A polar cyclone is swirling on Uranus, further showing that the planet's atmosphere is a hive of hidden activity.
A vortex of relatively warm air has been detected swirling beneath Uranus' clouds, providing strong evidence for the existence of a cyclone anchored at the planet's north pole.
When Voyager 2 encountered Uranus, it detected changes in wind speeds, which can reach 560 mph , at the planet's south pole and which are consistent with the existence of a polar vortex there. However, Voyager 2 did not get a view of the planet's north pole to see if there was a vortex there, too. Compounding this lack of up-close data, observing either of Uranus' poles from Earth has been difficult until recently.
"These observations tell us a lot more about the story of Uranus," Alex Atkins of NASA's Jet Propulsion Laboratory in Southern California, who led the observations, said in a statement."It's a much more dynamic world than you might think."
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