NGC 6888 -- The Crescent Nebula
         Click on image to enlarge
OGS 12.5" RC @ f/9
SBIG STL 11k
Astrodon Series I LRGB

(HaR)(HaR)GB

Ha = 30 min x 24, 1x1
R =   15 min x 10,  1x1
G =  15 min x 12,  1x1
B =  15 min x 12,  1x1

Processed with CCD
Inspector, CCDsoft,
Registar, Sigma
Combine, Neat Image,
and Adobe PS.
The Crescent Nebula is
a planetary nebula -- a
shell of glowing gas
ejected by a dying star.
See the
Ring Nebula  
for  comparison.  The
central star supplying
the energy to the
Crescent Nebula is
known as a
Wolf-Rayet
star. The Crescent is
located in the
constellation of Cygnus,
the swan, about 5000
lightyears away. This site
contains 2 other images
that show the Crescent in
wider views -- click
here
or
here.