NASA just spotted a massive hole growing on the surface of the sun — here’s what it means

Business Insider
By Kevin ReillyDec 6, 2016, 5:30 pm250 pts
NASA's Solar Dynamics Observatory just spotted a massive hole on the sun surface called a coronal hole. The hole appears black because it's cooler than its surroundings, and is responsible for high-speed solar winds that can sometimes disrupt satellite and radio communication satellites. Video courtesy of NASA…

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