Movies reveal the restless nature of shadowy regions in the planet's atmosphere and the force behind them.
Jupiter is a planet known for clouds, from its distinctive orange and white stripes to the swirling vortex known as the Great Red Spot. But its cloudless patches are just as interesting—and so unusual that the big ones get the special name "hot spots." Exactly how they form and why they're only found near the equator have long been mysteries. To study hot spots in motion, scientists made movies from images taken when NASA's Cassini spacecraft flew past the planet in 2000. The movies reveal new evidence that Jupiter's hot spots are created by an atmospheric phenomenon known as a Rossby wave. As the wave glides up and down in Jupiter's atmosphere like a horse on a merry-go-round, it creates holes in the clouds by displacing cold air. This results in a line of cloud-free warm air pockets, or hot spots, seen around the planet. Watch the video to learn more.
Please give credit for this item to: NASA's Goddard Space Flight Center Cover and Cassini image courtesy of NASA/JPL/Space Science Institute Other images courtesy of NASA/GSFC/JPL/Space Science Institue
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