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If supermassive stars burn their fuel in millions of years, and solar-mass stars like our Sun last billions of years, then how long is the life of a red or brown dwarf star?

CHARLIE KNUDSEN, KINGSLAND, GEORGIA
In many ways, stars are similar to automobiles. Massive stars are the racecars of the stellar auto lot, guzzling their hydrogen fuel as they race through their few-million year lives that usually end in spectacular blowouts, otherwise known as supernovae.

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