IC5070

This is a false color composite image of the ionization front at the
edge of the Pelican Nebula (IC5070) in the constellation Cygnus. By
using narrow filters centered around the specific emission lines we
expect to see from different elements in different states, we can
determine exactly what physical process is responsible for the state
of the nebula. In this instance, red comes from the H-alpha line at
656nm and blue-green comes from the SII line at 672nm.

This image was obtained with the 2048x2048 pixel CCD (T2KA) at the 0.9
meter telescope of the Kitt Peak National Observatory near Tucson,
Arizona.

Minimum credit line: John Bally (U.Colorado), AURA/NOAO/NSF (for
details see Copyright Statement)