Jupiter's Great Red Spot is a vast, persistent storm observed across centuries, yet important questions remain. Explore what spacecraft and telescopes reveal about its winds, depth, color and changing size. Inside this episode: - A storm without solid ground - How large is it - The winds around the edge - How deep does it go - Why is it red Sources include NASA, Juno results offer first 3D view, JPL, Measuring the Gravity of Jupiter's Great Red Spot, and NASA, Hubble watches the Great Red Spot. This episode is a researched narrative summary. Historical records may be incomplete, translated differently, or interpreted differently by scholars. We distinguish documented facts, estimates, disputed interpretations, and later stories where material. Corrections are logged and incorporated into future editions. Follow Solar System Field Notes for more ...