Three Planets in Habitable Zone of Nearby Star -- Gliese 667c

sciencedaily.com

24 points·cryptoz··6 comments

Given that we here on Earth have pieces of Mars that arrived as meteors, and that there's even some speculation on transfer of biological material via those meteors, would all 3 "habitable" planets have life with the same "programming"? That is, would life on all 3 planets have the same extraterrestrial DNA-equivalent? Or would all 3 planets have 3 kinds of life, each kind of life having the DNA-equivalent from one of the planets?

We'll probably never know, but it seems like fun to speculate.

I guess it could be similar to islands on Earth. They can be based on basically the same "model" of life, but have thousands of years of evolutionary divergence.

These 3 planets, are pretty near of his star. Probability will have the same face looking at the star thanks to tidal lock. So should be Cat Eye planets, not ? Plus on of the planets looks that have a visible elliptical path, that must make a very strong seasons, not ?

Probability will have the same face looking at the star thanks to tidal lock.

I realize that the earth/luna system is tidal locked, so we always see the same face.

But why is this true of this system, but not the earth/sol system? Why would you expect tidal lock in the cases of these three planets with their sun?

> Why would you expect tidal lock in the cases of these three planets with their sun?

Mercury have a nearly tidal lock (A Mercury day takes two Mercury years!). This planets are more near to his star that Mercury, so the tidal forces are more stronger. Give time and these planets will be tidal locked to his star (and they had at least a billon years). The question is if They are now locked.

HN article that links to the original source, i.e. the eso.org website: https://news.ycombinator.com/item?id=5938824

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