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On this page I collect my observations of the galactic nebula Caldwell 9 (Cave Nebula; Sh2-155) in the constellation Cepheus.
The galactic nebula Caldwell 9 (Cave Nebula) in the constellation Cepheus is a diffuse nebula within a larger nebula complex containing emission, reflection, and dark nebulosity.
Size: 50' x 30' (Wikipedia)
Distance: 2,400 light years (Wikipedia)
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The galactic nebula Caldwell 9 (Cave Nebula) in the constellation Cepheus (Image Courtesy of SkySafari Astronomy, www.simulationcurriculum.com)