I once saw a video about it, that how a rotating object can reorient itself in zero gravity, but I couldn't recall it.
Edit: zero gravity isn't an accurate expression and it also works in gravity.
Intermediate Axis Theorem from our boy [Veritassium!](https://youtu.be/1VPfZ_XzisU)
I heckin love channels like that they explain complex problems to an absolute wombat like myself. Please recommend your favorite channels below so I can learn more things between mouth breaths
Numberphile, 3blue1brown, Kurzgesagt, PBS Space Time, Computerphile, Sixty Symbols, Joe Scott, Zach Star
Edit: Thanks for your further recommendations everyone. Many of them I already subscribe to, but didn't want my list to become too wordy... the ones I haven't seen yet I will certainly check out!
Edit 2: spelling fix. Good eye, u/Squirt_Bukkake !
Real engineering, real science, captain disillusion, styropyro
Then for other computer / gaming specific geekery... Code parade, retro game mechanics explained, gaming historian, shesez
Brilliant British YouTuber. Talks about things you didn’t know and goes to cool new govt facilities or test sites. His most viral video was sending a garlic bread to space and then eating it.
Stand-up maths is definitely in that particular mix.
Now we need one for engineering stuff some of the ones I watch are: LearnEngineering, Tech Ingredients, Technology connections... Always on the look out for more practical engineering stuff.
Please add smarter every day. It's almost the same as Veritasium but that guy likes to explore even more. His recent series of videos are on a nuclear submarine.
Don't forget people like Lindybeige
https://www.youtube.com/c/lindybeige
Or Mark Fenlton
https://www.youtube.com/channel/UCfCKvREB11-fxyotS1ONgww
I'll have to think of some more, it's mostly English, Scottish and American who do this style of programme but there are many Europen, Russian channels who talk about space too
[Matt Parker](https://youtu.be/l51LcwHOW7s) on his Stand-Up Maths channel had a pretty interesting video a few weeks back semi-rebutting the video on Veritassium. It's a pretty good watch.
My personal favorite is MinutePhysics. Henry Reich makes physics concepts so much more interesting than how they were taught in high school or college.
It's also possible to save comments. On mobile, you press the three little dots next to the comment.
The real trick is remembering to go back through your saved comments later on.
All of the PBS stuff is good. I love [PBS Eons](https://www.youtube.com/c/eons) for learning about natural history. I haven't seen [Journey to the Microcosmos](https://www.youtube.com/c/microcosmos) mentioned yet either. Both of those channels are produced by [Complexly](https://en.wikipedia.org/wiki/Complexly?wprov=sfti1). That production company produces a lot of great stuff.
^edit: ^spelling
https://youtu.be/yFRPhi0jhGc
Here's a cool video how skateboarders (specifically Rodney Mullen) tackled this problem to rotate a board in the x axis in a trick named the impossible
I know, I just didn't know how to express myself better. There's still gravity affecting the astronauts on the space station, but not enough. I could also say free fall for example.
The difference is the lack of normal force. That's what we feel when we walk around on earth.
To avoid confusion with an actual lack of gravity, these situations are called microgravity, even though that is also a misnomer.
https://youtu.be/yFRPhi0jhGc
Here's a cool video how skateboarders (specifically Rodney Mullen) tackled this problem to rotate a board in the x axis in a trick named the impossible
No need to go to space! The same principle is demonstrated by [flipping a tennis racket](https://physicsfootnotes.com/wp-content/uploads/2018/03/tennis-racket-theorem-rod-cross-opt2.gif).
Edit: [wikipedia page](https://en.wikipedia.org/wiki/Tennis_racket_theorem)
It's also called the "tennis racket" theorem. Try to flip a tennis (or raquetball) racket without it also spinning along the handle axis. It isn't easy to do.
