and I thought that was so so great that they did that)

[@andreikivorsky1726]

@@Cbricklyne damn I never realized that to be the case. I thought they sat like that on 2nd session was because they had a huge lunch lol.

[@tagmaster9522]

It's not just the Marines. It was all personnel who went off world. That way Earth wouldn't have an advantage in speed or if Mars invaded. Also, service was compulsory, so every Martian served at some point and all of them had the training. When Bobby went to Earth she was disoriented due to actual gravity in conjunction with everything else ie vertigo, (the same reason people get sea sick. Your eyes and ears are telling you different things) You can trian for weight but not for the sensory overload. The reason she was able to adjust was the homeless guy she gave the meds to. A big difference is, in training, the pull stops when the training does. On a planet, it doesn't. Chrisy said the gravity of earth isn't like training. It's an oppressive force, the weight of the world pulling you down.

[@carlosbuitragoZ]

Finally, you guys addressed The Expanse as "for real physics" TV show.

[@KatoOnTheTrack1]

Chuck impressed me pulling up the Lagrange point 😂😂

[@hombreleon]

I clicked the Like button as soon as Chuck mentioned the Lagrange point 😂✨

[@LocalFiveGuy]

I am a professional Elevator Mechanic. And, I feel like Neil Degrasse Tyson should know that the Elevator is the safest form of public transportation. Elevators have Safety devices all over the place. 😊If an elevator falls, it doesn't fall far before the safeties grab the rails.

[@nHans]

Yeah, he knows that. In previous videos, mentions have been made of Otis' invention of the safety elevator in 1853 etc. However, as a scientist, whenever Neil mentions an elevator, he always means an "ideal" elevator, not a real one. To him, an ideal elevator is one that is suspended solely by a cable above a hollow elevator shaft. And as soon as the cable is cut, it starts falling straight down, unobstructed, friction-free, and unaffected by air resistance. Einstein (1879-1955) too visualized an elevator the same way. Not quite what you and I would call an ideal elevator-but this is Neil's channel, so we have to abide by his definition.

[@brentjohnson415]

i love watching chuck get stoked about science. gets me pumped. thank you my man!

[@meridien52681]

OMG "The Expanse" was so, so, SO good! I was sorry to see it finish.

[@michaelmeier3445]

Why so much hate for the term "microgravity"? In my understanding this is supposed to indicate that gravity (or perceived gravity) is never exactly zero. Gravitational pull is slightly different over every point over Earth due to minute differences in density. This should cause small tidal effects. At the altitude of the ISS there is also still noticeable atmospheric drag. Likewise, photons from the sun and other sources constantly push against your spacecraft, causing ever so slight acceleration. I think "microgravity" captures this reality well, and it is easier to say than "forallpracticalpurposeszerogravity".

[@talbuky]

Oh this explainer opened a huge question for me, if accelerating at 1G for a few months would take us to a significant fraction of the speed of light, what is stopping us from sending a probe to proxima centauri for example. Is it that the amount of fuel needed to give even a light craft such acceleration is simply too much?

[@YouTuber-mc2el]

For the longest time I never understood the basic fundamentals of gravity because I took Cronkite's narration as gospel. It never made sense to me way back then and only until a couple of years ago I did a deep dive into gravity and boy what a rabbit hole that was. I learned an immense amount on not just gravity but a lot of collateral info along the way. It literally has changed how I look at things in my everyday life now.

[@danielmadar9938]

You guys always put a smile on my face 😂

[@carultch]

At 13:00, the reason it's called microgravity, is that it is impossible to nullify gravity completely in an orbiting spacecraft. There's still tidal forces and gravity from non-astronomical bodies (like human bodies) that cause gravity inside the international space station. We're talking micronewtons per kilogram, or even nanonewtons per kilogram, so it is tiny.

