I saw this striking exhibit at Exeter Cathedral on the last day of my holiday. It's called the Museum of the Moon. The seven metre diameter model was made by artist Luke Jerram using detail from NASA high resolution images. 

The structure is very light and swings a little in response to the slightest of air currents in the Cathedral.

I took several photos including several 'full moon' types but in the end I preferred this partial view with the illuminated vault beyond.