Spectacular views of Space

Witch Head Nebula: As the name implies, this reflection nebula associated with the star Rigel looks suspiciously like a fairytale crone. Formally known as IC 2118 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. [Photo: NASA]

The Horsehead Nebula, embedded in the vast and complex Orion Nebula, is seen in this representative-color image from the Canada-France-Hawaii Telescope in Hawaii. The dark molecular cloud, roughly 1,500 light years distant, is visible only because its obscuring dust is silhouetted against another, brighter nebula. The prominent horse head portion of the nebula is really just part of a larger cloud of dust which can be seen extending toward the bottom of the picture. [Photo: NASA]