BERKELEY, Calif. — In the cold, swirling clouds above Jupiter’s poles, scientists have spotted something odd: dark, oval-shaped vortices visible only in ultraviolet light that come and go like ghosts.

NASA’s Hubble Space Telescope keeps an eye on Jupiter’s Great Red Spot, a 10,000-mile-wide storm system that has been swirling for at least 190 years and possibly much longer. Recent data from the ...

There's a massive storm on Jupiter called the Great Red Spot. It swirls in the planet's Southern Hemisphere, spinning counterclockwise at speeds that are estimated to range from 430 to 680 kilometers ...