Searching for Earth’s twin
12 years, 2 months ago

Searching for Earth’s twin

The Hindu  

The recent announcement at the American Astronomical Society meeting in California dramatically increases the possibility of finding Earth-sized extra-solar planets, or exoplanets, and in particular, those that are in a habitable ‘Goldilocks’ zone — neither too close nor too far from a star, so liquid water might be present on the surface. One study looked at the number of habitable Earth-sized exoplanets orbiting the smaller and cooler M dwarf stars. By studying about 3,600 of the 5,000 M dwarf stars present in Kepler’s field of view, researchers calculated that each of these stars had an 87 per cent possibility of having Earth-sized exoplanets, and nearly six per cent of the M dwarfs studied could be in the habitable zone. Advanced and sophisticated methods have helped in not only discovering exoplanets orbiting sun-like stars and M dwarfs but also in studying their atmospheric composition, accurately calculating their size and mass, and also the temperature at different altitudes.

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