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Imperial Interstellar Scout Service Details of the worlds of the Imperium (and beyond).

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Old August 17th, 2006, 02:12 PM
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So Titan is very cold and probably has/had storms and perhaps methane rain with lakes of hydrocarbons at one time. What do we call this atmosphere? Exotic, corrosive? I think exotic right now.

http://seds.lpl.arizona.edu/nineplan...ets/titan.html
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Old August 17th, 2006, 02:14 PM
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Exotic IMTU.

What did Mr. Miller et al. rate it in Scouts?
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Old August 17th, 2006, 03:38 PM
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I don't know my as books only go up to #3.
Darn good question.
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Old August 17th, 2006, 03:43 PM
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I'm pretty sure Titan's atmosphere is A in Scouts, but I don't have my reprints handy at the moment - I can check it later today.
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Old August 17th, 2006, 04:12 PM
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It is indeed atmosphere A in Scouts.
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Old August 17th, 2006, 04:38 PM
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Quote:
Originally posted by Sigg Oddra:
It is indeed atmosphere A in Scouts.
And there you go - thanks, Sigg Oddra.

Now, a person knowledgeable in the planetary sciences might argue that this is a defect in the UWP atmosphere ratings: while the rules specify that an exotic atmosphere requires oxygen tanks, the conditions on Titan are such that only a vacc suit would provide adequate protection from the low pressure and deep cold of the satellite's surface.

To which I would reply, true enough as far as it goes, and this is where the referee's knowledge of the interaction of the planet's size, atmosphere, and position in the star system can be used to make a reasonable inference about the protection required for travellers venturing out on the surface of the planet. [img]smile.gif[/img]
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Old August 17th, 2006, 06:04 PM
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What low pressure? The surface pressure on Titan is higher than on Earth. What humans would need is protection from the cold and some oxygen to breathe.
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Old August 17th, 2006, 06:12 PM
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Well I never, thanks Tom [img]smile.gif[/img] , I didn't realise until you posted that (and a quick google) that Titan's atmospheric pressure is 1.5 times that of Earth.

http://www.esa.int/SPECIALS/Cassini-...F2HHZTD_0.html
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Old August 17th, 2006, 06:14 PM
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Ye gads, you're right - I know I read that someplace before, and totally spaced it (pun intended ) when I posted.

Thanks!
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Old August 18th, 2006, 11:50 AM
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Special Supplement 2, Exotic Atmospheres, mentions Titan in its description of 'exotic' atmospheres with methane components. However it also states that 'exotic' atmospheres have "fairly normal pressure and temperature ranges". It goes on to mention, in the section regarding 'corrosive' atmospheres, that temperature is the most important factor other than the mix of gases in determining corrosive effects. ie, requiring the use of a protective outfit.
Based on this description, Titan could be considered 'corrosive', unless you own a really thick overcoat!!
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