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Jimbo Jambo
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Planets with potentially breathable atmospheres

28 Feb 2022 18:43

Actually, my SO2 limit listed there is way too generous. Like, I probably dropped some zeroes somewhere. SO2 cannot be adapted to like CO2; it's like breathing acid. Chronic exposure to levels as low as 50 ppm seems to cause coughing and burning sensations in most people, and brief exposure to (unspecified) higher concentrations, even for just a few hours, can continue to cause life-threatening symptoms days later and respiratory complications that last for years.

5 ppm (0.000005 or 10[sup]-6[/sup] atm) is a more realistic upper limit for SO2, but even that might be pushing it. Most of this data comes from adults exposed for hours at a time, not infants and children breathing it from birth.

Speaking of SO2, have the devs ever addressed it? People here seem to agree that it's unrealistically common.
 
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PlutonianEmpire
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Re: Planets with potentially breathable atmospheres

01 May 2022 08:21

How livable is my custom planet?

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centri3
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Re: Planets with potentially breathable atmospheres

06 May 2022 10:00

i've neglected the forums a bit, so here's a breathable i found; unfortunately, it isn't very habitable...
as far as i know, this is the first 100% breathable atmosphere in 0.990 (low CO2, no SO2, little to no CO, above 0.15 atm partial pressure O2, etc...)

SpaceEngine 2022-05-06 09-55-53.jpg
 
centri3
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Re: Planets with potentially breathable atmospheres

06 May 2022 10:11

here's another breathable i found a couple weeks back. there's a bit too much CO2 for my liking, but i don't think i'll find anything better.

this is also pretty habitable, but there's still a few glaring flaws i want to fix in the future (aka i want to find a better planet)
SpaceEngine 2022-05-06 10-06-52.jpg
 
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Re: Planets with potentially breathable atmospheres

01 Jul 2022 05:20

Is the atmosphere of this planet breathable?
The Oxygen and H2O levels look too high but I'm not sure.
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Re: Planets with potentially breathable atmospheres

01 Jul 2022 05:44

Whoops nevermind, I totally misread the SO2 levels.
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Jimbo Jambo
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Re: Planets with potentially breathable atmospheres

01 Mar 2023 03:42

Some of the best planets I've found so far.

Image 1: SO2 is actually within safe levels, but the O2 is too high, of all things. Might be more livable at high altitudes.
Image 2: More breathable, but much drier.
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Chaprek
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Re: Planets with potentially breathable atmospheres

12 Jun 2023 10:05

 
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Xiphosura
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Re: Planets with potentially breathable atmospheres

30 Jul 2023 04:25

This one's real good, though the CO[sub]2[/sub] would leave one fairly puffed and quite fatigued. >80% O[sub]2[/sub] is probably counterbalanced by low overall pressure, if I remember the previous posts correctly. Not sure though, breathing is a complex beast but even pure oxygen is survivable at low temp for short periods of time. Despite breathable air becoming more common in 0.990, I haven't managed to find one that isn't lethal with SO[sub]2[/sub] yet. I will keep looking however. Gold standard would be permanently habitable, without even a strong stench of SO[sub]2[/sub]. Unaware of any found yet though I haven't checked every planet posted here.
 
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Xiphosura
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Re: Planets with potentially breathable atmospheres

30 Jul 2023 04:56

Just found this odd case, CO2 in the "puffed and fatigued" zone but the curious part is that there's no life here. I got no idea what put all that O2 in the air. Photodecomposition of H2O and loss of H perhaps? No idea if SE models that, I dunno how atmospheres are generated aside from the fact it's not a detailed simulation.
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Re: Planets with potentially breathable atmospheres

07 Aug 2023 09:33

Just found this odd case, CO2 in the "puffed and fatigued" zone but the curious part is that there's no life here. I got no idea what put all that O2 in the air. Photodecomposition of H2O and loss of H perhaps? No idea if SE models that, I dunno how atmospheres are generated aside from the fact it's not a detailed simulation.
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Those levels of CO2 are insane, compared to earth's
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Re: Planets with potentially breathable atmospheres

08 Aug 2023 08:26

i've neglected the forums a bit, so here's a breathable i found; unfortunately, it isn't very habitable...
as far as i know, this is the first 100% breathable atmosphere in 0.990 (low CO2, no SO2, little to no CO, above 0.15 atm partial pressure O2, etc...)


SpaceEngine 2022-05-06 09-55-53.jpg
I though it was water but then I've looked better... the seas are made of liquid nitrogen and oxygen!
Not for the people like me who feels cold when everyone is okay  :???:
But very nice catch!

Actually it's kind of weird that there's molecular oxygen in the atmosphere, since boiling point is -189°C.
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