Are there some lifeforms on exoplanet K2-18b?


"Artist’s concept shows what exoplanet K2-18 b could look like based on science data. Credit: NASA, ESA, CSA, Joseph Olmsted (STScI), Nikku Madhusudhan (IoA)" (ScitechDaily, Did the Webb Telescope Find Alien Life on Exoplanet K2-18b? Here’s What We Know)


Exoplanet K2-18B is one of the so-called  Hycean worlds. The water-rich planet orbits a red dwarf K2-18 in the Leo constellation. The thing. What makes the K2-18b interesting is that the JWST telescope found methane and carbon dioxide in that exoplanet's atmosphere. Normally, those gases are connected with biological processes. The JWST telescope used its near-infrared spectrograph (NIRS), and Near-Infrared Imager and Slitless Spectrograph (NIRISS) systems for that finding. Methane and carbon dioxide do not necessarily mean life forms. 

But those gases are promising signs of primitive lifeforms that could be quite common on the water planets. Distance to the K2-18b is 124 light-years. And that makes it very hard to get resolution data. That can confirm the existence of those maybe amoeba algae-type lifeforms. The K2-18b is a locked planet, which means the other side of that planet always turns to its star. On those planets, there is a forever day. And on another side is forever night. 


"Artist rendering of the view on a Hycean world. Credit: Shang-Min Tsai/UCR" (ScitechDaily, Did the Webb Telescope Find Alien Life on Exoplanet K2-18b? Here’s What We Know)


If that kind of exoplanet is dry, the dayside is burning hot. But on water worlds, the water layer aligns with temperature. And it's possible. that there are some kind of, I hope, primitive lifeforms. Detecting primitive lifeforms is far harder, than detecting technically advanced civilizations. The only evidence of those lifeforms would be some carbon dioxide and methane emissions. 

The fact is this: the distance to the K2-18b is so long, that we cannot make any other decisions than there could be some lifeforms on that planet. But confirming that thing is impossible. That means we must wait a couple of hundred or thousand years before we can send a probe to that planet and get samples from its ocean to be sure about the existence of that suspected lifeform.

 So suspicions remain doubts until proven right or false. And in this case, the only way is to send a probe to the 124 light years from Earth. 



Red dwarf systems. And space flight hypothesis. 


But if there could be some kind of intelligent species on a planet that orbits red dwarfs, that hypothetical alien species could have far-advanced space technology systems than humans. Even if, that species' culture is the same age. The red dwarf planetary system's size is very small. 

And travel between planets is far easier than in our solar system. That means those hypothetical aliens would create spacecraft earlier than humans. The problem in our solar systems is that we have no targets for spaceflights. In red dwarf systems, those spacecraft can fly between planets more easily because the entire red dwarf planetary system fits in the distance of  Venus' trajectory. 


https://www.nasa.gov/universe/exoplanets/webb-discovers-methane-carbon-dioxide-in-atmosphere-of-k2-18-b/


https://scitechdaily.com/did-the-webb-telescope-find-alien-life-on-exoplanet-k2-18b-heres-what-we-know/


https://en.wikipedia.org/wiki/K2-18


https://en.wikipedia.org/wiki/K2-18b



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