What feature makes Dark Nebulae visually distinct from Emission or Reflection Nebulae?
Answer
They appear as silhouettes because they obscure light from objects behind them
Dark nebulae are cold, dense concentrations of gas and dust that are not energized; their dramatic appearance comes solely from their ability to block or obscure the light coming from background sources like star fields.
#Videos
Nebulae: Crash Course Astronomy #36 - YouTube
Related Questions
What is the Latin meaning of the word 'nebula'?What are the two most abundant elements that primarily compose the gaseous material within a nebula?How does the density of material within the densest parts of a nebula compare to the best vacuum achievable in human laboratories?What physical mechanism allows nebulae to function as 'stellar nurseries'?What causes Emission Nebulae to characteristically glow red or pink?Why do Reflection Nebulae often exhibit a blue hue?What feature makes Dark Nebulae visually distinct from Emission or Reflection Nebulae?What kind of stellar remnant forms a Planetary Nebula?What is the primary contribution of a Supernova Remnant to the interstellar medium?Where are nebulae generally concentrated within the structure of the Milky Way galaxy?