Here’s another view of the Sun of 13th August. On it, you can spot several dark lines – filaments, which are large regions of very cool gas
usually above the chromosphere (second of the three main layers in the Sun’s atmosphere).
But if they appear on the “edge” of the Sun, they look like flames as they’re brighter than the dark outer space behind them. In that case we call them prominences and you can see many of them as well.
The third thing to notice are those bright spots called plages after the French word for “beach”.You can see the equipment (belonging to this astronomer) I took this image with over at Sci-Universe’s instagram account!