TEXTO PARA AS QUESTÕES DE 56 A 58 As astronomers gaze into the depths of space, they do so with unease: They don't know precisely what the universe is made of. Surprisingly, no one knows the stars' exact chemical composition: how many carbon, nitrogen and oxyg…
Segundo o texto, conhecer a composição de elementos químicos que constituem as estrelas é fundamental, pois ela, entre outros aspectos,
Resolver questão