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Evoluzione cosmica - stellare

. . . Contraendosi aumenta la temperatura e diminuisce la superficie emittente:varia la luminosit. Espandendosi diminuisce la temperatura e aumenta la superficie emittente:varia la luminosit. Luminosit in funzione di superficie emittente e temperatura : L = s T^4 * S = 4 pi*R^2 *s T^4. La lumi

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Evoluzione cosmica - stellare

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