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Nebula
Definition
A cloud of interstellar gas and dust. Nebulae are sites of star formation (emission nebulae) or remnants of dead stars (planetary nebulae, supernova remnants). Hubble and Webb produce iconic images of them.
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A cloud of interstellar gas and dust. Nebulae are sites of star formation (emission nebulae) or remnants of dead stars (planetary nebulae, supernova remnants). Hubble and Webb produce iconic images of them.