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#Intermediate Axis Theorem Reel by @veritasium_daily (verified account) - The bizarre behaviour of rotating bodies - Part 1 What you are looking at is known as the Dzhanibekov effect or the tennis racket theorem or the inte
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@veritasium_daily
The bizarre behaviour of rotating bodies - Part 1 What you are looking at is known as the Dzhanibekov effect or the tennis racket theorem or the intermediate axis theorem. It involves arguably the best mathematician alive, Soviet era secrets, and the end of the world. So in 1985, cosmonaut Vladimir Dzhanibekov was tasked with saving the Soviet space station Salyut 7 which had completely shut down. The mission was so dramatic that the Russians made a movie out of it in 2017 and after rescuing the space station, Dzhanibekov unpacked supplies sent up from Earth which were locked down with a wing-nut and as the wing-nut spun off the bolt, he noticed something strange: The wing-nut maintained its orientation for a short time, and then it flipped, 180 degrees. And as he kept watching, it flipped back a few seconds later and it continued flipping back and forth at regular intervals. This motion wasn’t caused by forces or torques applied to the wing-nut: there were none. And yet it kept flipping. It was a strange and counterintuitive phenomenon. One that the Russians kept secret for 10 years. But why the secrecy? - Answer Coming In Part 2 6 years later in 1991 a paper was published in the Journal of Dynamics and Differential Equations called, “The Twisting Tennis Racket” and although it was related, it of course makes no mention of the secret Dzhanibekov effect. The paper says if you hold a tennis racket facing you, and then flip it in the air like this, it not only rotates the way you intend it to, it also makes a half turn around an axis that passes through its handle so the side that was originally facing you will be facing away when you catch it. Hosted by Derek Muller Written by Derek Muller #physics #science #veritasium #math #engineering #experiment #cosmonaut #dzhanibekoveffect #tennis
#Intermediate Axis Theorem Reel by @learn_something_new_every_day_ - @LeSNE(2388)....This occurs when the object is rotating around its intermediate axis of inertia, a behavior known as the tennis racket theorem or inte
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@LeSNE(2388)....This occurs when the object is rotating around its intermediate axis of inertia, a behavior known as the tennis racket theorem or intermediate axis theorem. . Follow to Learn Everyday @learn_something_new_every_day_ @learn_something_new_every_day_ @learn_something_new_every_day_ Share if this is a new information for you. . #iss #astronaut #science #space #cosmos #learn_something_new_everyday_ #learn_something_new_every_day_
#Intermediate Axis Theorem Reel by @curiousclipsdaily - The flipping T-shaped object in space, commonly observed with a wing nut, is known as the Dzhanibekov effect or the Intermediate Axis Theorem. It is a
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@curiousclipsdaily
The flipping T-shaped object in space, commonly observed with a wing nut, is known as the Dzhanibekov effect or the Intermediate Axis Theorem. It is a physics phenomenon where an object spinning in microgravity along its intermediate axis of inertia unexpectedly flips 180° every few rotations before flipping back, due to inherent instability. Soviet cosmonaut Vladimir Dzhanibekov discovered the effect in 1985 while viewing a wing nut unscrewing on the Salyut 7 space station. The flipping occurs because rotation around an object's middle moment of inertia is unstable, causing small, inevitable imperfections in the spin to magnify, leading to the flip. In this video, the ESA astronaut Sophie Adenot demonstrated the Dzhanibekov effect by spinning a T-handle wrench (specifically a speeder handle) in microgravity from the International Space Station (ISS).
#Intermediate Axis Theorem Reel by @spaceagency.blog - Instead of rotating smoothly, the object periodically flips its orientation without any external force acting on it. This phenomenon is also known as
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Instead of rotating smoothly, the object periodically flips its orientation without any external force acting on it. This phenomenon is also known as the Tennis Racket Theorem or the Intermediate Axis Theorem and becomes especially clear in the near-frictionless environment of space. #DzhanibekovEffect #IntermediateAxisTheorem #TennisRacketTheorem #PhysicsInSpace #Microgravity #ISSScience #RotationalDynamics #SpacePhysics
#Intermediate Axis Theorem Reel by @stellersphereglobal - The T-shaped object you're referring to is likely the spinning T-handle (or wing nut) that demonstrates the Dzhanibekov effect, also known as the Inte
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@stellersphereglobal
The T-shaped object you're referring to is likely the spinning T-handle (or wing nut) that demonstrates the Dzhanibekov effect, also known as the Intermediate Axis Theorem. Why It Flips In the microgravity of space, this instability becomes clearly visible: The "Glitch": As the handle spins, any tiny disturbance causes it to periodically flip 180 degrees and then back again at regular intervals. • The Physics: This happens to conserve both angular momentum and kinetic energy. Mathematically, it is described by Euler’s Equations for rigid body dynamics. • Discovery: It is named after Soviet cosmonaut Vladimir Dzhanibekov, who noticed a wing nut behaving this way on the Salyut 7 space station in 1985. Everyday Examples You can actually see this on Earth, though gravity and air resistance make it shorter-lived: • Tennis Rackets: If you try to flip a tennis racket by its handle, it will almost always twist mid-air rather than doing a clean flip—a behavior known as the Tennis Racket Theorem. • Smartphones: If you toss your phone to flip it end-over-end (around its middle axis), it will usually add a "wobble" or twist as it turns.
