A Photo A Day - Day #156

This one time my friends and I had a ridiculously long argument over whether we were looking at the sun or the moon. It sounds weird but it was an overcast day and it really was hard to tell! Given, there may have been a few margaritas involved but still....the funniest part is to this day we still don't know what it was! Half of us swore it was the moon and the other half the sun.  This picture made me think of that...what do you think it is - moon or sun?