This stunningly colorful picture is of two nebulae in the constellation Orion, which is one of the most recognizable in the winter sky.  The brightly glowing nebula to the right is the Orion nebulal, while the small-looking dark nebula in the bottom right is the horsehead nebula, named so because of its' resemblance to the head of a horse. This picture specifically attracted me because of both the beautiful colors and the immense sense of scale gained from it. The Horsehead nebula looks miniscule in comparison to the Orion nebula, while the Horsehead is in fact 13 lightyears across.