Bok
09-02-2017, 09:09 AM
On July 5, 2017, NASA’s Solar Dynamics Observatory watched an active region — an area of intense and complex magnetic fields — rotate into view on the Sun. This image shows a blended view of the sunspot in visible and extreme ultraviolet light, revealing bright coils arcing over the active region — particles spiraling along magnetic field lines.
More... (http://www.nasa.gov/image-feature/nasas-solar-dynamics-observatory-watches-a-sunspot)
More... (http://www.nasa.gov/image-feature/nasas-solar-dynamics-observatory-watches-a-sunspot)