[@Momentsoflifeinreel]

Watching this from the remote village of worn torn country Afghanistan. I watch your videos everyday Dr. Neil and learning from you. There is no school nearby so, I am learning from your videos 😀😀

[@Neil_Neero]

Chuck at 16:46 Eureka Eureka!! 😂

[@jmanj3917]

16:50 A good rule of thumb, Lord Nice, is, "Add about ten meters per second, for every second it's (you're) falling".

[@RupertReynolds1962]

15:33 "if you accelerate at 1g" for "10 months" is fascinating because it depends on the frame of reference (almost but not quite the same as asking who observes the 1g). Now I might get this wrong, because relativity is tricky, but if someone on a spaceship experiences 1g weight (acceleration) for those 10 months, a distant observer would not observe the spaceship accelerating by the full speed of light. Einstein said it could not happen. You can only get close. The observer should see the spaceship appearing to get shorter and heavier, while the occupants feel normal. What do the occupants of the spaceship feel and see? Do they continue to feel their same (1g) weight due to the engine, but look out of the back window and see red-shifted light, when they might have expected to see total blackness because of the speed of light?

[@amauryginart]

You guys are awesome! Keep up the great work!

[@bonibroco1076]

15:30 I did the math. It will take 353 days 19 hours and 53 mins to attain light speed accelerating at 1g

[@talbuky]

Would you know how to calculate the amount of fuel per kg needed to maintain that acceleration?

[@sympicon9560]

Don't know how you calculate, but with 1g acceleration your rocket will never left surface of the Earth. You actually don't need rocket motor for it, because everybody around accelerate with 1g year after year. And obviously nobody reached speed of light. So it's more complicated...😅

[@StormsparkPegasus]

That math is really incomplete then, because you're not taking relativistic mass into account.

[@Paulinoagorong]

I love Startalk 🖤 Neil and Chuck, you're doing amazing work. I love you guys.

[@H2x2x2]

Brilliant episode! Loved it. ❤

[@bridgetmulvenna3965]

Love StarTalk so much!

[@DrDeuteron]

3:37 is not correct. The Lagrange point it not where Earth's gravity and the Moon's gravity are equal and opposite It's where they are equal and opposite in a rotating reference frame that keeps the moon fixed, so you must include centrifugal force to make it work.

[@naveen__1992]

Thanks for initiative

[@ashishawasthi4350]

These guys are just rocking I teach physics and love this show so much … Initially I thought Chuk was just irritating and obstructing the flow … but guess what … I was wrong … he is an awesome comedian with perfect timings … and also seems to be very smart ….I can’t watch this show without Chuk now …

[@grapy83]

A very good episode! Now I imagine people will enjoy even more the effects shown in The Expanse TV series.

[@rooyajabarkhil5260]

This was a great episode, thanks!

[@waynegosson1793]

This show turns a frown upside down. Each and every time. Thanks 😊 again !!

[@juliam7056]

Cool episode , you guys are the BEST !!!

[@ksscientistorrapper9919]

Love this show man!

[@winchesterbear]

A coordinate system in free fall can be made small enough that, relative to itself, the gravitational field around its origin is basically Minkowskian. That is, the 16 components of the gravity field/tensor are not functions of space-time, and objects will resist any acceleration. This is also called an Inertial System. In general, the gravity tensor field is a function of space-time; therefore, gravity has a gradient, and the force of gravity will hold objects in their predicted geodesic motion, which generally is accelerated motion, usually with only a radial component. The tangential resistance to change its geodesic is traditionally thought of as its "mass." The resistance to change its radial acceleration is traditionally thought of as its "weight."

[@vlatkopetrucci]

Dear Dr. Neil deGrasse Tyson, I LOVEEE to hear and talk about science and space, appreciate everything that YOU and your hosts do! Wondering about misleading microgravity, just maybe NASA thinks about microgravity as the condition the body is in - "0" G, but when the body acts on it self with its own gravity? Like a water drop, every time its in "0" G forms a sphere, because of its own mass and gravity acting on its self (e.g. microgravity) ;) am I right?