#Intermediate Axis Theorem Reel by @universiauni (verified account) - Physics, but make it magic. 🌀✨🚀🛰️🌌🏗️ Astronaut Sophie Adenot demonstrates the mind-bending Dzhanibekov Effect (Intermediate Axis Theorem) from t
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@universiauni
Physics, but make it magic. 🌀✨🚀🛰️🌌🏗️ Astronaut Sophie Adenot demonstrates the mind-bending Dzhanibekov Effect (Intermediate Axis Theorem) from the International Space Station. The Stable vs. The Unstable: Every 3D object has three ways it can spin. Long Axis: Like a pencil spinning on its tip. (Stable) Short Axis: Like a coin spinning on a table. (Stable) Intermediate Axis: Like a book flipping end-over-end. (Unstable) When Sophie spins the T-handle around that "middle" axis, the physics becomes chaotic. The object can't decide how to distribute its energy, so it flips 180 degrees, stays there for a moment, and then flips back. The Soviet Secret: Discovered by cosmonaut Vladimir Dzhanibekov in 1985, this phenomenon was actually classified by the Soviet Union for years. Scientists were genuinely worried that if the Earth which is a rotating body experienced a similar instability, our North and South poles might suddenly swap, leading to a global disaster. Why Earth is Safe: Thankfully, Earth is almost a perfect sphere (with a slight bulge at the equator), which means we only have a "Major" and "Minor" axis. We lack the "Intermediate" axis that causes this flipping motion. Our planet is mathematically "locked" into a stable spin. 2026 Status: As of today, Thursday, April 30, 2026, engineers are using this math to perfect the stability of Artemis lunar modules. By ensuring the weight is distributed correctly, they prevent the spacecraft from "tumbling" like this T-handle during engine burns, keeping the astronauts safe and on course for the Moon. The universe follows a strict set of rules, even when it looks like it’s breaking them. 🔭💎 ✨ Does seeing a solid object flip itself over make you feel like the universe is a simulation, or just really well-designed? Tag a science fan! 👇 #universia #physics #dzhanibekoveffect #iss #esa nasa sciencefacts stargazing exploration mechanics cosmos relatable 2026
#Intermediate Axis Theorem Reel by @explanationeverything - This looks like a glitch… but it's pure physics! The Dzhanibekov Effect is one of the strangest behaviors in rotational physics. A spinning object ca
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@explanationeverything
This looks like a glitch… but it’s pure physics! The Dzhanibekov Effect is one of the strangest behaviors in rotational physics. A spinning object can suddenly flip 180 degrees mid-rotation, then flip again later — even though no external force is applied. This phenomenon was first noticed in space by cosmonaut Vladimir Dzhanibekov, when a spinning nut unexpectedly reversed its orientation while floating in zero gravity. Because of this, the effect was named after him. It’s also known as the Tennis Racket Theorem or the Intermediate Axis Theorem. Every 3D object has three rotation axes. Two of them are stable, while the middle one is unstable — like balancing on a knife edge. When an object spins around this unstable axis, even the tiniest disturbance breaks the balance. To conserve energy and angular momentum, the object flips over, repeatedly, in a predictable but surprising motion. This effect isn’t just a curiosity. It plays a critical role in the control and stability of satellites, spacecraft, and other rotating systems in space. #physics #dzhanibekoveffect #tennisrackettheorem #science #spacephysics
#Intermediate Axis Theorem Reel by @curiologist - The Tennis Racket Theorem, also known as the Intermediate Axis Theorem or the Dzhanibekov Effect, describes the phenomenon where a rigid body with thr
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@curiologist
The Tennis Racket Theorem, also known as the Intermediate Axis Theorem or the Dzhanibekov Effect, describes the phenomenon where a rigid body with three distinct principal moments of inertia exhibits unstable rotation around its intermediate principal axis. The theorem gained notable attention in 1985 due to a demonstration by Soviet cosmonaut Vladimir Dzhanibekov while aboard the Salyut 7 space station. Dzhanibekov observed and recorded that when he spun a wingnut around its intermediate axis, it would periodically flip its orientation, a counterintuitive and fascinating behavior. This effect is a direct consequence of the mathematics governing the rotation of rigid bodies. The phenomenon is particularly relevant in space where the absence of external torques allows such rotational behaviors to be observed without interference. #tennisrackettheorem #dzhanibekoveffect #physicsinaction
#Intermediate Axis Theorem Reel by @dark.matterhub - When rotation gets extreme, even simple motion can behave unexpectedly. This is the Tennis Racket Theorem (or intermediate axis theorem): when an obje
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@dark.matterhub
