NGC 6888 - Crescent Nebula

NGC 6888 - Crescent Nebula - roughly 5000 light years away in Cygnus. A large Hydrogen alpha [Hα] emission region from a 400,000 year old super nova colliding with the dynamic forces from a nearby star. The crescent shape is formed by the hydrogen being ionized by the star's energy, hence the name.

Full frame [<] and cropped full resolution [>] frames.

AT66 (imaging) 19 x 180s  @ ISO 1600 - f/6
C8 @ f/6.3 (guiding)
CGEM
SSAG, PHD, CS4, DPP, Gimp 2.6, 6/7/2010, 02:31 - mb