[Moontanman]

sigurdV, on 10 February 2012 - 12:19 PM, said:

Ahem... Moontanmans version was the torus shaped space colony I think it was I who introduced the spherical space cities...At least in here.(Check out the thread Space colonization: How When Why?)

Trust me when I say you are not the first to come up with these concpets.

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The colonisation of Venus has problems because of its hot ground!

Changing that would be part of terra forming Venus..

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The athmosphere seems the best entry. It contains C and sulphur i recall , its thick we could live on gliders or balloons there while pondering the next step. Can we feed ourselves from the athmosphere? Exporting coal and sulphur?

Give this some thought, and if the flaws in these ideas don't jump out at you let me know and I'll get back to you. I will give you some hints.. gravity well, coal?

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The possibilites of life on venus are slim, the athmosphere is as you point out the best chance, but the question of extremophiles surviving underground depends on how hot it is a bit down...
I dont think we know yet.

The possibilities of earth like life on Venus is slim.

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If we can feed us, and if the athmospere contains exportable matter, then Venus could be a profitable affair...All we need is a Space Elevator from empty space to the upper layers of the athmosphere and since we could extract oxygen from the CO then our exports are approximately free of cost. Well need hydrogen as well. I think there
is a problem there...Must it be imported? From where? The Oorth cloud?

Again a clue for you

Gravity well...

[sigurdV]

MacPhee, on 09 February 2012 - 01:59 PM, said:

Thanks Moontanman. Yes, I see what you mean. This reminds me of the old arguments about starships. Suppose we could build a starship, but it hadn't got FTL speed. So it would take hundreds of years, or thousands, to arrive at its destination star. During that time, many generations would be born, grow old and die, aboard the ship. They would be forced to spend their entire lives cooped up in the ship, through no choice of their own. Would it be ethical for us to launch such a ship? I'd say definitely "no".

Setting up a colony on another planet, though, isn't quite the same. I take your point about the impracticability of removing the entire population of the colony planet, as doom-time became imminent. But that assumes we left it right till the last minute. Couldn't we have a kind of "phased withdrawal" from the planet, so the inhabitants could leave over a period of time.

Your question of where to draw the line, when deciding whether to colonize a planet with a limited habitability period, is interesting. If the planet was only going to last a very short time, say 100 years, then it obviously wouldn't be worthwhile.

On the other hand, 1,000,000 years, is (in human terms!) like an eternity, so I'd go for that as the benchmark.
We only colonise "million-year planets". Sounds reasonable?

Thanks again for the courtesy of your reply.

So I decided that only a Space City would do!
And I think Space Cities is how we solve the colonisation of the Solar System! And the next Solar Systems...

I was discussing Venus:Begin by parking a Space City in orbit...

[Moontanman]

sigurdV, on 10 February 2012 - 01:07 PM, said:

So I decided that only a Space City would do!
And I think Space Cities is how we solve the colonisation of the Solar System! And the next Solar Systems...

I was discussing Venus:Begin by parking a Space City in orbit...

Well then, i am glad someone has finally made the decision...

[sigurdV]

Until Moontanman accepts a merger I will now Only discuss Ethics:

And I think its our Duty to defend our Species from invading Space Cities,

or Armadas of Space Cities or whatever Threats there may be!

Do I think its urgent,are we in danger of attack at the moment?

No, but we must be able to do our Duty! And we are not!

We cant defend ourselves from the Earth and that,I think,

is a good reason to colonize the Solar System.

We dont need warriors now, we need merchants!

[sigurdV]

Moontanman, on 10 February 2012 - 01:17 PM, said:

Well then, i am glad someone has finally made the decision...

Well thanx, but I had some inspiration and support