Best Space Photos of the Week: Blue Fire, Raindrop Dunes

Blue Fire

Image courtesy STEREO/ESA/NASA

Resembling a fiery blue marble, the sun is captured in this dramatic extreme-ultraviolet-light image by NASA's STEREO spacecraft on September 27.

While the sun is at its maximum level of activity on its 11-year sunspot cycle, its surface the past month appears strangely quiet, with few solar storms and nearly no brighter active regions.

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