[Sticky] Proxima B Discovery | Is it possible that there is life?  

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With the recent discovery of a planet orbiting our nearest neighboring star do you think it's possible that it harbors life? We know that it is very likely to be rocky, which is a great start. And it appears to be orbiting its host star in the habitable zone! 

My video on this topic

We need to analyse its atmosphere before we get too excited though, as this can make or break its ability to house life as we know it!

What do you guys think!?

PlanckTime - Amin

 
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Hmm... on the one hand, yay for habitable zone, but i am quite swayed by the argument that red dwarfs are not as hospitable as they appear. They iften have violent solar activity, so any such life would suffer a greater number of global extinctions due to that. And the habitable zone puts them too close. Would such a planet be locked in such a way that the same side would face the sun? With a thick atmosphere or large ocean this wouldnt be too bad, but if not, it would cause massive winds, and one side would bake while the other froze.

 

Having said that, there is potential evidence for life in very extreme conditions, such as before the late heavy bombardment 4.1 billion years ago on earth. So i guess there is no reason for microbial life to exist. But anything complex? Id say probably not. 

 

If some complex ecosystem did exist, it would be very interesting. The perpetual sunset would make a ring of high biodiversity, where the climate was very tolerable, and on either side greater extremes in temperature. Perpetual ice age winter on one side, and perpetual hot desert conditions on the other side.

"Either this wallpaper goes, or I go"- Oscar Wilde's last words

 
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Personally I agree with your arguments about red dwarfs. As the star has a much lower output than our star the habitable zone is way closer to the star. This leads to more exposure to solar activity such as flares. This would be perilous to any organism, unless there is some sort of super effective or super thick atmosphere on proxima B.

As for complex life, it's very unlikely, I mean we can hardly do any meaningful statistics with huge sample size of 1 (just earth having any life). 

I hope starshot gets funded so we can have a closer look in the near-ish future

PlanckTime - Amin

 
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https://youtu.be/KRGca_Ya6OM

 

Think this video ought to be relevant. At least in talking about alien life with a sample size of one (until we find some weird worm things in Europa and Io ofc 😛 )

"Either this wallpaper goes, or I go"- Oscar Wilde's last words

 
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Yeah thanks Saeed!!

PlanckTime - Amin

 
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