Changes in solar activity influence the color and formation of clouds around the planet, researchers at Oxford and Reading universities found. The icy planet is second furthest from the sun in the solar system and takes 84 Earth years to complete a full orbit – one Uranian year. The researchers found that, once the planet’s long and strange seasons are taken into account, it appears brighter and dimmer over a cycle of 11 years. This is the regular cycle of solar activity which also affects sun spots.
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