I'm not sure where this goes. As you might know, I am working on the T5 World Builder (link in my signature). I want to expand it to detail words using Grand Survey and Grand Census.
The particular issue is the composition of Exotic, Corrosive and Insidious atmospheres. Normally during gameplay I wouldn't worry about it - it's the effect of the atmosphere that's more important. But in detailing a world using computer software we have a chance to add a bit more colour. Note that gas mix is not the only reason an atmosphere can be rated A, B or C; temperature and pressure could be factors.
Grand Survey (following on from the original Atmospheres Special Supplement in JTAS) details the following active atmosphere components that give rise to atmospheres.
Chlorine - corrosive or insidious; in trace amounts it could be a tainted atmosphere.
Fluorine - corrosive at best;
Carbon Dioxide - a high-pressure runaway greenhouse atmosphere is what Venus has (it's > 90% CO2)
Sulfur compounds - could be a taint or pollutant, but if there are significant amounts, atmosphere could be rated corrosive or insidious because of acid-vapour content.
Methane - exotic, large cold worlds.
Ammonia - Grand Survey reckons this would be a non-irritant (hence Exotic) but if you've every smelled ammonia or read warning labels, it sure sounds like a corrosive-at-best to me, depending on concentration in the atmosphere. If it even has just enough to exist in three states like water on Earth, don't expose your skin!
I need to avoid using the Mega Traveller WBH because as I understand it, it can't be covered by the standard legal notice Marc asks for. Which is a pity, it's a great product (although I've found substantial errors - completely ignore its temperature calculations).
What other gas mixes might be out there for rocky planets for atmosphere types A, B and C? Also interested in more gaseous taints or pollutants. I want to build them into tables for detail about each world.
I've had a go with Google but we just don't know enough about exoplanet atmospheres for it to be interesting. Venus, Mars (and that's a '1' in Traveller terms), Triton and Titan - that's all we really know about. We have glimpses of others (I've read the article on Wikipedia: https://en.wikipedia.org/wiki/Extraterrestrial_atmosphere)
The particular issue is the composition of Exotic, Corrosive and Insidious atmospheres. Normally during gameplay I wouldn't worry about it - it's the effect of the atmosphere that's more important. But in detailing a world using computer software we have a chance to add a bit more colour. Note that gas mix is not the only reason an atmosphere can be rated A, B or C; temperature and pressure could be factors.
Grand Survey (following on from the original Atmospheres Special Supplement in JTAS) details the following active atmosphere components that give rise to atmospheres.
Chlorine - corrosive or insidious; in trace amounts it could be a tainted atmosphere.
Fluorine - corrosive at best;
Carbon Dioxide - a high-pressure runaway greenhouse atmosphere is what Venus has (it's > 90% CO2)
Sulfur compounds - could be a taint or pollutant, but if there are significant amounts, atmosphere could be rated corrosive or insidious because of acid-vapour content.
Methane - exotic, large cold worlds.
Ammonia - Grand Survey reckons this would be a non-irritant (hence Exotic) but if you've every smelled ammonia or read warning labels, it sure sounds like a corrosive-at-best to me, depending on concentration in the atmosphere. If it even has just enough to exist in three states like water on Earth, don't expose your skin!
I need to avoid using the Mega Traveller WBH because as I understand it, it can't be covered by the standard legal notice Marc asks for. Which is a pity, it's a great product (although I've found substantial errors - completely ignore its temperature calculations).
What other gas mixes might be out there for rocky planets for atmosphere types A, B and C? Also interested in more gaseous taints or pollutants. I want to build them into tables for detail about each world.
I've had a go with Google but we just don't know enough about exoplanet atmospheres for it to be interesting. Venus, Mars (and that's a '1' in Traveller terms), Triton and Titan - that's all we really know about. We have glimpses of others (I've read the article on Wikipedia: https://en.wikipedia.org/wiki/Extraterrestrial_atmosphere)