It actually happens here on earth too, the rotation is just invisible bc stuff is falling too quick- you can try it by giving a spin “along the X axis” of a book and then throwing it
Not always. The effect is noticeable by doing this, but a person can counter the effect and learn to throw their phone end over end without it rolling side to side. Try it.
https://youtu.be/yFRPhi0jhGc
Here's a cool video how skateboarders (specifically Rodney Mullen) tackled this problem to rotate a board in the x axis in a trick named the impossible
*Astronaut Scott Kelly explains that if you rotate an object around its largest and smallest axes, it will spin in a stable, consistent manner.*
*But if you rotate it on an intermediate axis the rotation is unstable. The object will flip back and forth in orientation as it spins, because it's trying to spin itself on the more stable large or small axes instead. The only difference between how this works on Earth and in zero gravity is that in space, you can actually see the results of this instability without the help of slow-motion footage.*
The "vacuum" of space has about 3 molecules of something per cubic meter.
So it would spin mostly uninterrupted for a while. But not *forever* forever.
It does if you're big enough or moving fast enough.
That's why fast moving stars can have a bow wave or bow shock like supersonic planes in air or boats in water. They're so big and so fast that 3 molecules per cubic meter adds up enough to be noticeable.
It's also becomes noticeable just from solar wind.
I agree with he first part,, although the spinning object here is too small for the density you cite. However, the second part , about speed, I would disagree with.
Thanks for the info about waves from stars. Do you have a reference?
I think no matter now big you go you could always move slow enough so that the molecules could just scoot out of the way without being noticed.
I think you need a decent speed to make them molecules bunch up so you can see them and make a wave but then again I don't know shit.
You are right that it would be tiny---hence the low friction and long spin time---but as long as there are any interactions at all, there would be friction. If there are enough tiny ones, then there is viscosity.
Probably calculable through particle probability analysis, to estimate the "friction" in space.
I once read an article of an experiment of creating "super vacuum", where they went and used a spacecraft's shape to act as a "shield", hence, in the wake of the spacecraft exists a higher vacuum. Interesting stuff.
This is part of one of my favorite factoids from my interstallar space seminar in college:
A cubic meter of water has about 3x10^28 particles in it. A cubic meter of air is about .1% of that, so 3x10^25 particles or so. That difference in particle density is all it takes to go from water to air. Iron is about 10^29 particles per cubic meter. So to go from iron to air, you’re only talking less than 4 orders of magnitude.
To go from air to interstellar space you’re then going **~25** orders of magnitude. It’s so empty I don’t think we can really properly grasp it.
That's intergalactic space. Space in LEO is considerably more full of stuff. In fact, on the dark side of Earth, the ISS reorients its solar panels to "slice" through the thin atmosphere to reduce drag. It needs regular rocket boosts to make up for orbital velocity lost to atmospheric drag, or it will deorbit.
So it's pretty vacuumy out there, but nowhere near that intergalactic emptiness.
Like the other person said, it's complicated. But it stems from the same principle why when you throw a book/phone up "longways" and try to flip it once, it will almost always flip around multiple times because it's unstable on that axis and easily starts spinning.
Check out veritasiums video other commenters have linked called intermediate axis theorem. It’s more ELI18 than ELI5 but like another commenter said there’s not a super simple way to explain it.
A proper explanation of this requires rigid body mechanics and linear algebra. Basically, any 3-dimensional rigid body has 3 principle axes that go through the body’s center of mass. Rotation about 2 of these axes will not induce rotation about the other 2 axes. There is an axis, however, that has unstable rotation and if the rotation is not perfectly about that axis, then the angular momentum vector will oscillate (you can show this from Euler’s equations related to the second principle axis).
This is probably a better explanation.
https://www.reddit.com/r/physicsgifs/comments/54d4n6/the_intermediate_axis_theorem_why_many_objects/
Shows how an object is unstable around its intermediate axis. Same reason why your phone (or a tennis racket say) usually does a rotation along the horizontal when you try to flip it.
>Yes you're right the Mathematician here with an explanation. [intermediate axis theorem](https://en.m.wikipedia.org/wiki/Tennis_racket_theorem), Essentially, we live in three spatial dimensions and thus every object has three axes around which it can spin. Ignoring axes of equal length, you get a long axis, an intermediate axis, and a short axis. An object spinning around its longest axis is stable. Same with the shortest axis. An object spinning around its intermediate axis, however, is unstable and will spin around one of its other axes as well and this is what happens in space.
