Reflection nebulae are clouds of dust and gas in space that do not emit their own light. Instead, they shine by reflecting the light from nearby stars. This light can create beautiful colors, often appearing blue due to the scattering of shorter wavelengths of light. These nebulae are typically found near young stars that are still forming. The dust particles in the nebula scatter the starlight, making the nebula visible. Reflection nebulae are important for studying the processes of star formation and the composition of interstellar matter.