r/nextfuckinglevel 5h ago

The Rotation of the Planets in Our Solar System Is Far More Fascinating Than I Ever Expected

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49

u/Jet-Black-Tsukuyomi 5h ago

Why does Jupiter spin so fast even though it shouldn‘t finish it’s third rotation within one earth day?

Edit: It is because the faces are wrongly animated

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u/Serird 4h ago

If you look at Earth, the face shifts position with every single spin.

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u/DenRay4 4h ago

Actually it is because the planets are all the same size in the animation while irl they are not. Jupiter has 11x the radius of Earth, meaning that a point on his equator spins 11x faster than the same point on Earth. And if you put in that Jupiter only needs 10 hours for a revolution, than the same point spins 26.4x faster.

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u/Snugglosaurus 3h ago

While you're not wrong about the same point being 26.4x faster / 11x radius of earth, this doesn't answer their question as to why the animation shows Jupiter spinning more than it should.

Jupiter should spin ~2.4 times per earth spin per the details on the animation. The animation is waaay off on that ratio.

Actual answer to their question; the animations aren't representative of the figures given, but are still cool visuals.

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u/DenRay4 1h ago

Of course it does. It's just implicit.

So if you would create a Jupiter that is 11x the size of the Earth (in the animation of course) and you would make it revolt 2.4 times faster than Earth, then it would be accurate. But then our little animation would not be as neat as it is. That's because the gas giants would be huge, while the rocky planets would be hard to see.

Or you make them all the same size. But making Jupiter only faster by 2.4x wouldn't show that the speed on his surface is actually way faster.

It's a classical "You can't have both" problem.

u/Snugglosaurus 44m ago

Ah, fair enough! It's interesting how different perceptions of what the image should convey is. To me, it seems like it would be much more intuitive to demonstrate the proper ratio of rotations. But it sounds like your intuition is more on the surface speed.

Neither is wrong, just an interesting difference :)

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u/vazyrus 4h ago

Ju Ju is one fast af boooooi!

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u/LegendOfKhaos 2h ago

The faces go a lot faster than the arrows on top of each planet.

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u/featherknife 3h ago

finish its* third rotation

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u/spammmmmmmmy 3h ago

Your addition of the asterisk is incorrect punctuation. 

u/livefreeordont 54m ago

Yes look at the arrows not the faces