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Watch Known Universe online: Episode 3 Most Powerful Stars

The twinkling dots of light in the night sky are really among the most violent spots in space. National Geographic examines these fiery galactic furnaces to learn their secrets. Explore how a star becomes even more powerful in its violent supernova death. Delve into how these powerful stars affect the planets around them, from the utter devastation of their enormous amounts of energy, to the possibility of creating the ideal environment for life.

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