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Il y a 23 heures · Stars of lower masses have cooler cores and slower fusion rates, giving them smaller luminosities and longer lifetimes. Study with Quizlet and memorize flashcards containing terms like A star's luminosity is the A) apparent brightness of the star in our sky. B) surface temperature of the star. C) lifetime of the star.
Il y a 23 heures · Study with Quizlet and memorize flashcards containing terms like What percentage of the mass of the solar nebula consisted of elements other than hydrogen and helium? A) 0 percent B) 0.1 percent C) 2 percent D) 20 percent E) 80 percent, Where did the elements heavier than hydrogen and helium come from? A) They were produced in the Big Bang. B) They evolved from hydrogen and helium shortly ...
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