SMRTR Science & EngineeringOct 29, 2025Live Science

Mystery of the sun's mind-bogglingly hot atmosphere may finally be solved

SMRTR summary

Scientists may have solved the decades-old mystery of why the sun's outer atmosphere is hundreds of times hotter than its surface. Using the world's largest ground-based solar telescope, researchers finally detected elusive magnetic waves called Alfvén waves in the sun's corona, which appear to carry enough energy to account for at least half the heating required.

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