A reflection nebula is a cloud of interstellar gas and dust that, as the name implies, reflects and scatters the light from nearby bright stars. The energy from these stars is not intense enough to ionize this gas so that it gives off its own light. This reflective dust often comprises copious amounts of carbon, iron, and nickel. 

The reflection and scattering of light tends to produce bright to deep blue colors, although a reflection nebula can also take on the dominant color produced by the energizing star or stars. Emission nebulas can also surround and infuse reflection nebulas, thus creating an amalgam of colors that may include various shades of pink and red.