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This seldom imaged composition
located centrally in Cygnus rides high in the fall skies this
time of year, and offers a good challenge to imagers of all focal
lengths. Discovered in 2007, the Soap Bubble nebula resembles
only one other object in the northern skies, the Bubble nebula
in Cygnus. They are both the same type of object, a blown bubble
in the insterstellar medium from the hot wind of a massive star.
To the upper right is
the Crescent Nebula NGC6888. This is another type of object,
consisting of a central super hot Wolf-Rayet type star surrounded
by a stellar wind blown nebulosity ejected by the star earlier
in its evolutionary phase.
There is also extensive
background hydrogen nebulosity in this region of the sky showing
up here by the general background glow and streamers of red wisps.
Two views are shown
below. The first is the conventional image and second with lablels.
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