[@PaulCz-h20]

Water droplets become round in "0" G not due to own microgravity but due to water molecules attracting each other through electric charges within the molecules. That is how most substances on human size scales stay together. Gravity is much too weak of a force to attract small masses compared to electromagnetic forces. Gravity is about 20 orders of magnitude weaker than electromagnetic forces. Gravity only becomes significant when there are huge masses involved.

[@Tormentadeplomo]

This is a great show. Thank you guys.

[@byronwatkins2565]

"g" is acceleration. More specifically, "g" is acceleration due to explicit force(s). A car in a sharp turn exerts an explicit force on the occupants. A rocket after liftoff exerts an explicit force to lift astronauts into space. Gravity is everywhere -- it is called "Netwon's universal law of gravitation" for good reason. But, if other explicit forces are absent, then the resulting "free fall" (due to gravitational forces only) is perceived identically to an absence of forces. However, the gravitational force has spherical symmetry. Each mass creates spherical shells around itself wherein all other masses get accelerated toward that mass. These spherical shells are different from a rocket engine's acceleration in one small respect: these spherical shells result in "tidal forces" -- closer objects have higher acceleration and the acceleration vectors are not parallel. In fact, these tidal forces (and small orbit corrections) are what NASA calls "microgravity." "If you accelerate at 1 g for ten months" -- in whose frame of reference? It is not possible for mass to reach the speed of light. Viewed from earth, the ship would become more and more sluggish. At first, only very precise measurements would note the decreased acceleration. But above 0.9 c, the observed acceleration gets closer and closer to zero despite the occupants of the ship 'feeling' the same 1 g acceleration as from the beginning. Contrarily, if you tried to accelerate the ship so that viewers on earth observed a constant 1 g acceleration, then the occupants of the ship would experience higher and higher "upward" force. Eventually, this force would crush them and the ship.

[@kinotikimathi9106]

I already knew this but i'll listen to Chucks version anyday

[@Temple.Of.Osiris]

I love when chuck is listening to Neil; and he repeats what he’s saying 0.00002 seconds after Neil says it. like he knew this info already and they said it at the same time!😭

[@Morpheux1]

12:35 Does anyone know where is the original video for this experiment?

[@bonibroco1076]

kzbin.info/www/bejne/oXXQk2B3i7mAbM0

[@LennyDucano]

This was another amazing one y’all!!! Thanks for the information 🙌🙃

[@danthemanoftheland]

Fantastic! Feed my brain!! ❤ Thanks, Neil and Chuck!

[@gtbkts]

Thanks for the awesome content and great video!!

[@sammyhill93]

Ty and That Guy! You better go on, Neil! The Expanse is the best SciFi show of all-time 🤘🏼

[@mitrayusinha9810]

Plz make videos on gravity for our better understanding. My request to you sir.

[@fraliexb]

9:08 Neil I believe is incorrect that someone in a balloon with a scale would weigh the same as someone on the surface, since gravity effects get weaker the further you are from the center of the planet. So if you want to weigh the least on the surface of Earth, you would go to the highest peak on the equator in order to weigh yourself. Combining the centrifugal force of the spinning planet plus the difference in gravity on the high elevation.

[@nHans]

Yes, Neil has mentioned in several earlier explainers that you weigh more at the poles and less on the equator and on the top of mountains. Also yes, you'll weigh a little less in a balloon that's above Earth's surface (and isn't ascending or descending) than on Earth's surface. But because such balloons don't go up too high, the difference in weight will be too small to be noticeable on a typical scale.

[@fraliexb]

Plus didn't think about it but air pressure at sea level and air pressure at 5,000 feet would not be the same downward force added upon the gravity force exerted upon you to define your "weight."

