2 didactic hours


Age of the Universe

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Discover your light

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Modelo Geocêntrico_deferentes e epiciclos

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O movimento diurno aparente do Sol

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Eclipse da lua

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Lei de Stefan-Boltzmann & Deslocamento de Wien

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Stars

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Why is it hotter in summer and colder in winter?

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The Sun also has spots!

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S/n remnants expansion

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