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Gnargenox
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Planets with potentially breathable atmospheres

23 Jul 2017 01:54

Yes, I think I am getting way too excited about what I've found so far. I need to real it in a bit and double check all my numbers. As exciting as it is to find a planet I think would be safe, I'm sure I'd be the guy in the movie that dies first after stepping out of the hatch without a helmet on.

So far, nearly 100 planets have been submitted. Around half of those were totally un-breathable. More than a third where tolerable for up to only 1 hour. A few were unknown since not all gasses where shown, but they would have been in either of those categories.

Only three (3) planets show signs of being truly breathable for more than an hour. However, all of those show indications of having too rich of an Oxygen mix in their thinner atmospheres than we are used to. The inspired O2 is too high if over 50% to 60%.

In no particular order, take your pick, these planets will sustain you without protection, for a few days most likely. That is if the cold isn't too much for you to take. (Cool planets are survivable, Cold planets are simply too cold IMHO).

______________________________________                
RS 0-8-3894743-1646-33-8-7338743-802 3                
Cool Desert with Organic unicellular terrestrial life                
-70°C    .229atm    .335g        all tolerable limits
O2     86%    .197atm        high inspired rate
CO2    14%    .0321atm        adaptable
SO2    4.28ppm    9.81*10^-7atm    smell detectable
H2S    1.33ppm    3.05*10^-7atm    smell detectable
                
______________________________________                
RS 5278-14-8-14274230-682 4                
Cold Desert with Organic unicellular terrestrial life                
-110°C    .434atm    .93g        too cold to breathe
O2    88.9%    .386atm        high inspired rate & pressure
CO2    11%    .0479atm        dangerous
H2S    5.71ppm    2.48*10^-6atm    nausea
                
______________________________________                
RS 5281-63-5-29597-72 6.5                
Cold Desert Moon with Organic unicellular terrestrial life                
-103°C    .292atm    .648g        too cold to breathe
O2    77.1%    .225atm        high inspired rate
CO2    22.5%    .0658atm        just over an hour allowed
H2S    2.83ppm    8.26*10^-7atm    smell detectable
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Watsisname
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Planets with potentially breathable atmospheres

23 Jul 2017 02:21

It's good to be excited!  Remember, there was a time not all that long ago when nobody was certain if breathable atmospheres like these existed in Space Engine, or how difficult it would be to find them if they did. Nobody had ever found one before!  

This feels almost like a virtual equivalent to the early days of exoplanet hunting. :)
 
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Planets with potentially breathable atmospheres

24 Jul 2017 16:45

You're right, it IS still exciting every time I get close. Here's a planet on the edge, being breathable for up to an hour only, on account of the CO2. What is nice is, it is a COOL planet, and not a COLD planet, and still with SO2 having a -6 exponent. Here you could enjoy 30°C warmer temperatures year round, over the average Cold planet and not die from SO2 or H2S. Also the O2 is in range for both partial pressure (around 2000m elevation on Earth) and inspired rate of O2 (around 60% max). Another planet you don't want to venture too close to sea level on.
scr04717.jpg

BTW, when temps get over 130˚F (54˚C) it often leads to heatstroke. Humidity plays a large roll in how hot it feels too. For extreme cold temperatures, along with a high wind chill factor, hypothermia can quickly set in. A temperature of 0°F (-17.8°C) and a wind speed of 15 mph creates a wind chill temperature of -19°F (-28°C). Under these conditions frost bite can occur in just 30 minutes. Below -60°F (-51°C), according to the NWS, exposed skin can freeze in just 10 minutes. If you were swimming in cold water, around 40°F (4°C) you're expected to survive for only about an hour.

 ~ Some cold-related illnesses include: hypothermia, frostbite, trench foot (or “immersion foot”), chilblains, Raynaud’s phenomenon (when blood flow to your fingers, toes, ears, or nose is restricted or interrupted), & cold-induced hives.

 ~ When your body first drops below 98.6˚F (37˚C), you may experience shivering, an increased heart rate, a slight decrease in coordination, & an increased urge to urinate.

 ~ When your body temperature is between 91.4˚ and 85.2˚F (33˚ and 30˚C), you’ll decrease the amount of or stop shivering altogether, fall into a stupor, start feel drowsy, be unable to walk, experience quick alternations between rapid heart rate and breathing too slowly, & shallow breathing.

 ~ Between 85.2˚ and 71.6˚F (30˚C and 22˚C), you’ll experience minimal breathing rates, poor to no reflexes, inability to move or respond to stimuli, low blood pressure, & possibly go into a coma.

According to a 1958 NASA report (can't find link), people can live indefinitely in environments that range between roughly 40˚F and 95˚F (4˚C and 35˚C), if the latter temperature occurs at no more than 50 percent relative humidity. See info graphic on first page of this thread. For ranges Frostbite occur, see this Windchill Chart

The famous explorer Magellan remarked on how the natives of Tierra del Fuego walked around naked in a climate where it rarely got above 50°F (10°C) in the summer. There is also a "-100 Club" of people who have visited the South Pole and have run, naked, out of the building, to the pole marker and around it a few times, and back, all while the air temperature is less than -100°F (-70°C). In the Antarctic, temperatures regularly get to -60°C, and people can survive here indefinitely if they have very good technical clothing that keeps their core body temperature within the normal range of 36.5-38°C.
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Starlight Glimmer
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Planets with potentially breathable atmospheres

25 Jul 2017 15:15

I notice that all these habitable deserts look the same. Kinda strange. Nice find! 
 
