Best of AOP - Diffuse Nebulae

Horsehead Nebula: Barnard 33

Chess, anyone?

This is the most famous example of a dark nebula, that is, an opaque cloud of dust that obscures a bright nebula behind it. The Horsehead is about a lightyear across, and about 1200 lightyears away. It is backlit by IC 434, a red cloud of energized hydrogen which is illuminated by Alnitak (Zeta Orionis), one of the belt stars of Orion the Hunter.

Check out the recent APOD image of the Horsehead Nebula from late 2013.

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Last Updated: 26-Jun-2014

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About This Image

Click on image for larger version.

Equipment

20in RC Optical Systems telescope Operating at f/8.1

Paramount ME Robotic Telescope Mount

SBIG STL-6303E CCD camera with color filter wheel

LRGB color production was used to create this image.

Digital Development (DDP) via CCDStack was also used in order to display the very dim and very bright details of

the image simultaneously.

Luminance = 15 minutes binned 2x2

Red = 15 minutes binned 2x2

Green = 15 minutes binned 2x2

Blue = 15 minutes binned 2x2

Minimum credit line: Blythe Guvenen/NOAO/AURA/NSF