Planet with red sky can be inhabitable

One of the planets that 581d around turns of the Gliese star-dwarfed could be inhabitable, with propitious climate for the water existence in liquid state and life, as a study that one has equipped of climatologistas it finishes to publish. The Gliese 581d, third planet that gravitates around of the dwarfed-red, could be in a colored penumbra, with a dense atmosphere and a thick misty layer.

Discovered the 500 astronomers want to determine if some of exoplanetas are apt to shelter the life. Seven times more massive than the Land and pparently rocky, the Gliese 581d “could be the first discovered potentially inhabitable planet” until today, announced this monday the French National Center of Pesquisas Científicas (CNRS) in an official notice.

Detected in 2007 the 20 year-light (1 year-light = 9,5 trillions of km) of the Solar System, the Gliese 581d was considered in the cold occasion excessively to be inhabitable, that is, with compatible temperatures with the water presence in liquid state in its surface.

This exoplaneta, that it gravitates around of a little hot star, a dwarfed-red, receives three times little energy in comparison with that the Land receives from the Sun. Also it is possible that it always has the same face directed toward its star, while to another one remains in perpetual blackout.

Although the disadvantages, the Gliese 581d could benefit of a effect greenhouse, that it of the one hot climate “the point to allow the formation of oceans, clouds and rain”, as a modelização that illustrates “the great variety of possible climates for the planets of the galaxy”, added the CNRS.

In this simulation, the team of Robin Wordworth and François Forget, of the Laboratory of Meteorologia Dinâmica (LMD) of the Institute Pierre Simon Laplace of Paris, if inhaled in the used models for the study of the terrestrial climate, extending the gamma of possible conditions.

If it will have a dense atmosphere in carbon dioxide (CO2), what it is considered very probable by the scientists, exoplaneta can prevent the condensation of its atmosphere in the nocturnal face and also to have a hot climate.

After a called phenomenon “diffusion Rayleigh”, that of a blue tonality to our sky, the terrestrial atmosphere reflects for the space an important fraction of blue brilliance, limiting the heating of our planet. A effect that is little sensible with the red, according to scientists, whose works had been published in the scientific magazine The Astrophysical Journal Letters.