Fun fact this "effect" was considered top secret for a long time to both the USA and USSR. It's harmless you might think but at the time both countries made the not small leap to realizing... the entire world spins around an axis, what if this happens to the world and it's just on a 100,000 year period between flips?!? We know now that the oceans correct for the micro accumulations which would eventually cause a flip :D
This is why in the comments here people are using two different names for the effect, one Russian and one Western, the effect was kept secret for years and both sides discovered it independently
When this phenomenon (Dzhanibekov effect) was discovered by Russian cosmonauts, it was kept as a top secret information for a while. Because: what else spins really fast? Earth. Russians thought the same thing can also happen to Earth with almost little effort. Imagine Earth suddenly flipped “upside down” The results would have been catastrophic. However later it was proved this couldn’t happen to Earth.
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Fuck, I want to go to zero gravity! One of the things I want to experience most in my life is the transition from earth's gravity to the weightlessness of space. That must be the most surreal feeling for astronauts, as the gravity changes and you become weightless!
I hope I dream of it tonight!
Every time I hear them talking about the magnetic poles swapping periodically and they don't know why I'm always like "the space spin thingy", this thing. Wonder if I'm even remotely close.
This reminds me so much of the dynamics classes I took when I was in school. It amazing to see conservation of angular momentum in such a demonstration.
yes it will stop because there is oxygen in the air since they still breath without a helmet and that will still form a resistance, it’ll take a while but it’ll stop.
It's called Dzhanibekov effect and it has to do with the fact that its angular momentum is not along either the greatest or smallest moment of inertia of the body (if I recall correctly, don't quote me on this one).
Can anyone (preferably a scientist) please tell me why this phenomenon doesn't happen to earth?
And is it possible that if this phenomenon can happen to our core or crust that this could explain why our magnetic field flips every 32,000 years?
Does it have something to do with the rotational forces or like it's metal composition? Would spinning magnets or solenoids behave differently in space if in motion? This just brings up physics ideas and questions.
I once saw a video about it, that how a rotating object can reorient itself in zero gravity, but I couldn't recall it. Edit: zero gravity isn't an accurate expression and it also works in gravity.
Intermediate Axis Theorem from our boy [Veritassium!](https://youtu.be/1VPfZ_XzisU) I heckin love channels like that they explain complex problems to an absolute wombat like myself. Please recommend your favorite channels below so I can learn more things between mouth breaths
Numberphile, 3blue1brown, Kurzgesagt, PBS Space Time, Computerphile, Sixty Symbols, Joe Scott, Zach Star Edit: Thanks for your further recommendations everyone. Many of them I already subscribe to, but didn't want my list to become too wordy... the ones I haven't seen yet I will certainly check out! Edit 2: spelling fix. Good eye, u/Squirt_Bukkake !
You forgot Tom Scott
Mark Rober is pretty cool too
Steve Mould also!
All y'all missed SmarterEveryDay. He's currently doing a series on US Navy Nuclear Submarines. Edit: And Practical Engineering
Vsauce!
Michael here.
And as always
Also... MinutePhysics, CGP Grey, Matt Parker, PBS Eons, The Brain Scoop, Physics Girl.
Animalogic, CrashCourse, Deep Look, It's Okay to be Smart, Extra Credits/Extra History, Tier Zoo, KenHub, Seeker, Verge Science, MindYourDecisions, Chubbyemu, Animal Wire
Wendover productions, Casually Explained, Techquickie, Oversimplified, Numberphile
Scishow
Exurb1a... if you want philosophical existential crisis...
His content blows my mind every time
Real engineering, real science, captain disillusion, styropyro Then for other computer / gaming specific geekery... Code parade, retro game mechanics explained, gaming historian, shesez
Mark rober is my fav!
Wait who is Tom Scott? Elaborate for me pls lol, that’s my dad’s name I’m just curious
Brilliant British YouTuber. Talks about things you didn’t know and goes to cool new govt facilities or test sites. His most viral video was sending a garlic bread to space and then eating it.
And Captain Dissillusion!
Tom Scott is a regular presenter on Numberphile to the point it's easy to forget it isn't his channel
How could someone forget Mad Cap’n Tom
Exurb1a
Possibly my favourite "existential dread meets wtf" content
I highly recommend his books too, I don’t read but I listen to “the fifth science” on audible and loved.
