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This is what Saturn's interior should look like

Data from the Cassini spacecraft and powerful computer simulation models help define the internal composition of Saturn, the most fascinating of the planets in our solar system.

May 6, 2021
Gianluca RiccioGianluca Riccio
⚪ 3 minutes
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Saturn

The interior of Saturn with an insoluble layer of stably stratified helium.

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The models, published this week on AGU Advances, indicate that Saturn's interior may have higher temperatures in the equatorial region, with lower temperatures at high latitudes at the top of the helium rain layer.

It is notoriously difficult to study the internal structures of large gas planets, but one study advances the effort to map Saturn's hidden regions.

By studying how Saturn formed and how it evolved over time, we can learn a lot about the formation of other similar planets within our solar system and in other systems.

Sabine Stanley, study co-author and Johns Hopkins planetary physicist

Saturn, a "particular subject"

Saturn stands out among the planets of our solar system because its magnetic field appears to be almost perfectly symmetrical around the axis of rotation. Measurements collected from the latest orbits of NASA's Cassini mission give us a better understanding of what the inner part of the planet can be like, says lead author Chi Yan, Ph.D. of Johns Hopkins.

Saturn
Saturn's magnetic field seen on the surface. Credits: Ankit Barik / Johns Hopkins University

By feeding data collected by the Cassini mission into powerful computer simulations similar to those used to study weather and climate, Yan and Stanley explored the ingredients needed to produce the "electromagnetic mix" that could explain Saturn's magnetic field.

Saturn in X-rays

"One thing we found was the sensitivity of the model to very specific things. Like temperature," says Stanley. "And that means we have a really interesting view of Saturn's deep interior up to 20.000 kilometers deep. It's like looking at a planet under X-rays."

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Surprisingly, Yan and Stanley's simulations suggest that a slight degree of non-asymmetry may actually exist near Saturn's north and south poles.

Saturn
The interior of the planet with an insoluble layer of stably stratified helium.

To confirm the model, a direct observation of Saturn's poles would be needed. And, combined with this model, it could answer another question that has captivated scientists and experts for decades space exploration: how fast does Saturn rotate?

In other words: how long does a day on the "Lord of the Rings" last? The arduous discovery for the next researchers.

Tags: space explorationSaturnProbe

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