Cartão Witch Head Nebula IC 2118

Witch Head Nebula formally known as IC 2118 is in the constellation Orion. The Witch Head Nebula glows primarily by light reflected from the star. The color of this very blue nebula is caused not only by blue color of its star, but also because the dust grains reflect blue light more efficiently than red. A similar physical process causes Earth's daytime sky to appear blue.