Como surgiu o Sistema Solar há 4,5 bilhões de anos?

Há cerca de 4,5 bilhões de anos, o Sistema Solar era apenas uma enorme nuvem de gás e poeira girando lentamente no espaço.

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A gravidade começou a reunir esse material, formando uma região central cada vez mais quente que daria origem ao Sol.

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Quando a temperatura atingiu níveis extremos, reações nucleares começaram e nasceu a estrela que ilumina nosso sistema.

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Em torno do Sol recém-formado, espalhava-se um enorme disco de gás e poeira que serviria de base para o surgimento dos planetas.

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Pequenos grãos de poeira passaram a se unir, formando corpos maiores que cresceram gradualmente ao longo de milhões de anos.

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Colisões violentas eram comuns. Muitos objetos foram destruídos, enquanto outros se fundiram para criar novos mundos.

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Júpiter e Saturno acumularam enormes quantidades de gás e se tornaram os maiores planetas do Sistema Solar.

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Pesquisas indicam que os gigantes podem ter migrado, alterando órbitas e influenciando a formação dos demais planetas.

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Nos setores internos do disco, materiais rochosos deram origem à Terra e aos outros planetas terrestres conhecidos.

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Durante sua juventude, a Terra sofreu grandes colisões. Uma delas pode ter contribuído para formar a Lua.

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Asteroides e cometas preservam pistas desse passado remoto e ajudam cientistas a reconstruir a história do sistema.

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Muito antes da estabilidade atual, existiu um ambiente turbulento que moldou os planetas e definiu nosso futuro.

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