Scientists Uncover the Secret of Saturn After Years of Puzzlement

SadaNews - Astronomers have finally succeeded in solving one of the most puzzling mysteries associated with the planet Saturn, after observations made by the "James Webb" space telescope revealed that the changes observed in the planet's rotational speed were not due to actual acceleration or deceleration, but rather a complex phenomenon linked to auroras and winds in its atmosphere.

According to a study published in the Journal of Geophysical Research: Space Physics, the auroras in Saturn's northern pole drive a continuous cycle of heating, winds, and electric currents, which leads to changes in the signals used to measure the planet's rotation speed, giving a misleading impression that its rotational rate is changing over time.

A Mystery That Lasted for Years

The scientific confusion began decades ago, but it resurfaced in 2004 when data from NASA's "Cassini" probe showed that Saturn's rotation speed appeared different from what was expected.

This was difficult to explain, as giant planets do not change their rotation rates over short periods. In 2021, a research team led by Professor Tom Stallard from Northumbria University in the UK suggested that the reason was related not to the planet itself, but to winds in its upper layers that affect the electrical signals associated with the auroras.

James Webb Settles the Debate

To verify this hypothesis, the researchers used the "James Webb" telescope to observe the northern auroral zone of Saturn over a full day on the planet.

The team relied on measuring the light emitted by a molecule known as "trihydrogen ion," which is a natural indicator of temperature in the upper atmosphere. The data allowed for the production of the most accurate maps to date of temperatures and the density of charged particles in the polar region.

The results showed that the energy emitted by the auroras heats specific areas of the atmosphere, generating strong winds that, in turn, produce electric currents that help sustain the auroras themselves in a self-sustaining loop.

More Than Just Beautiful Lights

Professor Stallard stated that what is happening is akin to a "planetary heat pump," where the auroras heat the atmosphere, generating winds, and resulting in electric currents that feed the auroras again.

He added that these observations have finally provided the missing evidence for scientists to understand the apparent changes in Saturn's rotation rate and close a file that has lasted for decades.

Implications Beyond Saturn

The significance of this discovery is not limited to Saturn alone, as the results indicate a close connection between the atmosphere and the planet's magnetic field, which may also occur in other worlds both inside and outside the solar system.

Researchers believe that understanding these interactions may help uncover new mechanisms governing the atmospheres of distant planets and their relationship with the surrounding space, opening new horizons for studying the evolution of planets and potentially habitable environments in the universe.