Comments by "Tony Wilson" (@tonywilson4713) on "BBC News"
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@AmericatheBeautiful-p4z I'd try and explain the reasons why people like you are so ignorant and wrong and stupid but its not worth it. But for anyone else interested here's some basic engineering and a bit of math.
There's an oddish subject in aerospace I call planetary mechanics. I was introduced to it by a NASA engineer who visited our university one day. He'd done a project on what it would take to terraform Mars. He explained you just start with something basic like how much air do you need and what would you need to heat it up to a reasonable temperature considering Mars is cold. -60C on Mars is a warm day.
Planetary mechanics is just the basic mechanics of what's needed (nuts and bolts). Its not the complex gas & water cycles that change and shift with seasons or the effects of the planets rotation and inclination or any of the other time related things. I call that stuff planetary dynamics as it involves things that move and change and cycle with time.
To keep the math practical and get a basic estimate of what the task is, we do an approximation. I use the idea of a 1km think layer of breathable air because it makes the math understandable. I approximate the volume but just covering the planet in 1km cubes of air. Yes there's gaps between the cubes but its just an approximation and its within 1%. I also ignore things like gravity, solar wind, etc, BECAUSE I am just trying to demonstrate the size of the task.
The surface of Mars is 144,000,000 km. That equates to 144,000,000 x 1000 x 1000 x 1000 cubic meters of air and at 1.2kg for a cubic meter of air, that's 172,800,000,000,000,000 kilograms of air.
To raise that much air from -60 to +20 ℃ engineers use the basic equation: E = Cp x M x ΔT
Energy Required (kilojoules) = 1.006 kJ/kg.C x mass of air in kg x temperature difference in ℃
We then get 13,906,944,000,000,000,000,000 Joules of energy required.
So how much energy is that?
It's the equivalent of 220,745,143 Hiroshima bombs which had 63 Terajoules of energy.
Its also equivalent to about 64,683 Tzar Bombs the largest nuclear weapon ever detonated.
Lets not forget we still need to find or create that 172,800,000,000,000,000 kilograms of air and work out how to keep it attached to Mars because Mars only has 1/3rd of Earths gravity. Then there's the task of making the gas and water cycles work.
This is why aerospace engineers don't talk about this stuff much because once you realise the basic scope of terraforming the numbers get so massive so quickly the scope confuses people.
Half the problem is the idiocy of Hollywood. Remember the film Aliens? The one with the giant nuclear reactor that would convert the asteroid into a liveable planet in about 20 years. BULLSH1T If they had a few 1000 of those reactors running for a couple of centuries they might start to make a difference.
Simple rule if it involves Hollywood and technology its 99.9% scientifically FALSE, WRONG or plain BULLSH1T. Don't get me wrong I still love sci-fi, its just I know what's fiction and what's NOT.
If you have time and do want to learn about energy systems then I recommend the Illinois Energyprof channel here on YouTube. I can't say its exciting but it is informative.
Disclaimer: I did my degree at U. Illinois, but have never met David Ruzic. I graduated before his time there.
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