This is the highest resolution image ever recorded of Jupiter's temperature field. Galileo obtained it during its seventh orbit, in the vicinity of Jupiter's Great Red Spot.
The image on the bottom panel indicates the forces powering Jovian winds, and differentiates between areas of strongest upwelling and downwelling winds in the upper part of the atmosphere.
The upper panel shows the visible clouds in a Hubble Space Telescope Planetary Camera colour composite image of the same part.
Many of Galileo's atmospheric observations targeted specific Jovian cloud features, including the Great Red Spot.
The spot has existed for at least a hundred years -- perhaps longer. The great Galileo Galelei reported seeing a similar feature nearly 400 years ago. Three Earths could fit across the Great Red Spot.