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Old 29-01-2013, 11:39 PM   #85
lightgiver
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Join Date: Apr 2008
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Lightbulb Horsehead Nebula

The Horsehead Nebula (also known as Barnard 33 in emission nebula IC 434) is a dark nebula in the constellation Orion. The nebula is located just to the south of the star Alnitak, which is farthest east on Orion's Belt, and is part of the much larger Orion Molecular Cloud Complex. The nebula was first recorded in 1888 by Williamina Fleming on photographic plate B2312 taken at the Harvard College Observatory. The Horsehead Nebula is approximately 1500 light years from Earth. It is one of the most identifiable nebulae because of the shape of its swirling cloud of dark dust and gases, which is similar to that of a horse's head when viewed from Earth..
https://www.youtube.com/watch?v=NWNWaWUxS5g

The red or pinkish glow originates from hydrogen gas predominantly behind the nebula, ionized by the nearby bright star Sigma Orionis. The darkness of the Horsehead is caused mostly by thick dust, although the lower part of the Horsehead's neck casts a shadow to the left. Streams of gas leaving the nebula are funneled by a strong magnetic field. Bright spots in the Horsehead Nebula's base are young stars just in the process of forming...



The dark cloud of dust and gas is a region in the Orion Nebula where star formation is taking place right now..

https://www.youtube.com/watch?v=T03EBbesIuw
Quote:
The primary is a blue-white star, and its companion (165°, 2.3") is a dull red. Close by, just to the south, is the renowned Horsehead Nebula, a so-called dark nebula that is not visible in scopes but quite spectacular in long-exposure photographs...
http://www.skyfactory.org/orionbelt/orionbelt.htm
http://www.davidicke.com/forum/showp...08&postcount=9
http://www.davidicke.com/forum/showp...9&postcount=16
http://www.davidicke.com/forum/showp...4&postcount=38
http://www.davidicke.com/forum/showp...&postcount=368

Last edited by lightgiver; 29-01-2013 at 11:55 PM.
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