Sun’s coldest region stores secret to heating million-degree corona, study finds

Nearly 5,000 kilometers above the sun’s surface lies a century-old question for solar physicists—how are temperatures in the star’s upper atmosphere (corona) hundreds of times hotter than temperatures at the sun’s visible surface? Read more at In this video: A video showing high-resolution observations of transverse motion in the sunspot. Video Credit: NJIT-BBSO, Yuan et al., Nature Astronomy, 2023 Subscribe: Join Science X channel to support our mission: Thank you for helping our YouTube channel reach new heights! Hitting subscribe aids us in our mission to bring you the latest and greatest research news in science, medicine and technology.