Blue Moon

"Once in a Blue Moon". This Full Moon rising beyond Salisbury Cathedral is known as a Blue Moon as that is the name for a second Full Moon in a calendar month, which doesn't happen that often. It is also referred to as a Super Moon because it coincides with the Moon being at perigee - the closest it comes to Earth in its elliptical orbit. At 8.20pm when I took this photograph the Moon was 357,201 km from Earth, just 20 km further than its closest approach. I was 6 km from the Cathedral. The sky looked cloudy when I set out and when I arrived at my shooting position. But the cloud on the horizon turned out to be thin. Sometimes you get lucky. Once in a Blue Moon.