A sunspot

Sunspots are regions on the solar surface that appear dark because they are cooler than the surrounding photosphere, typically by about 1500 K (Sunspots)

 (photo done with a cellphone camera through Victor's telescope)

An image of the Sun

 

Thanks to Victor Davies, a member of the Amateur Astronomers Association of Princeton, this summer we had an opportunity to observe the Sun through a telescope (photos: above by Karen and below by Anthony)