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Describe the cycle of life and death we observe in the spiral arms.

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12 years ago

Describe the cycle of life and death we observe in the spiral arms.

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sarah!

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12 years ago

As the spiral-density wave moves through the gas and dust clouds, it prompts the rapid formation of the massive blue stars we find in the associations, born from hot, pink emission nebulae. But these massive stars evolve very quickly, blowing up as supernovae when hardly out of the nursery; their supernova shock waves reshock the medium, leading to formation of many more less massive Population I stars like our own Sun farther behind the density wave.

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