[@BonBonBonni]

I love you guys! So informative and funny 😂

[@edwardallenthree]

I'd love to hear more talk about the "artificial gravity" on the expanse that is created by centrifical force. It's been a while since I saw the show, I only watched the first season, but I recall like water flowing in a spiral when being poured out in those environments. Love to hear more about that.

[@linyenchin6773]

*generated, not "created" aka "instantly manifested from nothing." Generation is a pricess, a thing if cause and effect or "causality" if you prefer putrid and gaudy terms of intellectuals.

[@Ketraar]

That scene with the water pouring is because they are on Ceres and they artificially spin it to create gravity. Dr Becky explains this in one of her videos here -> kzbin.info/www/bejne/hWOYXpKbesmrl9k

[@edwardallenthree]

@@linyenchin6773 god created centrifical force! /S

[@fredbohm4728]

@@edwardallenthree There is no evidence for the existence of any god.

[@edwardallenthree]

@@fredbohm4728 bless you, the slash ess means sarcasm.

[@JohnDoe-sy6tt]

These Brothers are great together!

[@Tina-d8f]

Very informative.

[@pranaydoshi6145]

Wow...what an informative and fun episode as always...Lots of love and respect from India...

[@jasonvangeuns9062]

That was awesome. So easily explained very interesting. And yeah the tv series The Expanse also a favorite of mine.

[@-chrislopezskate-5175]

Gotta love the humor they put in with this info 👏🏽😂

[@israelrojas5541]

I love this podcast so much man

[@brandonsmith1838]

Make a explainer on why you can't just accelerate at 1g for 10 months to reach the speed of light. Or even go faster. At what point does it go wrong?

[@AnantMall]

great question! wondered the same!

[@sympicon9560]

Well everybody on the Earth surface accelerates with 1g all the time. Can wait for speed of light for ever..😊

[@VoltisArt]

Came about 40 seconds away from posting a really frustrated comment about the absence of the idea of deceleration or negative acceleration. Almost 18 minutes without it. Saved it at the end guys, lol. Deceleration is _half_ the work of any space travel that doesn't end in a crash, so it's not to be ignored.

[@jerryadamsjr2201]

Thank you Dr. Tyson and Chuck.

[@randomlegend631]

15:30 i have literally been wondering this for the longest time

[@TheH8redd]

Kerbal space program taught me alot about this. Travvelling in Space is just going from one gravitational field to another and the way I am understanding it is this way. First, lets review the equation : G= M1*M2 / Distance between object squared. Which means, that although you cross the lagrange point, you are still in the gravitational field of the earth, but due to this, the moon has more influence on you than the earth, you are puled towards the moon more than towards the earth. Not only that, You are also in the Sun' gravitatinal field, and also you are in the milky way's garvitational field, which, in turn also in the so called big attractor's gravitational field, which is probably also into another bigger gravitational field. A single atom at the other end of the universe will also have a gravitational pull on you, although so microscopic it is. In this Universe, everything attracts everything else, and everything else attracts everything. There is no such thing as the end of a gravitational field. You just transit from the weakest one to the stronger one all the time.. There is no way to escape gravity, and gravity is RELENTLESS. Gravity crushes stars into balls of neutrons and black holes. It holds galaxies together, it hold everyhting together. YOU WILL NEVER ESCAPE GRAVITY, no matter how far away you are.

[@isatousarr7044]

Space is often described as a zero-gravity environment, but this is a bit of a misnomer. In reality, objects in space experience microgravity due to the continuous free-fall towards Earth or other celestial bodies, creating the sensation of weightlessness. This aligns with Einstein's equivalence principle, which states that local effects of gravity are indistinguishable from acceleration. How do these principles help us understand the effects of gravity on objects and experiments conducted in space?

[@HTphyzycs]

Would love to see you on the expanse podcast, ty and that guy!

[@ianflanagan209]

I learned about lagrange points as a little kid watching mobile suit gundam.