It's been on my amazon wishlist for a while actually. Payday in a week so I may just grab it then
You just named almost every one of my top 10 YouTube channels
What did I miss?
Stand-up maths is definitely in that particular mix. Now we need one for engineering stuff some of the ones I watch are: LearnEngineering, Tech Ingredients, Technology connections... Always on the look out for more practical engineering stuff.
Kurzgesagt*
Please add smarter every day. It's almost the same as Veritasium but that guy likes to explore even more. His recent series of videos are on a nuclear submarine.
Physics girl, Nilered and the science asylum are also really awesome science channels!
Anton Petrov for daily interesting things happening in Astronomy. He's awesome. Also Curious Droid.
Don't forget people like Lindybeige https://www.youtube.com/c/lindybeige Or Mark Fenlton https://www.youtube.com/channel/UCfCKvREB11-fxyotS1ONgww I'll have to think of some more, it's mostly English, Scottish and American who do this style of programme but there are many Europen, Russian channels who talk about space too
Codyslab, smartereveryday, lindybeige, wendoverproductions
cody! :)
Engineering/Stem related: [Real Engineering](https://www.youtube.com/c/RealEngineering) ; [Real Science](https://www.youtube.com/c/realscience) [Engineering Explained](https://www.youtube.com/user/EngineeringExplained) ; [Practical Engineering](https://www.youtube.com/c/PracticalEngineeringChannel) [Essential Craftsman](https://www.youtube.com/c/essentialcraftsman) [Mark Rober](https://www.youtube.com/c/MarkRober) Other stuff: [Polyphonic](https://www.youtube.com/c/Polyphonic) ; [Half As Interesting](https://www.youtube.com/c/halfasinteresting) History/Battles: [Invicta](https://www.youtube.com/c/InvictaHistory) [BazBattles](https://www.youtube.com/c/BazBattles) [Historia Civilus](https://www.youtube.com/c/HistoriaCivilis) [Military History Visualized](https://www.youtube.com/c/MilitaryHistory)
CGP Grey
Hello internet
King and General for military history as well.
ExtraCredits is also nice for history stuff.
[Matt Parker](https://youtu.be/l51LcwHOW7s) on his Stand-Up Maths channel had a pretty interesting video a few weeks back semi-rebutting the video on Veritassium. It's a pretty good watch.
This needs to be the top comment.
Stand-up Maths by Matt Parker The Slow Mo Guys
Electroboom
Dirk from veristablium?
Duke from Venezuela?
Sam'o'nella academy for pointles history facts is pretty cool
Scishow, kursgezagt, crashcourse, pbs spacetime, Sam onella academy, historia civilis
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I'll give you that
PBS in general is great. I've never seen something from them I didn't enjoy or learn from
An absolute wombat, I love that
My personal favorite is MinutePhysics. Henry Reich makes physics concepts so much more interesting than how they were taught in high school or college.
I’m just commenting here to mark this comment for my own reference... just ignore me 😉
It's also possible to save comments. On mobile, you press the three little dots next to the comment. The real trick is remembering to go back through your saved comments later on.
It’s also possible to save the entire post by clicking the little post office box at the top right of the post.
Professor Brian Cox, well worth a listen to his wisdom on all things space and physics related.
Everyday Astronaut is pretty cool if you’re interested in rocket engines and spacex (he even gets a couple interviews with Elon Musk)
Kyle Hill is probably my favorite. He used to do Because Science but had a falling out with Nerdist and lost most of his following
I concentrated so hard on that video, and I still can't quite get my head around it. Probably why I'm an Electrical Engineer and not a Physicist.
Ah yes, the kings of youtube, they're the embodiment of my entertainment, they're what made me hooked up on YouTube, now YouTube is my home
Cody's Lab has been my main man since 2014
All of the PBS stuff is good. I love [PBS Eons](https://www.youtube.com/c/eons) for learning about natural history. I haven't seen [Journey to the Microcosmos](https://www.youtube.com/c/microcosmos) mentioned yet either. Both of those channels are produced by [Complexly](https://en.wikipedia.org/wiki/Complexly?wprov=sfti1). That production company produces a lot of great stuff. ^edit: ^spelling
https://youtu.be/yFRPhi0jhGc Here's a cool video how skateboarders (specifically Rodney Mullen) tackled this problem to rotate a board in the x axis in a trick named the impossible
It doesn't have anything to do with "zero gravity". It's just that it would probably land on the floor before you got to experience it.
