In Jupiter's Great Red Spot, a wind is rising

Jupiter’s enormous Great Red Spot, a huge elliptical rotating storm that has persisted for centuries (at least!) has been undergoing some weird changes over the past few decades. Its color has changed, and it’s been shrinking, too. Now, new results from 11 years of Hubble Space Telescope observations show that the wind speeds around the Spot have increased significantly, too.

Why? That’s not clear (get used to that phrase). Like so many things about this ridiculously huge maelstrom, it’s not un...