Example of Clouds into two main types

Bright Nebulae (LBN) vs. Sunset Highlights
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• The Sunset Phenomenon (Bright)
  When the sun dips low, you see brilliant, glowing white, pink, or orange/golden edges on the rims of clouds – this is called a “silver lining“.
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• The Space Connection (Bright)
  This is exactly how a Lynds Bright Nebula works.
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  It does not create its own light. Instead, cosmic dust particles scatter and reflect the light coming from nearby hidden stars.
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• The Mechanism (Bright)
  Water droplets in the UK sky bounce sunlight toward your eyes, just as interstellar dust clouds scatter starlight across the galaxy.

Dark Nebulae (LDN) vs. Sunset Shadows
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• The Sunset Phenomenon (Dark)
  In the exact same sky, the thick cores of heavy rain clouds appear completely black, bruised, and silhouetted against the bright horizon.
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• The Space Connection (Dark)
  This is a direct analogue to a Lynds Dark Nebula (like the famous Horsehead Nebula).
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  These cosmic clouds are so incredibly dense with gas and dust that they block 100% of the starlight behind them.
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• The Mechanism (Dark)
  The dark patches in a UK sunset are not devoid of light; they are simply blocking the light from reaching you.
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  In space, dark nebulae hide thousands of background stars, appearing as empty “holes” in the night sky.