[@patticampana9458]

Learning so much! Respect to both of you!✌️

[@dawnhansen7886]

I Love these guys ❤ I LOVE STARTALK ❤ SERIOUSLY

[@brandon-gr7yq]

Thank you guys for all you do!

[@Articulate99]

Always interesting, thanks.

[@ADergal96]

Amazing video! Thank you so much!

[@R0bobb1e]

From your reference point, it is zero G, but from any other point of reference, you have a non-zero acceleration. If you were on the ISS, would you eventually hit the front of it if you were floating in the middle, due to the frictional deceleration cause by atmospheric drag?

[@lyndonellison1514]

The position of a particle in space is a function; the velocity of the particle is the derivative of the function; the acceleration of the particle is the second derivative of the function, or the first derivative of the velocity.

[@amardeep46]

Chuck will soon be Dr.Chuck

[@ryiro9611]

I think when they refer to microgravity its because gravity at surface of the earth is ~9.8 but as you go above (or below) the surface the gravity keeps reducing(in different factors)....So if you're in an object that is long enough....say 100m tall, the gravity at the two ends of that object will be slightly different.....and when you go further away from the Earth, that difference can be significant....especilly in the orbital zone....for instance an object that is 100m long orbiting the earth 2000 km away from the surface will have a 1% gravity difference(from earth) between its two ends that are facting towards and away from earth

[@DrDeuteron]

search "SRTM torque rotation"

[@jump_tech_solution]

I am rohit from india , i heared about neil tyson science book by news channel when neil meet with prime minister Narendra modi. I want learn about more science consept. Thanks neil for your contribution of humanity .

[@rodwynrhind5573]

Now that was a really interesting chat that kept me listening all the way through.. (thru - for you Americans)

[@shogunner8286]

When ever people say I will put it in the description of the video.. noooo you wont. Anyway great to see these videos.

[@brettschipper2250]

Amazing content and presentation. I wish Niel would have been my calculus teacher.

[@phenixorbitall3917]

I think Chuck has become a physicist too and THAT'S really cool :)👍 Basically; each time we jump into a swimming pool, we are in zero G until we hit the surface. Fine for explaining this thing with micro gravity - I've always hate this term.

[@820hurleyj]

Love your guy's explanations!

[@Miner3dBurns]

Great video, and very entertaining :)

[@capeverdeanmedia]

This is interesting science.💎 imagine if Steve uncle was on this show...😃wit chuck also.

[@jimrodarmel8512]

Let me try to explain why NASA calls it micro-gravity (in orbit) (3:16). While in the vicinity of Earth or any sufficiently massive body, you are affected by the gravity created by that body and it changes how you move through space. The gravity field accelerates/decelerates you, your spacecraft, and other contents of you spacecraft all together, so you don't feel or observe effects of different accelerations within the spacecraft. The velocity of your spacecraft system as a whole with respect to other objects (e.g., the Earth) is still changing because of gravity. At minimum, the direction component of your velocity vector changes while the magnitude remains constant (circular orbit). Even if the magnitude changes as well (elliptical orbit), the spacecraft and all the contents are being changed at the same rate, so any changes to the system within the reference frame of the spacecraft (e.g., tidal forces) are very small. They are not absent though, so to avoid erroneous assumptions, NASA favors referring to these situations as micro-gravity, not zero-G.

[@pejko89]

I was a 2nd grade elementary school when a friend of mine went to wash a sponge and change water in a bucket which we used to wash the blackboard, and he was making windmill turns with his arm while holding a bucket full of water and not a drop would spill. We were all amazed. And none of us knew anything about it. And 25 years later he still doesn't understand why, but he just intuitively discovered that.

[@milosstojanovic4623]

He still did not learn why !? For real!? People are really dumb 🤦 😔

[@pejko89]

@@milosstojanovic4623 O don't think he's dumb. Most people don't think about this stuff

[@milosstojanovic4623]

@@pejko89 those things are learned in elementary school 🤦😔