mars's atmosphere

[ckleve]

what if mars's atmosphere was identical to that of earth but was much more dense (62% of the total weight of the earth.) what do yall think it would be like and do you think it would be habitable?

 

[swansont]

How would it be more dense with weaker gravity?

[mathematic]

Venus is about the same size as earth.  Is it at all feasible to make it habitable?

[Moontanman]

16 minutes ago, swansont said:

How would it be more dense with weaker gravity?

Saturn's moon Titan has a denser atmosphere than the Earth and it's gravity is only tiny bit more than Luna... 

6 minutes ago, mathematic said:

Venus is about the same size as earth.  Is it at all feasible to make it habitable?

Venus is a special case, if you measure the incoming sunlight intensity it shouldn't really be much hotter than the Earth. But coincidentally at or near the altitude where Venus' deep atmosphere is about the same as Earth the temperature is also comfortable. We could colonise Venus with cities built around giant balloons.  The gas mixture we breath is lighter that the CO2 atmosphere of Venus so we could build lighter than "air" cities in the clouds. You could lower a turkey down to the hot depths and cook it, pull it back up and Free cooking of a turkey!  

Venus has been largely ignored by the colonise off earth crowd but it might be the easiest and ultimately best choice.  

42 minutes ago, ckleve said:

what if mars's atmosphere was identical to that of earth but was much more dense (62% of the total weight of the earth.) what do yall think it would be like and do you think it would be habitable?

 

 

Mars is cold, colder than Antarctica, the low gravity wouldn't allow Mars to hold on to gasses long term and the greenhouse gas levels to keep it warm would be a problem since CO2 would be the primary greenhouse gas we couldn't breath it even if it was warm, wet and full of oxygen... 

[Vmedvil]

15 minutes ago, Moontanman said:

Saturn's moon Titan has a denser atmosphere than the Earth and it's gravity is only tiny bit more than Luna... 

Venus is a special case, if you measure the incoming sunlight intensity it shouldn't really be much hotter than the Earth. But coincidentally at or near the altitude where Venus' deep atmosphere is about the same as Earth the temperature is also comfortable. We could colonise Venus with cities built around giant balloons.  The gas mixture we breath is lighter that the CO2 atmosphere of Venus so we could build lighter than "air" cities in the clouds. You could lower a turkey down to the hot depths and cook it, pull it back up and Free cooking of a turkey!  

Venus has been largely ignored by the colonise off earth crowd but it might be the easiest and ultimately best choice.  

 

Mars is cold, colder than Antarctica, the low gravity wouldn't allow Mars to hold on to gasses long term and the greenhouse gas levels to keep it warm would be a problem since CO2 would be the primary greenhouse gas we couldn't breath it even if it was warm, wet and full of oxygen... 

Ya, I don' think that Venus would be a good choice something to do with high concentrations of sulfuric acid in its atmosphere unless you like sulfuric acid rain, better build your house out of glass.

Venusian clouds are thick and are composed mainly (75-96%) of sulfuric acid droplets. These clouds obscure the surface of Venus from optical imaging, and reflect about 75% of the sunlight that falls on them.

With Mars it is not about gravity it is about a lack of magnetic field every-time the Solar winds of the sun happen it blows away mars's atmosphere because of not having one unlike the Earth which when that magnetic field failed mars starts to become less earth like it was once every much like earth most people think before this loss of atmosphere due to magnetic field failure. 

Earth during a solar wind.

 

Earth versus Mars magnetic field.

So, that is why Mars's Atomsphere is so thin now versus when it used to be earth-like millions and billions of years ago. 

Edited December 9, 2017 by Vmedvil

[swansont]

11 minutes ago, Moontanman said:

Saturn's moon Titan has a denser atmosphere than the Earth and it's gravity is only tiny bit more than Luna... 

Is its composition identical to earth's?

(also, Titan is a lot colder, as you note)

[Moontanman]

4 minutes ago, swansont said:

Is its composition identical to earth's?

(also, Titan is a lot colder)

Actually being primarily Nitrogen Titan's atmosphere is quite similar to Earth's but around 50% denser. Cold is indeed at least part of the reason Titan has a dense atmosphere. 

8 minutes ago, Vmedvil said:

Ya, I don' think that Venus would be a good choice something to do with high concentrations of sulfuric acid in its atmosphere unless you like sulfuric acid rain, better build your house out of glass.

Venusian clouds are thick and are composed mainly (75-96%) of sulfuric acid droplets. These clouds obscure the surface of Venus from optical imaging, and reflect about 75% of the sunlight that falls on them.

The altitude I am talking about is well above the sulfuric acid clouds. 

[Vmedvil]

3 minutes ago, Moontanman said:

Actually being primarily Nitrogen Titan's atmosphere is quite similar to Earth's but around 50% denser. Cold is indeed at least part of the reason Titan has a dense atmosphere. 

The altitude I am talking about is well above the sulfuric acid clouds. 

Oh, the cloud city like colony idea that was taken from Star Wars for Venus, maybe like that, but the surface is like hell.

Edited December 9, 2017 by Vmedvil

[Moontanman]

1 minute ago, Vmedvil said:

Oh, the cloud city like colony idea that was taken from Star Wars for Venus, maybe like that, but the surface is like hell.

 

[swansont]

5 minutes ago, Moontanman said:

Actually being primarily Nitrogen Titan's atmosphere is quite similar to Earth's but around 50% denser. Cold is indeed at least part of the reason Titan has a dense atmosphere. 

No oxygen to speak of. I imagine it would tend to liquify at night.

[Moontanman]

1 minute ago, swansont said:

No oxygen to speak of. I imagine it would tend to liquify at night.

It doesn't get cold enough on Titan to liquefy oxygen...

[Vmedvil]

53 minutes ago, swansont said:

No oxygen to speak of. I imagine it would tend to liquify at night.

Hey, don't disturb the natives on the moon Titan, there are Thiocyanide cell membranes forming for cells there for Methane life, Nitrogen Based in the pools of ethane and methane, go to Europa or something.

Titan cell membrane like Bubbles found

Carbon based cell membrane.

Let them form it will take a several billions years but when the sun starts to Red giant hopefully they will get out of this solar system.

Nanorobotics wiki

Edited December 9, 2017 by Vmedvil

[swansont]

16 minutes ago, Moontanman said:

It doesn't get cold enough on Titan to liquefy oxygen...

There are regions that get below 90K

https://www.nasa.gov/image-feature/jpl/pia20020/titan-temperature-lag-maps-animation

[Moontanman]

33 minutes ago, swansont said:

There are regions that get below 90K

https://www.nasa.gov/image-feature/jpl/pia20020/titan-temperature-lag-maps-animation

Thanks for the link, if we found liquid oxygen on Titan that would be unexpected to say the least.  With so much methane liquid oxygen wouldn't be stable unless it was being produced by some process faster than it would be consumed or react with the methane and ethane..