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A escuridão reina no espaço porque está no vácuo. No espaço não há partículas para realizar esse espalhamento. A luz viaja em linha reta. Esse é O PARADOXO DE OLBERS. A luz das estrelas mais distantes simplesmente ainda não chegou. O universo está se expandindo, o que deixa tudo mais distante. Se pudéssemos ver micro-ondas, o céu não seria escuro, mas brilhante e uniforme com o calor remanescente do Big Bang #ciencia #astronomia #sol #estrelas #universo
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A Via Láctea tem formato de galáxia espiral barrada, parecida com um grande disco achatado, com braços espirais que se estendem a partir do centro. Como a Terra está localizada dentro desse disco, não conseguimos vê-la de fora. Quando olhamos para o céu durante a noite, estamos observando ao longo do plano da galáxia, onde existe uma enorme concentração de estrelas, gás e poeira. A luz combinada de bilhões de estrelas muito distantes cria aquela aparência de faixa esbranquiçada que atravessa o c
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