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The Cave Nebula (Sh2-155)

The Cave Nebula (Sh2-155) is a faint but large region of double ionized hidrogen, surrounded by dust, that lies in the constellation Cepheus. The area is rich in detail and very colourful, due to the red emission from ionized hidrogen and the blue of reflection nebulae. The area is populated by many dark nebulae, some very prominent and detailed. One of these is the central "cave-like" structure.

The full-resolution version of this image is about 41 Megapixels and has a resolution of about 1 arc-second per pixel. The area of sky shown here is about 1,7 x 1,8 (for comparison, the full-Moon disc has an average diameter of about 0,5). The color composite has been completed on May 20, 2006.
The full-resolution image
can generally be obtained. Typical applications are reproduction in books, magazines and periodicals, use for public exhibitions in planetariums, museums, talks, etc. If interested, please read my policy or e-mail me with your request.

Copyright: Davide De Martin.

This color composite image is based on data coming from several photographic plates taken between 1989 and 1991 through the Palomar Observatory's 48-inch (1,2-meter) Samuel Oschin Telescope as a part of the second National Geographic Palomar Observatory Sky Survey (POSS II). The photographs were recorded on two type of glass photographic plates - one sensitive to red light and the other to blue - that later were digitized.
Caltech, Palomar Observatory, Digitized Sky Survey.

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All images presented in this website are copyrighted Davide De Martin (2005-2014) otherwise noted. Reproduction or distribution of these images is not permitted without written consent. See also my policy of the use of images for further details or email me. Comments are welcome.
The astronomical images presented in this site were created with the help of the ESA/ESO/NASA FITS Liberator.