Thread: The Horsehead: with a problem
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  #5  
Old 10-10-2016, 10:40 AM
rally
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rally is offline 		 
Join Date: Sep 2007
Location: Australia
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Are you referring to the large purple expanse either side of the horse ?
Thats IC434 an emission nebula.

The purple colouration is the DSLR/Processing response to Hydrogen Alpha emissions
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