free and forced precession of Earth illustrated with a gyroscope

We use a gyroscope to demonstrate how Earth rotates with respect to the fix stars and explain forced and free precession.

Image Credits:

Earth texture:
Reto Stöckli, NASA Earth Observatory

ocean currents:
NASA/Goddard Space Flight Center Scientific Visualization Studio

tectonic plates:

Earth cross section:

tides:

[scottl]

The diagram showing both precessional rotation and the the nutation/obliquity within that precession is very helpful. thank you for that

[DreadEnder]

I like how the comments are;
1 year ago
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[__hannibaalbarca__]

Beauty of differential calculus mixed to mechanics and vector calculus.

[dembaba]

Which means that the GLOBE can only work on a flat earth base 🤐

[DesertSessions]

One thing is missing... The Earth's precession and rotational axis isn't steady. It's constantly being affected by outside sources and the earth isn't perfectly balanced

[stevenlaube]

your applying a force that induces a torque because of the mass momenta which effects every play , while the forces spoken of in earth are such induced torques because of to be simple an induction static/surface(as with a crystal ) charged arising from Birkeland current (as with a air core or iron core transformers )

[liftingtheveil]

The sun circles between the Tropics, 23.5 degrees North of the equator in the Tropic of Cancer and 23.5 degrees South of the equator in the Tropic of Capricorn.
All the celestial bodies are energy for earth and rotate above us, earth is level and stationary.
This can be observed by the 2d counterclockwise, clockwise and counterclockwise change in orientation of sun spots on it's diurnal circuit.
That is impossible looking at the sun 93 million miles away on a globe rotating West to East.

[PaulPukite]

Chandler wobble is caused by the moon's monthly nodal (Draconic) cycle interacting non-linearly with the annual cycle. The cycle is 365.25/13.606 modula 26 = 0.845/yr which is 433 days, the exact period of the Chandler wobble. This is an example of a forced response, not related to the inertial moment of the Earth. However, the frequency response of the natural resonance does help as it lies within the Q-factor bandwidth.

[michaelh]

I like the experiment done on the International Space Station much better.

[ericphantri]

Thanks students would like this better than reading because most had no tool nor access to lab equipment

[cmzmenl]

The direction of angular momentum can use the right hand to indicate. So the direction of arrow in the video is wrong.

[jedisdad]

This is the BEST EXPLANATION FOR CLIMATE CHANGE.

[ericpham]

That's why any spining like car truck wheel and generator and generator push earth in the billion of small vectors add up big vector

[LCKRD-unrx]

Absolutely 💯# Heliocentrism is not based in actual reality.

[philoso]

On page 1:10 and up.
Note the spin rate and precession rate ratio. Do we think this represents the same ratio with earth’s precession?

Earth precession is 1-degree every 72 years. One precession cycle takes 360x72x365 days or 9, 460, 800 earth spin cycles in each precession.

Congratulations to this demonstration. In this video we saw a precession, not sure this represents earth’s precession.

[canadianbacon]

Why can't gyroscopes detect earth curvature when planes fly 1000's of miles?

[jnswarrior]

Eu estudo a Precessão da órbita lunar e a sua ligação com os cataclismos q vão ocorrer nos próximos anos, devido a Precessão da órbita lunar para 28° de latitude, a velocidade da lua com relação ao Equador terrestre aumenta deixando o clima mais agitado q o normal, como aconteceu em 2005, furacão katrina, e terremotos fortes também em 2005 e 2006, ótima explicação.

[MadSceintist]

That's exactly what is going to happen again when the earth is hit by another asteroid or foriegn body. The earth is going to vibrate the continents into California becoming an aquarium

[glennrobards]

Anyone that claims that the earth is rotating is lying!
Take me to court if you're not a liar.

[juanverdez]

Did "physics" invented any big-small water duality? I mean, little water has the same properties like a lot of water, or has not?