In astronomy, reflection nebulae are clouds of dust which reflect light of a star or many stars. The light from the nearby star, or stars, is not hot enough to ionize the gas of the nebula to make an emission nebula, but is enough to make the dust visible because the light reflects off of the dust.
Reflection nebulae may also be the site of star formation.
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- James B. Kaler (1998). Kosmische Wolken. Materie-Kreisläufe in der Milchstraße. Spektrum Akademischer Verlag.