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Characteristics of Habitable Planets

Wednesday, 29 June 2022 – 11:29 WIB

VIVA – A habitable world is considered to have the same characteristics as Earth. The key is in the water where it is essential for life to arise.

Scientists have determined one type planet exoplanets that may have habitable conditions for billions of years. The region had a better chance of cultivating life as we understand it today.

New research led by astronomer Marit Mol Lous of the University of Zurich in Switzerland concludes that a nice, thick atmosphere of hydrogen and helium can maintain temperatures and conditions suitable for life for a very long time.

“One of the reasons why water can be liquid on Earth is its atmosphere,” said theoretical astrophysicist Ravit Helled. Science AlertWednesday, June 29, 2022.

With a natural greenhouse effect, the planet retains the right amount of heat to create the right conditions for oceans, rivers and rain.

However, Earth’s atmosphere will not always look as it does now. Today most of the nitrogen followed by oxygen has only small amounts of hydrogen and helium.

When the new Earth formed, the planet had a primordial atmosphere consisting mostly of hydrogen and helium. But its primordial atmosphere was lost in its early phases, possibly due to several processes including irradiation from the very hot young Sun and meteorites.

Extrasolar larger than Earth, but smaller than Neptune may be able to maintain its primordial atmosphere longer than Earth.

“Such a massive primordial atmosphere can also cause a greenhouse effect. We therefore wanted to find out if this atmosphere could help create the necessary conditions for liquid water,” he said.

To carry out this investigation, the team modeled planet ekstrasurya with the core mass, atmospheric mass, and orbital distance from the parent star modeled by the team similar to the Sun.

The results show that exoplanets with thick primordial atmospheres were warm enough to sustain the existence of liquid water for up to 10 billion years.

To avoid stellar radiation that could strip the primordial atmosphere, the exoplanet would have to be quite far from the star, about twice the distance of Earth from the Sun.

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