Dr. Jeff Kretsch used the Coronado Solar Telescope at Turner Farm Observatory Park on September 14, 2022. To enhance the image and see solar prominences on the edge of the solar disc, the telescope uses a hydrogen-alpha filter, letting in only the light from hydrogen atoms on the sun. Hydrogen comprises the majority of the mass of the sun, but looking at the sun in only one frequency of light from the hydrogen atom shows detail not available in normal "white light" images.  NEVER LOOK DIRECTLY AT THE SUN unless you use a professional sun filter to block 99.999% of sunlight.