"The Hubble telescope has spotted a huge shimmering region of Uranus – and it’s caused by powerful bursts of solar wind."
According to Deborah Byrd at EarthSky, every planet in the Solar System except Mercury has auroras. The spectacular and eerie bursts of light occur when the upper atmosphere gasses like nitrogen or oxygen interact with strems of charged particles. These particles can come from a variety of source, including solar winds, the planet's ionosphere (the layer of the atmosphere charged by solar or cosmic radiation), or an unusual process called "moon volcanism" (where the moon's volcanic activity emits charged gasses that carry an electrical current along to the planet's atmosphere).
So what exactly does that all mean?
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