A sun with a "no" sign.
<a href="https://en.wikipedia.org/wiki/User:Capellan" class="extiw" title="w:User:Capellan">w:User:Capellan</a>
<a href="//commons.wikimedia.org/wiki/File:No_sun_sign.png" title="File:No sun sign.png">File:No sun sign.png</a>