Foi confirmado sinal de vida no planeta K2-18b?

K2-18b, planeta a 124 anos-luz, voltou a ser observado por uma equipe da Nasa.

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Um estudo anterior apontava sinais de vida com base em um gás chamado DMS.

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A nova análise não confirma a presença do DMS na atmosfera do planeta.

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Mesmo que exista DMS, ele pode ter origem química e não biológica.

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A boa notícia é que o planeta tem água e talvez até um oceano líquido.

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Metano e gás carbônico foram detectados, reforçando a composição rica.

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Apesar disso, o DMS não é considerado bioassinatura confiável em K2-18b.

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O planeta é promissor, mas ainda não há sinal claro de vida.

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