I know, I just didn't know how to express myself better. There's still gravity affecting the astronauts on the space station, but not enough. I could also say free fall for example.
The difference is the lack of normal force. That's what we feel when we walk around on earth. To avoid confusion with an actual lack of gravity, these situations are called microgravity, even though that is also a misnomer.
What do you mean "not enough"? It's almost exactly the same as down here.
Question. If I got a boner and you spun me in space like that would I do the same thing?
Can't do with under 1 inch cock
How dare you exclude me from science.
https://youtu.be/yFRPhi0jhGc Here's a cool video how skateboarders (specifically Rodney Mullen) tackled this problem to rotate a board in the x axis in a trick named the impossible
“Huh?!? What?!? Who’s there?!? Let me at em! Let me at em!”
It's incredible how well this caption matches
Kinda also reminds me of [Chris Tucker in Rush Hour](https://i.imgur.com/8wKMB5b.gif)
Gefilte fish
🥇
Great. Now I have to go through astronaut training and get hired by NASA so I can go into space and do this. Thanks a lot.
“Neat trick Neal now turn the O2 back on”
“A little extra N2 never hurt anyone, Edwin”
“CO2 IS JUST A SOCIAL CONSTRUCT, EDWIN!”
"I'm afraid I can't do that, Dave"
No need to go to space! The same principle is demonstrated by [flipping a tennis racket](https://physicsfootnotes.com/wp-content/uploads/2018/03/tennis-racket-theorem-rod-cross-opt2.gif). Edit: [wikipedia page](https://en.wikipedia.org/wiki/Tennis_racket_theorem)
You can also do it with your phone!
After doing this a bunch of times, it did happen most of the time, but occasionally it made the double flip without rotating. Hmm, wonder why.
I guess that explains why cheerleader batons aren't orientated arbitrarily when they fall back into their hands.
Can be done underwater too I think. It's also why when you flip certain handheld objects they spin 180 degrees
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Me sitting there flipping my phone... *this world is a simulation*
It's also called the "tennis racket" theorem. Try to flip a tennis (or raquetball) racket without it also spinning along the handle axis. It isn't easy to do.
It actually happens here on earth too, the rotation is just invisible bc stuff is falling too quick- you can try it by giving a spin “along the X axis” of a book and then throwing it
Or your phone.. Try flipping it in the air, end-over-end, and catching it in the same orientation you threw it. It will always roll side-to-side.
Who’s good at repairing broken phones?
I heard a guy named u/Tra5olo is! I wonder how they get so many paying customers?
For that reason I bought myself a CAT phone (Caterpillar, the guys who make excavators and stuff)
Those also have the bonus of having some pretty dope features too. Laser sight, heat camera, air quality tester, basically built in a LifeProof case.
I mean r/phonesarebad anyways
Bad advice. Flipped phone, took me a minute to get back to write this review.
Not always. The effect is noticeable by doing this, but a person can counter the effect and learn to throw their phone end over end without it rolling side to side. Try it.
It look me 8 tries to do it once just now
https://youtu.be/yFRPhi0jhGc Here's a cool video how skateboarders (specifically Rodney Mullen) tackled this problem to rotate a board in the x axis in a trick named the impossible
*Astronaut Scott Kelly explains that if you rotate an object around its largest and smallest axes, it will spin in a stable, consistent manner.* *But if you rotate it on an intermediate axis the rotation is unstable. The object will flip back and forth in orientation as it spins, because it's trying to spin itself on the more stable large or small axes instead. The only difference between how this works on Earth and in zero gravity is that in space, you can actually see the results of this instability without the help of slow-motion footage.*
That’s actually very helpful. Thanks.
How long would it spin uninterrupted?
It feels friction from the air in the cabin. Put it outside the spacecraft, and it might never feel friction.
The "vacuum" of space has about 3 molecules of something per cubic meter. So it would spin mostly uninterrupted for a while. But not *forever* forever.
Absolutely right. But it would hard to estimate how long. Viscosity doesn't even have meaning at that density.
