Nick, hope you don't think I'm being too pedantic but you are a couple of stops off with your moon distance. The moon orbits earth at a distance of about 250,000 miles.
Anyone interested in getting into astronomy and/or astro photography may be interested in a new exhibition being held 17 - 18 May this year in Warwickshire. Wex Photographic in attendance as well.
Details at
http://www.international-astronomy-show.com
Pete.