No, Jupiter’s Great Red Spot is not disintegrating, physicist claims

Earlier this year, several amateur astronomers spotted an unusual anomaly on the planet Jupiter: bits of the gas giant’s famed Great Red Spot appeared to be flaking off, raising fears that the planet’s most identifiable feature might be showing signs of disappearing. But Philip Marcus, a physicist at the University of California, Berkeley, begs to differ. He argues that reports of the red spot’s death have been greatly exaggerated, and at a meeting of the American Physical Society’s Division of Fluid Dynamics in Seattle this week, he offered an intriguing counter-explanation for the flaking.

The Great Red Spot is basically a gigantic storm in Jupiter’s atmosphere, about 22 degrees south of the planet’s equator. Because it’s located in the southern hemisphere, it rotates counter-clockwise, meaning it’s more of an “anti-cyclone.” The 17th-century scientist Robert Hooke is commonly credited with the first recorded observation of the red spot in 1664, although some contend Giovanni Cassini provided a more convincing description in 1665. After 1713, there were no reported observations for over 100 years, until the red spot was observed again in 1830 and continually thereafter. Despite the gap in recorded observations, many astronomers believe it’s the same storm, still going strong more than 350 years later.

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