Exoplanets may provide habitable conditions for billions of years, says study

Image Credit:metro

According to the findings, these planets are capable of retaining temperate weather and liquid water on their surface for extended periods of time.

All planets developed atmospheres that were dominated by the gases hydrogen and helium

 because these two elements were easily accessible in the planet-forming components around young stars.

Rocky planets in our solar system shed this atmosphere in favour of heavier substances like oxygen and nitrogen on Earth.

Large rocky exoplanets, on the other hand, may be able to keep their hydrogen and helium-dominated atmospheres if they are sufficiently far from their star.

Image Credit:science

The evolution of such planets was studied by Marit Mol Lous and colleagues at the University of Zurich in Switzerland.

They created a model to predict how long exoplanets rich in hydrogen and helium may support liquid water on their surfaces.

According to their research, these planets might maintain a temperate surface environment for as long as eight billion years

if the atmosphere is thick enough—between 100 and 1,000 times thicker than the Earth's. This depends on the mass of the planet and how far it is from its star.

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