As our solar system moves closer to the sun, temperatures in the atmosphere of the sun, known as the corona, are becoming increasingly hot. Scientists have long known that the sun’s corona is heated to millions of degrees, but a new study has revealed more about the mechanism behind this phenomenon. The study, published in Nature Astronomy, shows that the heat in the corona is generated by small-scale magnetic activity, rather than the large-scale structures that have been previously thought to be responsible. This discovery could provide insight into the processes that drive solar activity and could help us better predict and understand the effects of space weather.

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source: Phys.org