Interactions among the sun's magnetic field lines create intense bursts of energy in the solar corona, reaching temperatures of 20 million K or higher, much hotter than the sun's core at 15 million K.
The sun's corona is about one to two million degrees Celsius overall, significantly hotter than the sun's surface at 6,000 degrees C, attributed to magnetic activity in creating the superheated atmosphere.
Solar eclipses are one of the best methods for studying the sun's atmosphere as they allow telescopes on Earth and satellites to use a coronagraph, revealing parts of the solar atmosphere without blocking its surface.
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