NGC 7129 is a reflection nebula located 3,300 light years away in the constellation Cepheus. A young open cluster is responsible for illuminating the surrounding nebula.
A recent survey indicates the cluster contains more than 130 stars less than 1 million years old. NGC 7129 is located just half a degree from nearby cluster NGC 7142.(lower left)
The nebula is rosebud-shaped; the young stars have blown a large, oddly shaped bubble in the molecular cloud that once surrounded them at their birth.
The rosy pink color comes from glowing dust grains on the surface of the bubble being heated by the intense light from the young stars within.
The ultra-violet and visible light produced by the young stars is absorbed by the surrounding dust grains. They are heated by this process and release the energy at longer infrared wavelengths.
11/11/14 x 10 min each of RGB, 37 x 10min Luminance
Camera: Apogee U16M (16803) w Gen II Astrodon LRGB
Scope: 12.5" Planewave CDK
Mount: Paramount ME
Guiding SBIG ST402ME and Astrodon MMOAG
RGB and Luminance processing in PixInsight; Blend of Luminance w RGB and clean-up of column defect and save-for-web in PS CC