NASA just spotted a massive hole growing on the sun — here’s what it means (Video)

This imagery of the sun captured by NASA’s Solar Dynamics Observatory from May 17-19, 2016, shows a giant dark area on the star’s upper half, known as a coronal hole. Coronal holes are low-density regions of the sun’s atmosphere, known as the corona. Because they contain little solar material, they have lower temperatures and thus […]

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