Our sun is the best-observed star in the entire universe...we have yet to really observe the polar regions that are key to learning about the sun's inner magnetic structure.
At its surface, the sun is a toasty 6,000 degrees Celsius. But the outer layers of its atmosphere, called the corona, can be a blistering-and perplexing-1 million degrees hotter.
To solve this and other mysteries, we needed a sun-grazing space probe...that shows us how small-scale magnetic activity.
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