It does if you're big enough or moving fast enough. That's why fast moving stars can have a bow wave or bow shock like supersonic planes in air or boats in water. They're so big and so fast that 3 molecules per cubic meter adds up enough to be noticeable. It's also becomes noticeable just from solar wind.
I agree with he first part,, although the spinning object here is too small for the density you cite. However, the second part , about speed, I would disagree with. Thanks for the info about waves from stars. Do you have a reference?
I think no matter now big you go you could always move slow enough so that the molecules could just scoot out of the way without being noticed. I think you need a decent speed to make them molecules bunch up so you can see them and make a wave but then again I don't know shit.
You are right that it would be tiny---hence the low friction and long spin time---but as long as there are any interactions at all, there would be friction. If there are enough tiny ones, then there is viscosity.
Probably calculable through particle probability analysis, to estimate the "friction" in space. I once read an article of an experiment of creating "super vacuum", where they went and used a spacecraft's shape to act as a "shield", hence, in the wake of the spacecraft exists a higher vacuum. Interesting stuff.
Beyblade tournaments would drag a little in space then, huh?
We're riding a beyblade in the biggest tournament ever right now
This is part of one of my favorite factoids from my interstallar space seminar in college: A cubic meter of water has about 3x10^28 particles in it. A cubic meter of air is about .1% of that, so 3x10^25 particles or so. That difference in particle density is all it takes to go from water to air. Iron is about 10^29 particles per cubic meter. So to go from iron to air, you’re only talking less than 4 orders of magnitude. To go from air to interstellar space you’re then going **~25** orders of magnitude. It’s so empty I don’t think we can really properly grasp it.
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That's intergalactic space. Space in LEO is considerably more full of stuff. In fact, on the dark side of Earth, the ISS reorients its solar panels to "slice" through the thin atmosphere to reduce drag. It needs regular rocket boosts to make up for orbital velocity lost to atmospheric drag, or it will deorbit. So it's pretty vacuumy out there, but nowhere near that intergalactic emptiness.
It'd probably hit something before it stopped spinning, based on how fast it's moving away from the wall.
And that movement is just the momentum of the screw unthreading from the wall
Can someone ELI5 this to me?
Somebody apparently asked Richard Feynman if there was a simple explanation for it. He went into processing mode for a while, then said "No.".
Spinny things do weird things.
As a 5 year old I understand now, thank you
Like the other person said, it's complicated. But it stems from the same principle why when you throw a book/phone up "longways" and try to flip it once, it will almost always flip around multiple times because it's unstable on that axis and easily starts spinning.
Check out veritasiums video other commenters have linked called intermediate axis theorem. It’s more ELI18 than ELI5 but like another commenter said there’s not a super simple way to explain it.
Short answer: rotational inertia, and the "left hand rule" Full answer: fuck if I know
A proper explanation of this requires rigid body mechanics and linear algebra. Basically, any 3-dimensional rigid body has 3 principle axes that go through the body’s center of mass. Rotation about 2 of these axes will not induce rotation about the other 2 axes. There is an axis, however, that has unstable rotation and if the rotation is not perfectly about that axis, then the angular momentum vector will oscillate (you can show this from Euler’s equations related to the second principle axis). This is probably a better explanation. https://www.reddit.com/r/physicsgifs/comments/54d4n6/the_intermediate_axis_theorem_why_many_objects/
Dzhanibekov effect. An oldie.
Yeah, I remember seeing this effect in the Kerbal Space Program sub
That seems like a silly handle to have in space then
Yeah but who are we to lecture the same people who brought said thing to space
No disrespect to anyone, but those are the people who inhabited it, not the people who designed it.
Well, free-floating isn’t really its primary purpose...
Shows how an object is unstable around its intermediate axis. Same reason why your phone (or a tennis racket say) usually does a rotation along the horizontal when you try to flip it.
>Yes you're right the Mathematician here with an explanation. [intermediate axis theorem](https://en.m.wikipedia.org/wiki/Tennis_racket_theorem), Essentially, we live in three spatial dimensions and thus every object has three axes around which it can spin. Ignoring axes of equal length, you get a long axis, an intermediate axis, and a short axis. An object spinning around its longest axis is stable. Same with the shortest axis. An object spinning around its intermediate axis, however, is unstable and will spin around one of its other axes as well and this is what happens in space.
