NGC 6888 Crescent Nebula

Magnitude 7.4 emission nebula located 5,000 light-years away in the constellation Cygnus. It was formed by the fast stellar wind from the star HD 192163 colliding with and energizing the slower moving wind ejected by the star when it became a red giant around 250,000 to 400,000 years ago.

#astrophotography #astronomy #space #unistellar #citizenscience #ngc6888 #nebula #cygnus #caldwell27