A drawing of a <a href="https://en.wikipedia.org/wiki/sunspot" class="extiw" title="en:sunspot">sunspot</a> in the Chronicle of <a href="https://en.wikipedia.org/wiki/John_of_Worcester" class="extiw" title="en:John of Worcester">John of Worcester</a>.
Original work by <a href="https://en.wikipedia.org/wiki/John_of_Worcester" class="extiw" title="en:John of Worcester">John of Worcester</a>.
<a rel="nofollow" class="external autonumber" href="http://sunearthday.nasa.gov/2006/multimedia/gal_014.php">[1]</a>