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.

[{"selector":"#anim-454dc856-a76f-4799-b29c-ee2006b2be0f","keyframes":{"opacity":[0,1]},"delay":500,"duration":1200,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-8ba5f33e-70a2-448d-8dba-dcc07f55f282 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(66.30859365400296%, 0, 0)","translate3d(0%, 0, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}]

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

[{"selector":"#anim-3a770ccf-cc60-4fd3-9afb-338e753e5340","keyframes":{"opacity":[0,1]},"delay":500,"duration":1200,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-39dd1210-a604-4c11-9156-04e69b5f3238 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(-57.03472212617777%, 0, 0)","translate3d(0%, 0, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}]

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

[{"selector":"#anim-b49f8b4c-d6ea-40fc-b6a8-f2601bcadfbd","keyframes":{"opacity":[0,1]},"delay":500,"duration":1200,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-4583fa98-1588-4112-93e3-df0ad43fa468 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(49.63179964787039%, 0, 0)","translate3d(0%, 0, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}]

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

[{"selector":"#anim-e5e2c0c8-1be7-401c-bba2-332b45221f6f","keyframes":{"opacity":[0,1]},"delay":500,"duration":1200,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-0cfffb1c-3cb0-4323-bea2-7ef0f0e4c4db [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(-9.244791538670604%, 0, 0)","translate3d(0%, 0, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}]

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

[{"selector":"#anim-0b342b16-c20a-411a-9471-59eb5fdb0232","keyframes":{"opacity":[0,1]},"delay":500,"duration":1200,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-089a9980-5a8d-4042-b2f7-611aa3fcd388 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate(0%, 0%) scale(1.5)","translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}]

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

[{"selector":"#anim-21d9eff8-a845-43ee-b4da-026fd6a6a2b0","keyframes":{"opacity":[0,1]},"delay":500,"duration":1200,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-34e6d624-25c2-4341-a5be-8c84ea96ffd9 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate(0%, 0%) scale(1.5)","translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}]

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

[{"selector":"#anim-e6f7d25c-a868-4f3e-ae70-0db722757e86","keyframes":{"opacity":[0,1]},"delay":500,"duration":1200,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-fcfda135-2608-46fd-9f71-9faa03f3ab87 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(34.03906240314965%, 0, 0)","translate3d(0%, 0, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}]

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

[{"selector":"#anim-28653b1a-d7cb-44fc-901b-202cd7416896","keyframes":{"opacity":[0,1]},"delay":500,"duration":1200,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}]