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the Iris Nebula [View all]
known as NGC 7023 the nebula is blue becasue it'ss a reflection nebula. light from a star is being scattered by dust particle in teh same manner as scattering makes the sky blue. the wideer shot shows a lot of the dust besides the nebula
this is a total of 7 hours of exposure time (84 300 second exposures) from my backyard
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= new reply since forum marked as read