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Why are there so much carbon dioxide on life planets? - Space Engine

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Jackdaw
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Why are there so much carbon dioxide on life planets?

01 Aug 2017 20:47

Almost all the terras and oceanias with organic (even multicellular) life on them have carbon dioxide as the main component in their atmospheres. Why? That does not make sense. On Earth, plants consume carbon dioxide through photosynthesis, but on those exoplanets (even some planets that are mostly green on their lands), it seems that process doesn't work at all. To be honest, I never seen any life-supporting planet with CO less than 50% in their atmospheres in SpaceEngine before. 
Why?
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"...perch`e i nostri discorsi hanno a essere sopra un mondo sensibile, e non sopra un mondo di carta."

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Andromeda
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Why are there so much carbon dioxide on life planets?

02 Aug 2017 02:12

Actually, that's what Earth's atmosphere looked like billions of years ago. It would be nice to have some atmospheres with almost no CO2, but I guess the fact that it happened on Earth was unlikely.
https://en.wikipedia.org/wiki/Great_Oxygenation_Event
 
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Jackdaw
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Why are there so much carbon dioxide on life planets?

02 Aug 2017 03:59

"...perch`e i nostri discorsi hanno a essere sopra un mondo sensibile, e non sopra un mondo di carta."

CPU: Intel Core i7 5700HQ GPU: NVidia GeForce GTX 970M RAM: 16 GBs
 
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Starlight Glimmer
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Why are there so much carbon dioxide on life planets?

02 Aug 2017 07:59

This is because of the way the algorithm that generates the atmospheres is. Atmospheres in space engine are still a new thing and I won't be surprised if it is changed in the future. But youve also gotta keep in mind that these are alien worlds, to them Earth's atmosphere would be poisonous, not every planet with life out there will be like earth. 
 
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styrax
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Why are there so much carbon dioxide on life planets?

06 Aug 2017 13:47

The life can also rely on chemosynthesis.
 
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Mr. Missed Her
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Why are there so much carbon dioxide on life planets?

24 Sep 2017 11:51

Maybe there's forms of photosynthesis that are anaerobic, meaning that they don't produce oxygen in this case. There's probably plenty of other reactions that can pull energy from light other than the oxygen-releasing ones we're used to.
Space is very spacious.

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