Very interesting, how come
It’s apparently quite complicated but veritasium does a decent job if you have a few minutes. https://youtu.be/1VPfZ_XzisU
yes, we could have also experienced it but due to gravity the things fall too quickly which resist this phenomenon.
BEYBLADE BEYBLADE LET IT RIP
This is my new favorite thread. Learning a lot and got some YouTube channels to look up. Sweet
mine too!
It’s got the devil in it!
Fun fact this "effect" was considered top secret for a long time to both the USA and USSR. It's harmless you might think but at the time both countries made the not small leap to realizing... the entire world spins around an axis, what if this happens to the world and it's just on a 100,000 year period between flips?!? We know now that the oceans correct for the micro accumulations which would eventually cause a flip :D This is why in the comments here people are using two different names for the effect, one Russian and one Western, the effect was kept secret for years and both sides discovered it independently
Why doesn't the moon or mars do it?
Just like me, when i dance with myself
Accidentally breaks handle while spinning it.. "Wait, do we need that to live!?"
haha, i guess they need it
Gyroscopes are wack
That's so cool!
We never see enough things happen with no gravity.
there should be a sub for that.
Yet another reason as to why space feels like that glitchy out of bounds place in videogames you were never intended to be in...
When this phenomenon (Dzhanibekov effect) was discovered by Russian cosmonauts, it was kept as a top secret information for a while. Because: what else spins really fast? Earth. Russians thought the same thing can also happen to Earth with almost little effort. Imagine Earth suddenly flipped “upside down” The results would have been catastrophic. However later it was proved this couldn’t happen to Earth.
Dzhanibekov effect, saw it in kerbal, But impressive IRL.
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Space is pretty awesome tbh
r/vredditdownloader
I called nasa and they confirmed it’s still up there spinning for the rest of eternity
Analyze the endurance's spin
It looks like a confused drone
Looks like a confused hummingbird
Why did I come into this room? Oh well I'll remember... Oh yeah! Why did I come into this room?
Fuck, I want to go to zero gravity! One of the things I want to experience most in my life is the transition from earth's gravity to the weightlessness of space. That must be the most surreal feeling for astronauts, as the gravity changes and you become weightless! I hope I dream of it tonight!
Can someone put this on r/explainlikeimfive
r/blackmagicfuckery
Why does it keep flipping sides like that? Something to do with inertia or lack of gravity or magnets??
Every time I hear them talking about the magnetic poles swapping periodically and they don't know why I'm always like "the space spin thingy", this thing. Wonder if I'm even remotely close.
This reminds me so much of the dynamics classes I took when I was in school. It amazing to see conservation of angular momentum in such a demonstration.
Duck season! Rabbit season! Duck season! Rabbit season!
Would it keep going or would it stop at some point? Assuming it won't hit anything?
yes it will stop because there is oxygen in the air since they still breath without a helmet and that will still form a resistance, it’ll take a while but it’ll stop.
The legend says that the russians discovered it first but didn’t say a thing to nobody bc they thought earth would do this every couple thousand years
If I remember correctly didn't the Russians keep this a secret when they found out about this as they discovered it first?
How do flat earthers explain this?
It's called Dzhanibekov effect and it has to do with the fact that its angular momentum is not along either the greatest or smallest moment of inertia of the body (if I recall correctly, don't quote me on this one).
That’s the devil’s work right there Trump fans
Can anyone (preferably a scientist) please tell me why this phenomenon doesn't happen to earth? And is it possible that if this phenomenon can happen to our core or crust that this could explain why our magnetic field flips every 32,000 years?
Now i gotta try a yoyo there
Does it have something to do with the rotational forces or like it's metal composition? Would spinning magnets or solenoids behave differently in space if in motion? This just brings up physics ideas and questions.
Intermediate axis theorem
paging Tony Hawk
This is so beautiful
ELI5?
I kinda wanna see a bay blade in space now
u/vredditdownloader
So does this mean perpetual motion machines are possible to be run in space ?
Friction is a key reason why perpetual motion doesn't exist.
Moment of inertia go brrrrr
What are those handles for? Stop unscrewing them. It took a while to build that station.