60 milliards de planètes pourraient accueillir la vie uniquement dans notre galaxie ! Et on considère que l'univers comporte au moins 170 milliards de galaxies !

Michel Geiss said:

Interviews/Michel Geiss/

 5 July 2013 

Our galaxy could contain 60 BILLION alien planets capable of supporting life - double the number thought before

• Based on data from NASA's Kepler spacecraft, scientists had predicted there should be one Earth-size planet in the habitable zone of each red dwarf star
• But researchers at the University of Chicago have doubled that estimate after considering how cloud cover might help an alien planet support life
• Scientists found that if water was found on the surface of a planet it would result in clouds that could have a cooling effect no the planet
• Findings could prove a new way to confirm the presence of liquid water on the surface of alien planets

Scientists believe our galaxy could contain a staggering 60 billion planets that might be capable of supporting life.

Based on data from NASA's Kepler spacecraft, scientists had predicted there should be one Earth-size planet in the habitable zone of each red dwarf, the most common type of star.

But a group of researchers has now doubled that estimate after considering how cloud cover might help an alien planet support life.

Cloud cover is crucial for life, as clouds not only reflect sunlight to cool things off - they keep the planet warm enough to sustain life.

A planet with clouds and surface water orbits a red dwarf star in this artist's illustration of the Gliese 581 star system. New findings from the University of Chicago and Northwestern University show that planets orbiting red dwarf stars are more likely to be habitable than previously believed

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The spectacularly clear images of galaxies millions of light years from Earth captured thanks to lasers and mirrors

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