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L’ensemble de la Voie lactée «contient au moins 300 million "potentially habitable exoplanets, montre une nouvelle analyse des données du vaisseau spatial Kepler de la NASA.

Il y a au moins 300 millions d’exoplanètes dans l’ensemble de la Voie lactée qui présentent des caractéristiques similaires à la Terre, affirment des chercheurs de la NASA dans un communiqué de même qu’une étude publiée dans le Astronomical Journal.

«Depuis que les astronomes ont confirmé la présence de planètes au-delà de notre système solaire, appelées exoplanètes, l’humanité voulait savoir combien pourraient abriter la vie. Now, nous sommes sur le point de trouver une réponse. […] Environ la moitié des étoiles de température similaire à notre Soleil pourraient avoir une planète rocheuse capable de supporter de l’eau liquide à sa surface. Notre galaxie contient au moins 300 millions de ces mondes potentiellement habitables», indique le communiqué de la NASA.

«Nous voulons être très prudents au cas où la nature aurait des surprises concernant l’habitabilité», a expliqué au New York Times l’un des auteurs, Ravi Kumar Kopparapu, researcher at Goddard Space Flight Center (GSFC), le principal centre de la NASA consacré à la recherche scientifique. So, «nous avons intentionnellement réduit les estimations.»

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Exoplanet, Milky Way, Superhabitable planet, NASA, Galaxy, Star, Earth

World news – FR – NASA: the Milky Way "contains at least 300 million "potentially habitable exoplanets

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