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Planets with potentially breathable atmospheres

25 Jul 2017 15:36

Thank you my kind friend! Most definitely, plus they really are too cold too. I want to wiggle my toes in the sand on a breathable, temperate, tidally locked Terra, where the land meets the ocean in a endless beach around the edge of the "eyeball". HA!

Here's one similar to what I mean, you could probably survive naked for about 30 minutes before CO2 or SO2 poisoning.
scr04708.jpg
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Planets with potentially breathable atmospheres

25 Jul 2017 16:04

What sort of filters and breathing masks would be used to filter out SO2 and CO2? 
 
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Planets with potentially breathable atmospheres

25 Jul 2017 17:23

There are many types or levels of protection against gasses and particulates that are respiratory dangers to humans. You can choose from an Escape Hood, an Emergency Escape Breathing Device EEBD, a Chemical Cartridge/Gas Mask with Air-purifying Respirator, powered or non-powered & or a Self-Contained Breathing Apparatus (SCuBA) system.

Mask like firefighters wear (with canisters) can filter CO2. Since CO2 is abundant even on Earth, mask standards are supposedly identified by the percentage rather than ppm that they filter. (i.e. 1% of CO2 = 10,000ppmv concentration on Earth).

Different Saftey regulations and standards in the European Union
For example, type E is for protection against SO2

Example of a CO2 mask, approved to EN 136 Class 3, the highest standard for safety, that reduces CO2 to a "minimum".
I have no idea what "minimum" means. lol
 
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Planets with potentially breathable atmospheres

26 Jul 2017 00:34

From what I've seen, most breathable planets are either deserts or terras.

Just out of curiosity, what stars do you most commonly find breathable planets around?
 
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Planets with potentially breathable atmospheres

26 Jul 2017 00:56

Probably Sun like stars (G spectrum) as well as F.

That's for me though. However most breathable planet that I find have no life on it...
 
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Planets with potentially breathable atmospheres

26 Jul 2017 11:51

I'd love to see examples of what y'all have found. Usually what I run across are Cold Deserts around Red Dwarfs. I never specify type of Stars in my searches. I've lately been setting my search parameters for any type of Cool planet with an atmosphere from 0.3 to 1.5 and with any kind of life. Life might not be necessary, but it makes searching easier since the planet is highlighted in green. The reason I look for lower temperature planets is because the toxic gasses would condensate out of the air. At least that is what appears to happen with whatever algorithm SE uses. Also, I notice Oceanias have more O2 but have not found one that is breathable yet.
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Planets with potentially breathable atmospheres

26 Jul 2017 15:32

Starlight Glimmer wrote:
After a long....Long...LONG time searching with lots of frustration and tedious clicking I found 2. 2 which may or may not be habitable.

Heres the rest of the list for RS 7066-35-7-982909-1456 4
Image
2 planets I found.
Image
This one may have too much SO2
Image

the first one of the three doesn't look habitable 
 
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Starlight Glimmer
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Planets with potentially breathable atmospheres

26 Jul 2017 15:40

alfa015 wrote:
Starlight Glimmer wrote:
After a long....Long...LONG time searching with lots of frustration and tedious clicking I found 2. 2 which may or may not be habitable.

Heres the rest of the list for RS 7066-35-7-982909-1456 4
Image
2 planets I found.
Image
This one may have too much SO2
Image

the first one of the three doesn't look habitable 

I know, these are old finds. 
 
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Starlight Glimmer
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Planets with potentially breathable atmospheres

26 Jul 2017 17:39

I've found 2 planets here.

Why does an over abundance of O2 hurt you? Whys it an issue? 

Image
Image
On this one I notice some planets are burning a horrible death. Poor things. 
 
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Planets with potentially breathable atmospheres

26 Jul 2017 19:47

Starlight Glimmer wrote:
Source of the post Why does an over abundance of O2 hurt you? Whys it an issue? 

It's a classic example of having too much of a good thing.  The problem is that oxygen is an "oxidizer", meaning it has a tendency to react with other substances by stealing electrons from them.  For example when oxygen reacts with iron (slowly) to form rust, or with fuels (rapidly) in a fire.

In our bodies, oxygen produces free radicals, which can do cellular damage.  Our bodies have mechanisms which act to deal with that damage, but it can only handle so much.  Under high partial pressures of oxygen, the system can't keep up and we begin to suffer hyperoxia.

It can be amazing to see the effects of oxidation reactions in the extreme end of the scale.  Hydrogen peroxide is a strong oxidizer on its own, and when combined with sulfuric acid becomes an infamous substance known as "Piranha Solution", which very quickly destroys almost all organic compounds.

Check out what it does to paper:

 
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Planets with potentially breathable atmospheres

26 Jul 2017 21:20

Also, heyyyyyy, that last planet you posted (15325-2 8) is completely breathable. :)  The O2 level is like being at 5500m (18000ft), and everything else is low enough concentration to be safe.

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