Cassini snaps Saturn’s strange polar vortex during daring dive

The bizarre vortex spinning at Saturn’s north pole takes center stage in a newly released photo by NASA’s Cassini spacecraft.

The probe snapped the photo on April 26, the same day it began its “Grand Finale” phase of daring dives between Saturn’s cloud tops and the planet’s innermost rings.

“Although the pole is still bathed in sunlight at present, northern summer solstice on Saturn occurred on May 24, 2017, bringing the maximum solar illumination to the north polar region,” NASA officials wrote in a description of the photo, which was released Monday (Aug. 28). “Now the sun begins its slow descent in the northern sky, which eventually will plunge the north pole into Earth years of darkness.” [See More Photos of Saturn’s Bizarre Hexagon Storms]

It takes Saturn about 29 Earth years to orbit the sun, so seasons on the gas giant and its many moons each last more than seven Earth years.

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Cassini was about 166,000 miles (267,000 kilometers) from Saturn when it took the picture, NASA officials said.


Saturn’s north polar vortex sits at the center of a 20,000-mile-wide (32,000 km) hexagonal jet stream whose winds travel at about 200 mph (320 km/h). The vortex photo is too zoomed-in to show Saturn’s hexagon, which resembles nothing else known in the solar system.

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