NASA Detects Massive Polar Cyclone on Uranus

The discovery of a swirling vortex at Uranus' north pole was made using radio telescopes.
The cyclone spans a quarter of Earth's diameter and is locked above the planet's pole.
Uranus is an ice giant with an unusual axial tilt and a blue-green atmosphere of methane.
Every planet in the solar system with a substantial atmosphere has been found to have polar cyclones.
Uranus remains puzzling to scientists, who hope to learn more from observing the distant planet.