Not only is the planet’s famous Great Red Spot shrinking in size, but cloud movement in the northern hemisphere indicates that a major storm is brewing.
A stunning photo shot in visible light was obtained by Hubble from a distance of 406 million miles, states NASA. The near-infrared imaging and ultraviolet views highlight the distribution of meteorological phenomena like never before, giving researchers an entirely new perspective on Jupiter’s evolution.
The Great Red Spot, the most famous of Jupiter’s storms, rotating counterclockwise, is estimated to have been raging for upward of 350 years, says Business Insider.
Currently, the Great Red Spot measures 9,818 miles in diameter, but scientists believe that it is shrinking. For context, it is still large enough to swallow the planet Earth, which measures 7,917.5 miles in diameter.
A brewing storm in the planet’s northern hemisphere, however, has piqued curiosity for its sudden appearance and ferocious speed. Erupting on Aug. 18, 2020, at mid-latitudes, this bright white rolling storm, trailed by anticlockwise cyclones, has gathered speeds of around 350 miles per hour.
According to Hubble‘s website, this storm may have more structure behind it than previous weather disturbances on planet Jupiter. The small plumes trailing the head of the storm suggest that this may be the beginning of a longer-lasting tumult in the northern hemisphere, comparable to the Great Red Spot.
Scientists also suspect that the storm’s embryonic formation may belie its age; this weather disturbance could have been brewing for some time. NASA noted that it was “perfect” timing to capture the formation of this northern hemisphere storm structure in its early stages.
Another notable storm in the planet’s southern hemisphere, below the Great Red Spot and about half its size, Oval BA or “Red Spot Jr.,” appears to be changing in color from white to red.
Oval BA, younger than the Great Red Spot, formed in the late 1990s from three smaller storms, and its cumulative force has been growing ever since then. Scientists first noticed that the storm was changing color in 2006, and according to Hubble’s photographic monitoring over the years, its color regularly fluctuates between white and red.
In one rendering of Hubble’s extraordinarily detailed image from Aug. 25, Jupiter’s ice moon, Europa, can be seen crisply illuminated next to the giant planet.
Europa is believed to be concealing a liquid ocean under its icy crust. For this reason, according to Hubble’s website, the moon is one of the major targets in the search for “habitable worlds” beyond our planet.
The ESA’s anticipated 2022 mission, JUpiter ICy moons Explorer, hopes to explore Jupiter and three of its largest satellites, Ganymede, Callisto, and Europa.
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