Is Jupiter's Great Red Spot an impostor? Giant storm may not be the original one discovered 350 years ago

A section of swirling world of gases of tans and browns and off whites with a giant storm of blood orange swirling in the top left.

In 1665, Italian astronomer Giovanni Cassini observed a giant dark spot on Jupiter, which he called the "Permanent Spot." (English scientist Robert Hooke might've discovered it a year earlier, in 1664, but I digress.) Though astronomers mysteriously lost track of the spot for centuries, we've always thought that the original "Permanent Spot" might be the Great Red Spot — a massive storm on Jupiter's surface — we know and love today.

Well, we were wrong. A new study of the Great Red Spot suggests it most likely is a newer, younger storm.