Nature Astronomy, Published online: 19 October 2023; doi:10.1038/s41550-023-02099-2

James Webb Space Telescope observations of Jupiter have unveiled the presence of a narrow and intense atmospheric jet in the equator of the planet near the tropopause. The jet’s speed of 500 km h−1 doubles the speed of the lower clouds. This new jet aligns with temperature and wind oscillations in Jupiter’s stratosphere.

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