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An Earth-sized planet in the habitable zone of a cool star.
Science ; 344(6181): 277-80, 2014 Apr 18.
Article em En | MEDLINE | ID: mdl-24744370
The quest for Earth-like planets is a major focus of current exoplanet research. Although planets that are Earth-sized and smaller have been detected, these planets reside in orbits that are too close to their host star to allow liquid water on their surfaces. We present the detection of Kepler-186f, a 1.11 ± 0.14 Earth-radius planet that is the outermost of five planets, all roughly Earth-sized, that transit a 0.47 ± 0.05 solar-radius star. The intensity and spectrum of the star's radiation place Kepler-186f in the stellar habitable zone, implying that if Kepler-186f has an Earth-like atmosphere and water at its surface, then some of this water is likely to be in liquid form.
Assuntos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Planetas / Astros Celestes Idioma: En Revista: Science Ano de publicação: 2014 Tipo de documento: Article País de afiliação: Estados Unidos País de publicação: Estados Unidos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Planetas / Astros Celestes Idioma: En Revista: Science Ano de publicação: 2014 Tipo de documento: Article País de afiliação: Estados Unidos País de publicação: Estados Unidos