A cloud of interstellar gas and dust that absorbs most or all of the light from luminous objects like stars behind it, appearing as an irregular dark patch. Some absorption nebulae, such as the Coalsack, are visible to the naked eye. Also called Bok globule . Also called dark cloud . Also called dark nebula .
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absorption nebula. (n.d.). Retrieved November 09th, 2018, from https://www.yourdictionary.com/absorption-nebula
A mass of interstellar gas and dust that absorbs most or all of the light from the stars behind it. Absorption nebulae appear as irregular dark patches and collectively cover about two percent of the sky. Some absorption nebulae, especially the Coalsack near the constellations Centaurus and Southern Cross, are visible to the naked eye. Also called dark cloud