Mistaken?
So a guy in the 1600s sees what he thinks is a big red spot on Jupiter, which we later found has a big red spot on it, and we now believe he was mistaken why exactly? If he had claimed to see two of them, or a green spot, I could see it, but that's a fairly specific observation...
Especially if it has shrunk in the past 100 years, who knows how big it could have been 350 years ago?
Biting the hand that feeds IT
