"Resolution" is used very loosely here. They are very big images of the full Sun (in terms of the number of pixels), but there are also various telescopes that

"Resolution" is used very loosely here. They are very big images of the full Sun (in terms of the number of pixels), but there are also various telescopes that "zoom in" much more on a small part of the Sun, resulting in images with much higher details than the ones from this article.