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无烟无火做艾灸哈 7小时前 A supernova is a powerful and luminous stellar explosion. It is the largest explosion that takes place in space and is marked b优艾设计网_平面设计y a sudden brightening of a star. Supernovae are more energetic than novae. They are the source of the heaviest elements in the universe and play a significant role in enriching the interstellar medium with elements. Supernovae can briefly outshine entire galaxies and radiate more energy than our Sun will in its entire lifetime.
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