A planet has just been confirmed as a place as promising for the origin of life as early Earth, if not more promising..
A study has just been published above Scientific letters from the Earth and planets First creation of a model evolution of the Martian atmospherelinking high temperatures during Mars’ “infant” warm phase to the creation of its oceans and primordial atmosphere.
Mars is inside Goldilocks Living Zone of the solar system, but it has long been known that it is too cold and arid for life. Some indirect evidence shows that in the past this planet may not have been like this, but the process of planetary evolution – which is full of luck – has worn it out.
The habitable Mars of the past
Mars was habitable in the past, perhaps even more so than Earth, according to researchers at the SETI Institute – (Graphical image from real data from Curiosity/NASA)
In the new model, created by the SETI Institute (Search for Extraterrestrial Intelligence Institute, funded primarily by NASA), the time it took for Mars to create its initial environment was recreated through data collected by NASA’s Curiosity rover , which still explores the red planet, as well as Martian meteorites that fell on Earth.
Therefore, Mars’ primordial atmosphere must have been about 1,000 times denser than it is todayincluded mainly molecular hydrogen (H2) in the upper layers of the atmosphere and abundant water vapor in the lower layers.
“This discovery is important because H2 is a powerful greenhouse gas. A dense H2 atmosphere would create a strong greenhouse effect that would allow warm or warm oceans to stabilize on the surface of Mars for millions of years.” , until the H2 is gradually lost. space” – wrote the authors in the publication.
This was determined by analyzing the ratio of hydrogen isotopes in Martian meteorites as well as in 3 billion-year-old clay samples collected by Curiosity.
Which just turned out to be the perfect puzzle piece for the scenario of an early red planet with large oceans, warm enough for life to arise thanks to the protection of “armor” H2.
“This is the first model to naturally reproduce these data, giving us confidence that the atmospheric evolution scenario we have described corresponds to primordial events on Mars.” – Daily SciTech cited researcher Kaveh Pahlevan of the SETI Institute.
Unfortunately, H2 is easily lost to space, so after billions of years this layer gradually thins, leading to a loss of water vapor, making the planet a planet “Dead Desert”, cold. However, it is clear that this planet was born to live.
Evaluating the model results as well as the conditions conducive to other forms of life on this planet, the SETI Institute authors concluded: “Early Mars was a hot version of Titan (Saturn’s moon) and constitutes a site at least as promising for the origin of life as early Earth, if not more promising. ».
Article source: NLD
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Recently, a planet was identified as a place as promising for the origin of life as early Earth, if not more promising. Research…