NEBULAE:BIRTHPLACE OF STARS

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Stars are born in an enormous cloud of interstellar dust and hydrogen gas called a nebula. Nebulae represent if the building blocks for stars, galaxies, and planets in the universe. Emission nebulae are hot, discrete clouds of primarily ionized hydrogen that glow with their own light. Reflec-tion nebulae emit a bluish glow by re-flecting the scattered light of nearby stars. Absorption nebulae, or dark nebulae, comprise dense clouds of gas and dust. They appear as silhouettes against the light f brighter objects. 
Nebulae form when stars die. When the end comes for our sun, for example, its outer layers will heat, swell, and eventually flow off. The hot, dead core will create a glowing nebula, which will in turn become a nursery for new stars. 


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