New beauty shots of Jupiter, captured by the James Webb Space Telescope, reveal a speedy jet stream encircling the equator at an altitude never imaged before.
Researchers have known about Jovian jet streams since Voyager spacecraft flew by in 1979. Those relatively stable winds occur near the planet’s main cloud decks, in the troposphere. The newly spotted jet lies 20 to 40 kilometers above, in the stratosphere, and moves at about 500 kilometers per hour, or roughly twice as fast as the jets below, astrophysicist Ricardo Hueso and colleagues report October 19 in Nature Astronomy.
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