When you imagine Jupiter, you probably see a planet with orange and reddish stripes and the famous Great Red Spot staring at you like a giant eye.
But did you know that famous bands always change size, color and location? Every four to five years, Jupiter changes its alignment, and ever since Galileo Galilei observed it in the 17th century, scientists have wondered why.
What we do know is that each band, consisting of clouds of ammonia and water in hydrogen and helium atmospheres, corresponds to strong winds blowing east or west. Scientists also linked the bands, which reach depths of more than 1,000 miles (1,600 kilometers) in Jupiter’s atmosphere, to changes in infrared variations within the planet. But the research team just discovered another important clue, and it all came down to Jupiter’s magnetic field.
Related: Jupiter, the largest planet in the solar system (photo)
Using data from NASA’s Jupiter-orbiting Juno spacecraft, the team correlated variations in the gas giant’s bands with changes in its magnetic field.
“It is possible to obtain wave-like movements in the planet’s magnetic field, called torsional oscillations. The interesting thing is, when we calculate the period of these torsional oscillations, they correspond to the periods you see in the infrared radiation on Jupiter. ,” study co-author Chris Jones, a professor at the School of Mathematics at the University of Leeds in England, said in a statement.
In the world of science, this discovery creates even more mystery.
“There are still uncertainties and questions, in particular how exactly torsion oscillations produce the observed infrared variations, which likely reflect complex dynamics and cloud/aerosol reactions. This requires further research,” lead study author Kumiko Hori, formerly of the University of Leeds and currently of Kobe University in Japan, said in the same statement.
“Nevertheless, I hope that our paper can also open a window to probe the hidden interior of Jupiter, just as seismology does for the Earth and helioseismology does for the sun,” Hori said.
The team’s research was published May 18 in the journal Nature Astronomy.
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2023-10-23 22:22:22
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