Existência de gás em Vênus pode indicar vida extraterrestre microbiana
Muito se discute sobre a existência ou não de vida fora da Terra. Mas parece que essa notícia que tanto enche o nosso imaginário nos filmes que ficção científica pode ganhar um novo capítulo na vida real.
Foi descoberto por um grupo internacional de cientistas a existência do gás fosfina na atmosfera do planeta Vênus. Existente também na Terra, o gás fosfina pode significar a existência de vida microbiana no planeta.
Um artigo foi publicado na revista Científica “Nature”. No contexto dos cientistas, como a fosfina existente na atmosfera terrestre é produzida por micróbios anaeróbios (que não precisam de oxigênio) ou pela atividade industrial, em Vênus, ele pode ter origem em processos fotoquímicos ou geoquímicos desconhecidos. Os cientistas não conseguiram identificar a fonte.
De acordo com a professora da Universidade de Cardiff, no Reino Unido e também líder do estudo, Jena Greaves, “isso pode apontar para a presença de vida nas nuvens do planeta”.
Segundo o artigo, apesar das suspeitas da professora Greaves, a descoberta do gás na atmosfera de Vênus é surpreendente porque as condições na superfície do planeta são hostis à vida e a composição das suas nuvens, local onde foi identificada a fosfina, é altamente ácida. “Em tais condições, a fosfina seria destruída muito rapidamente”, diz o texto.
Os cientistas, porém, afirmam que ainda são necessárias outras observações de Vênus e demais estudos para explorar a origem da fosfina na atmosfera do planeta.
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