New research suggests that rocky exoplanets in the atmosphere, dominated by hydrogen and helium, can create habitats over billions of years.
Studies suggest that these planets can maintain moderate conditions and liquid water on their surface for long periods of time.
Hydrogen and helium were readily available in the planet-forming material around young stars, creating an atmosphere in which all planets are dominated by these two elements.
In our solar system, the rocky planets have lost this atmosphere and support heavier elements like oxygen and nitrogen on Earth.
However, the researchers suggest that large rocky exoplanets may have an atmosphere of hydrogen and helium at some distance from the stars.
Marit Mall Lowes and her colleagues at the University of Zurich in Switzerland have investigated the evolution of such planets.
They created a model of the length that a hydrogen- and helium-rich exoplanet can put liquid water on its surface.
Their discovery is that, depending on the mass of the planets and their distance from the stars, these planets maintain an average surface environment for 8 billion years if the atmosphere is thick enough and 100 to 1000 times thicker. . From the earth.
“This result suggests that we need to rethink the concept of planetary habitat and make the classical definition more complete,” the study author wrote in the journal Nature Astronomy.
Source: Metro
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