NASAのインスタグラム(nasa) - 10月21日 02時44分

Great ball of fire! ☀️ The Sun's rotation brought a new active region into view, revealing the dynamic arches and twisting streams of its magnetic field on Oct. 10-11. New active regions are becoming more of a rare sight, as the Sun is currently approaching solar minimum—the point of the 11-year solar cycle when activity is most reduced. The video shows images taken in a wavelength of extreme ultraviolet light and covers 33 hours made from over 500 frames (i.e., one frame selected every 4 minutes). Viewed by our Solar Dynamics Observatory, we seek to learn more about our closest star that will help us understand where the Sun's energy comes from, how the inside of the Sun works, how energy is stored and released in the Sun's atmosphere and much more.
Credit: NASA/Solar Dynamics Observatory
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