The image above this text portrays an artist's imagination of an alien world with icy geysers. That world could be like the Triton moon of Neptune. And there is the strange planet in the sky of this world that can be somewhere.
In this text, the focus is on the search for non-intelligent alien species. Those species can be like mushrooms or bacteria. And maybe those lifeforms are opening the window to the question of what kind of planet can host intelligent lifeforms. If some old planets are hosting only primitive organisms, maybe those planets can tell why nature started to favor intelligence in the case of our species. Why there is no other intelligent species than humans on Earth?
Gliese 436 b is the planet covered by burning ice. The surface temperature of that planet is 431 Celsius. But strong gravitation denies the ice melting. That thing causes re-estimation for the term habitable zone.
There must be liquid water on the planet. Well, liquid water is important for life forms. Put planet name Gliese 436 b brings new focus to that problem. The heavy gravitation pulls water to ice on this burning hot planet. And the same way there could be water worlds where the gravitation or air pressure denies water from boiling.
So if we are thinking about the conditions of the forming lifeforms we should rather thinking the temperature on that planet than liquid water. The temperature on the planet can be so high. That amino acids cannot form. And if gravitation or pressure is high enough. That thing means that the planet can be burning inferno. But there is still liquid water.
The extraterrestrial lifeforms are hiding. We know that they should exist. But the question is where those lifeforms are hiding because we cannot see them. The JWST telescope offers a new possibility to observe exoplanets. That telescope sees many things.
But the extraterrestrial lifeforms are hard to detect. And the reason for that is we don't know what kind of lifeforms we should look for. If those exoplanets are far away. And even if some of those distant planets are covered by a dark forest. That will not mean that we could see that lifeform. Those lifeforms may look like our trees, but they will not release oxygen into the atmosphere. So in that case there would not be free oxygen in that planet's atmosphere.
Things like water worlds are not more promising. There is a possibility that the temperature on those planets is extremely high. And if the gas pressure is very high. That means the ocean cannot boil even if the temperature on those planets is very high.
In the atmosphere of one exoplanet is seen carbon monoxide. But that exoplanet is too hot to maintain lifeforms. If we are looking at the non-intelligent alien lifeforms we face one thing. The method that is used is to search for metabolites. But things like carbon monoxide can form otherwise than from burning forests.
That gas can form when the carbon impacts free oxygen in the planet's atmosphere. That oxygen can come from the molecular nebula. And when that oxygen impacts an atmosphere where are lots of carbon. That can cause the formation of carbon monoxide.
But at each time. When astronomers get new instruments they are closer to finding alien lifeforms. The problematic thing is that the non-intelligent alien lifeforms are hard to detect.
https://exoplanets.nasa.gov/search-for-life/habitable-zone/
https://futurism.com/the-strangest-exoplanet-ever
https://futurism.com/scientist-brink-alien-life
https://www.wonderslist.com/10-strange-and-mysterious-planets/
Image: https://futurism.com/scientist-brink-alien-life
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