Strange things are happening on Jupiter, and scientists believe they have the answer

Researchers have observed mysterious dark ovals, each approximately the size of Earth, appearing in Jupiter’s polar regions in the ultraviolet spectrum. Yes, remember that Jupiter is much larger than our small planet.

The gas giant, whose Great Red Spot has been baffling astronomers for centuries, has an extremely powerful magnetic field that, according to scientists, could be behind this strange phenomenon.

As detailed in a new article published in the journal Nature Astronomy, a group of scientists supported by NASA concluded that disturbances high in the planet’s atmosphere can cause the appearance of these dark spots in ultraviolet observations.

What's that black spot on Jupiter? No one is sure. During one pass of NASA's Juno over Jupiter, the robotic spacecraft imaged an usually dark cloud feature informally dubbed the Abyss. Surrounding cloud patterns show the Abyss to be at the center of a vortex. Since dark features… pic.twitter.com/Becef4TiSQ

— Astronomy Picture Of the Day (@apod) November 4, 2024

In the depths of the planet’s atmosphere, very powerful forces are at work

Although the ovals were detected for the first time in Hubble observations in the late nineties, the team claims to have found the reason for their appearance: they suggest that magnetic tornadoes in the upper atmosphere could be stirring the stratospheric haze, causing the formation of these unusual features near Jupiter’s north and south poles.

These ovals appear dark in the UV observations made by NASA’s Hubble Space Telescope, as part of the Outer Planet Atmospheres Legacy (OPAL) project, because they absorb more ultraviolet light than their surroundings.

It is possible that the phenomenon is not limited to the upper part of the gas giant’s atmosphere. According to the researchers, the existence of the ovals suggests that very powerful forces are at work deep within the planet’s atmosphere.

1/2
So great achievement!

Using 26 global maps of Jupiter, obtained by Hubble between 1994 and 2022, UC Berkeley astronomers have detected transient ultraviolet dark ovals at the planet's north and south poles.

Ovals at the south pole are 4 to 6 times more common than ovals… pic.twitter.com/Iar5zZfEl8

— Nereide (@Nereide) November 28, 2024

“In the first two months, we realized that these OPAL images were like a gold mine, in a sense, and very quickly I was able to build this analysis pipeline and send all the images through to see what we get,” said UC Berkeley undergraduate student and co-author Troy Tsubota in a statement.

Tsubota and his collaborators suggest that the deepest point of these vortices within the planet’s ionosphere may be stirring Jupiter’s hazy atmosphere and sending it upwards in a manner similar to a tornado, causing these ovals to form for about a month before dissipating.

The team hopes to shed more light on how atmospheric dynamics differ between Earth and Jupiter. The gas giant has always been a mystery to us, but we are gradually getting to know it better as our measuring instruments improve.