Across the upperleft, Orion's belt is clearly visible, and is also clearly visible to the unaided eye at night. To the left of Alnitak, the lower left belt star, is the FLame Nebula with bright emission clouds and dark dust lanes. Directly below Alnitak is the Horsehead Nebula, and the Orion Nebula (M42) is more to the right and clearly visible to the unaided eye. Rigel, the bightest star in the picture, illuminates the Witch Head Nebula as a blue reflection nebula. Barnard's Loop is the bright red circle that encompasses the whole image. This picture is truly amazing since it has so many different pieces of astronomy located in it. It's also pretty cool how you can clearly find Orion's Belt.
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