Perfectly round shape on the moon.

http://24.media.tumblr.com/tumblr_llbj9trfTx1qzt1kzo1_500.jpg

I just took this photo. Although the picture is pretty mundane, I observed something I have never seen before: The perfectly round circle on the bottom of the moon (bottom right hand corner).

At first I thought it was a crater, but it looks too perfect. What could it be?

What are the shiny dots all over the moon?