Kepler-22b: ¿un planeta con un inmenso océano de agua?
El primer día en la primera conferencia del observatorio espacial Kepler, a la que estoy asistiendo y que tiene lugar en NASA Ames, cerca de San Francisco, está siendo realmente interesante. Destacaría el resultado presentado por el investigador principal de la misión, Bill Borucki: el planeta Kepler-22b.

Destaca entro los más de 600 exoplanetas confirmados hasta el momento por su reducido radio (2.2 veces el de la Tierra), su periodo orbital (290 días, algo menos que un año terrestre), su estrella central (bastante parecida al Sol) y, sobre todo, por estar localizado a una distancia que hace que la temperatura superficial pudiera permitir la existencia de agua en estado líquido (ie, el planeta está en la denominada “zona de habitabilidad”). De hecho, los modelos indican que en realidad estaríamos ante un planeta con un núcleo rocoso, y con un inmenso océano de una gran profundidad, cientos o miles de kilométros (por comparación, el punto más profundo en un océano terrestre está a solo 11 kilómetros de la superficie), con una presión extraordinariamente alta. Este impresionante océano cubriría toda la superficie del planeta, que, por tanto, carecería de continentes. Cuando se tiene en cuenta la masa total del planeta, es probable incluso que la mayor parte del planeta sea eso: agua en estado líquido. Debido a que no se ha establecido todavía su masa, la composición del planeta, que de determina por métodos indirectos, no se conoce.

Entre otros descubrimientos, están los 48 candidatos tipo tierra (planetas rocosos) que también están localizados en la zona de habitabilidad. Pero su confirmación y caracterización requerirán bastante trabajo por parte de la comunidad científica.
Muy interesante noticia, muchas gracias.
Pero no entiendo una cosa. Si en el enlace de la NASA sobre Kepler22-b señalan que todavía no saben si su composición es rocosa, gaseosa o líquida, ¿no es un poco aventurado publicar que lo más probable es que este exoplaneta esté recubierto completamente por agua líquida, si la propia NASA no se atreve siquiera conjeturar sobre ello? Al menos no públicamente.
Un saludo, y ánimo con la web, que está muy bien.
Muio bom interessante
Muio bom interessante
tank you is post is post
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