Horshead Nebula

Photograph information

Lens Sigma 170-500 F 6.8

Film: Kodak CPY400

Exposure : 30min Manual guided 

Date : 7/25/98

Location : Greece Parnasos mount

Photograph Information:

The Horshead Nebula (barnard 33 , I434 ) is the dark globule near the center of this image shaped like a horshead gave the name to the nebula. It is part of a large, dark, molecular cloud which cover about the upper half of the image.  The darkness of the Horshead is caused mostly by thick dust which absorb the glow of ionized gas. The red color originates from hydrogen gas predominantly behind the nebula, ionized by the nearby bright star Sigma Orionids, the bright star in the upper middle of image. 

The brightest star in the middle left of image is  Alnitak Zeta Orionids (one of Orion's belt stars). On the left is the bright  emission nebula NGC 2024 also named  "Flame Nebula" it is a relatively bright and is divided by a lane of dark nebulosity which branches through it and some also call this the Christmas Tree Nebula. All these nebulae are part of the large Orion cloud which is centered at the Great Orion Nebula M42 and extends over several hundreds of light years .The faint light beams travels for  about 1,500 light years to strike the surface of the film so you don have to expect to see any sign of this amazing photographic object in small telescopes.

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