Final answer:
Nebulae are interstellar clouds of gas and dust that play a crucial role in star formation and cosmic evolution.
Explanation:
Nebula refers to a cloud of interstellar gas or dust that can glow with visible light or infrared, serving as the birthplace for new stars and solar systems. Examples like the Orion Nebula showcase the process of star formation within these vast cosmic clouds, while instances such as the Crab Nebula demonstrate remnants of massive star explosions. These phenomena provide valuable insights into the life cycles of stars and the dynamics of the universe.
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