Hot Crescent Rolls… A Bubble?

The Crescent Nebula, also known as NGC 6888, is a very well renown and most intriguing object located in the constellation Cygnus in the northern hemisphere. At an apparent size of about 18 by 13 arc-minutes it is a very pale nebula. Even in a moderate amateur telescope you can't quite see this one unless you have absolute dark skies (or narrow band filters) and a decent "light bucket". So how do we get a chance to study it? Photographically, of course… (...)