60 The four types of nebulae

 

1. The birth place of stars, nebulae are clouds of gas and dust in space. more
3. The four types of nebulae are: emission, reflection, dark, and planetary. 
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5. Emission nebulae and reflection nebulae are bright nebulae. Emission nebulae are colorful and self-luminous. The Orion nebula, visible with the naked eye, is an example of an emission nebula. 
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7. Reflection nebulae are cool clouds of dust and gas. They are illuminated by the light from nearby stars rather than by their own energy.  more
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9. Notable Reflection Nebulae - paste 2 or 3
   • Pleiades Star Cluster.
   • Orion Nebula.
   • Witch Head Nebula.
   • Trifid Nebula. more
   • Iris Nebula.
   • Cave Nebula.
   • Flaming Star Nebula.
   • Ghost Nebula

   
   
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11. Dark nebulae, also known as absorption nebulae, are not illuminated and appear as holes in the sky. The Horsehead nebula in the constellation Orion is an example of a dark nebula. 
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13. Some of this text comes from here.

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