When rotation gets extreme, even simple motion can behave unexpectedly. This is the Tennis Racket Theorem (or intermediate axis theorem): when an object spins around its unstable axis, it can suddenly flip mid-rotation. In microgravity, like aboard spacecraft, there’s no air resistance to hide the effect—so the flip becomes perfectly visible. It’s a reminder that motion in space follows precise laws, even when it looks like reality is glitching. 🛰️✨ #Physics #ZeroGravity #SpaceScience #Rotation #ScienceFacts
#Intermediate Axis Theorem Reel by @gyanscience - The #Dzhanibekov effect, also known as the tennis racket theorem or intermediate axis theorem, is a surprising phenomenon in classical mechanics that
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@gyanscience
The #Dzhanibekov effect, also known as the tennis racket theorem or intermediate axis theorem, is a surprising phenomenon in classical mechanics that describes how a rigid object rotates. Here's the gist of it: Imagine an object, like a tennis racket or a weird-shaped nut, spinning in space. There are three main axes along which it can spin. The Dzhanibekov effect says that if you start the object spinning about its middle axis (the one with inertia in between the other two), it will actually wobble and flip over itself, ending up spinning about a different axis! This might seem counterintuitive, but it all boils down to the object's inertia – its resistance to changing its rotation. The middle axis offers an unstable equilibrium, and the object transfers its energy to achieve a more stable spin on a different axis. Here are some #interesting things to know about the Dzhanibekov effect: It was discovered by #Soviet cosmonaut #Vladimir Dzhanibekov in the 1980s while he was on a #space mission. He noticed a wingnut behaving strangely in #microgravity. The effect was actually known mathematically for over 150 years before Dzhanibekov observed it in space. You can easily see the Dzhanibekov effect yourself by spinning a tennis racket or any T-shaped object. You'll see it wobble and flip as it finds a more stable spin axis.
#Intermediate Axis Theorem Reel by @mysteries_of_universe_ - In 1985, Vladimir Dzhanibekov commanded a mission to repair the Salyut 7 space station. During the operation he flicked a wingnut to remove it from a
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@mysteries_of_universe_
In 1985, Vladimir Dzhanibekov commanded a mission to repair the Salyut 7 space station. During the operation he flicked a wingnut to remove it from a bolt. As it left the bolt it continued spinning in the vacuum of space, but every few seconds it turned over completely and then flipped back again. Nothing was touching it. No forces were acting on it at all. He stared at it for a long time. Then he quietly worried about Earth The phenomenon is called the Intermediate Axis Theorem, also known as the Tennis Racket Theorem. Every rigid object has three axes it can spin around. Rotation around the longest axis is stable. Rotation around the shortest axis is stable. But rotation around the middle axis, the intermediate one, is fundamentally, mathematically unstable. Even in the perfect vacuum of space, free from gravity and air resistance, spinning around the intermediate axis causes the object to wobble and then flip. It is not mechanical failure. It is not interference. The mathematics of rotation itself makes it inevitable. This is not just a curiosity. It already caused real problems in space. Explorer 1, the first satellite launched by the United States in 1958, was designed to spin stably around its long axis. Instead it began tumbling uncontrollably because internal flexible elements dissipated energy until it settled into intermediate axis rotation. A theorem nobody had fully applied yet took down America's first satellite The effect Dzhanibekov discovered was classified by Soviet authorities for ten years. A spinning wingnut was considered a state secret CURIOUS FACT: The same effect was actually first observed in space in 1973 by American astronaut Owen Garriott aboard Skylab, twelve years before Dzhanibekov. His demonstration was documented but went largely unnoticed for decades 🔭 . . . . . . . . . . . . . . . . . [astronomy, space science, cosmos, curiosity, research, facts] #followformore #cosmos #universe #exploration #mysteries DM for credit or removal. No copyright intended. All rights to respective owners.
#Intermediate Axis Theorem Reel by @him (verified account) - Follow (me) 👉 @him for more content like this! The Dzhanibekov Effect is named after Soviet cosmonaut Vladimir Dzhanibekov, who noticed it during a
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@him
Follow (me) 👉 @him for more content like this! The Dzhanibekov Effect is named after Soviet cosmonaut Vladimir Dzhanibekov, who noticed it during a 1985 space mission when a wing nut he had loosened began repeatedly flipping over in microgravity. The observation was reportedly kept under wraps for a period due to concerns it might suggest instability in Earth’s rotational axis. In reality, the behavior is explained by the Intermediate Axis Theorem, a principle traced back to 18th-century work by Leonhard Euler. The effect appears striking in weightlessness, but Earth itself remains stable because its slightly bulged, near-spherical shape supports two stable rotational axes, preventing such a flip.

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