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Old 06-13-2016, 07:17 AM #225
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Default Re: Space Discussion Thread

Is there any way we could potentially 'strip away' the atmosphere of venus in the far future? I'm talking about the VERY far future here. Remove most of it and then use the remainder of the co2 for growing plants there. I believe Venus might be a better candidate for terraforming than Mars due to the similar gravity to Earth.


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Old 06-13-2016, 07:55 AM #226
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Default Re: Space Discussion Thread

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Is there any way we could potentially 'strip away' the atmosphere of venus in the far future? I'm talking about the VERY far future here. Remove most of it and then use the remainder of the co2 for growing plants there. I believe Venus might be a better candidate for terraforming than Mars due to the similar gravity to Earth.
I think it might be possible. Venus does have the benefit of a lot of solar energy, so maybe we would have the energy to solidify/liquid a lot of the atmosphere over time or pump it through tubes to be stripped into space.

The issue is that Venus also doesn't have a strong magnetosphere, so the thick atmosphere might be the only good radiation defense.
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Old 06-13-2016, 04:23 PM #227
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Default Re: Space Discussion Thread

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The issue is that Venus also doesn't have a strong magnetosphere, so the thick atmosphere might be the only good radiation defense.
Could create a magnetic field artificially too.
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Old 06-13-2016, 08:21 PM #228
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Default Re: Space Discussion Thread

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Could create a magnetic field artificially too.
Yes, but at what cost? Could that be done realistically?
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Old 06-13-2016, 08:35 PM #229
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Default Re: Space Discussion Thread

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Originally Posted by InfinitusEquitas View Post
Could create a magnetic field artificially too.
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Yes, but at what cost? Could that be done realistically?
We may need to do that for earth one day. It seems like it would be too large of a project unless our survival depended on it. I can imagine a large number of nuclear powered electromagnets the size of a large building all over the planet including platforms in the oceans.

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Old 06-13-2016, 08:37 PM #230
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Default Re: Space Discussion Thread

At present I don't think so, but the main problem with it would be with supplying power.

I really hope that we'll find a new power source, that will make our current energy needs appear minuscule.
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Old 06-13-2016, 09:51 PM #231
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Default Re: Space Discussion Thread

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Originally Posted by InfinitusEquitas View Post
At present I don't think so, but the main problem with it would be with supplying power.

I really hope that we'll find a new power source, that will make our current energy needs appear minuscule.
There are big material and engineering issues as well. A big magnet that could create a magnetosphere is really going to have to be physically large. It might even need to be made out of a massive superconductor to keep it from having to be planet-sized.
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Old 06-13-2016, 10:00 PM #232
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Default Re: Space Discussion Thread

That's true, but I think the main road block to that kind of construction would be in actually powering such an electromagnet. The core of the planet is also likely to be metallic so it maybe the objective would be to slowly force it to spin somehow, although that raises a ton of other issues, tectonic plate shifts for example.

Material science has moved forward very very significantly over the past few decades, and hopefully will move on even more.
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Old 06-13-2016, 10:18 PM #233
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Default Re: Space Discussion Thread

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Originally Posted by InfinitusEquitas View Post
That's true, but I think the main road block to that kind of construction would be in actually powering such an electromagnet. The core of the planet is also likely to be metallic so it maybe the objective would be to slowly force it to spin somehow, although that raises a ton of other issues, tectonic plate shifts for example.

Material science has moved forward very very significantly over the past few decades, and hopefully will move on even more.
I don't think the power would be too big of an issue, especially using superconductors. The energy requirement would be huge to establish the field, but that'd be it for the most part. I'd assume it's somewhat feasible right now. A copper electromagnet would take temeendous amounts of energy since it would be at least be hundreds of thousands of miles of resistance.

While our material science improvements are doing pretty well, I think we'd need a massive superconductor that can be maintained at reasonable conditions. The issue is getting enough flux density to pass high energy particles at a reasonable altitude. The only ways to do this are to have a magnet that can account for a significant amount of the planet's radius or a magnet that's still pretty big and has a massive amount of energy.

Might be possible to turn the core into a permanent magnet if we get to the point where we can induce spin though.
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Old 06-13-2016, 10:40 PM #234
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Default Re: Space Discussion Thread

I think it would be stupid and irresponsible to screw around with the core of the planet if we even could. I think it could end in disaster.

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Old 06-14-2016, 01:26 AM #235
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Default Re: Space Discussion Thread

Don't go messing about with it when there is no problem

But if there is a need to create a magnetic field, i wonder how much current it would actually take to create something like earths magnetic field using a loop of superconducting wire around the equator.

With current superconductors this would not be very practical due to cooling requirements, but if/when room teperature super conductors become available it all sounds a lot more feasible.

Such a system would require very little or no input power once energized depending on the type of superconductor and imperfections in the material.
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Old 06-14-2016, 05:45 PM #236
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Default Re: Space Discussion Thread

Anyone see how our species is going & how corrupt this world is?

Yeah, we aren't going anywhere until people in power decide to get their priorities straight & not focus on oil and bombing others!

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Old 06-14-2016, 06:25 PM #237
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Default Re: Space Discussion Thread

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Anyone see how our species is going & how corrupt this world is?

Yeah, we aren't going anywhere until people in power decide to get their priorities straight & not focus on oil and bombing others!

-Alex
Yes I noticed, and I don't see it getting better anytime soon. I had hoped that the next generations would live in a good and peaceful world with Star Trek level technology were everyone's needs can be taken care of, but it is not to be. I now expect another world war and I think it will go on until all of civilization is completely undone and desolate. Survivors will be living in a post war wasteland where people will kill each other over water or scraps of food. In time a new and better civilization will rise from the ashes of this hell.



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Old 06-14-2016, 07:28 PM #238
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Default Re: Space Discussion Thread

I think our society/world will limp along without WW3, and a general SLOW progression to a better world for most, assuming there is no major cataclysmic event.

Despite all the gloom and doom that one gets from watching or reading the news, the world as a whole, is a MUCH safer, better, place than it was 5000, 1000, 500, 100, and even 50 or 20 years ago.

Literacy rates are up, despite a ton of regional low level conflicts, large scale conflicts are down. Quality of life, on average, is way up. Technological progress is also accelerating at a faster and faster pace.

Yeah, the world is a shitty shitty place, but cheer up guys, it's less shitty then it's ever been.
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Old 06-15-2016, 01:28 AM #239
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Default Re: Space Discussion Thread

The world has certainly gotten safer over the centuries, though i'm not really sure that trend is still there during the last 20 years or so. I think the end of the cold war sort of is the end of the point where things have gotten safer. Since then we had plenty of problems with terrorism, in the west to a degree not seen before.

In some respects safety can be problematic though, as it makes overpopulation that more easy. In general you would say that lower infant mortality is a good thing, but for countries that still suffer out of control growth it might not be. Resources are finite and not evenly distributed after all.
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Old 06-15-2016, 03:21 AM #240
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Default Re: Space Discussion Thread

The proliferation of information has had a very dramatic effect on the world over the past 30 years actually. While censorship is still very prevalent throughout much of the world, it's not nearly as pronounced as it was. People in general, who want information, can pursue it, and get it. Knowledge that used to be highly restricted is now out there for literally anyone willing to look.

30 years ago if you wanted to deal with someone in say China, or Japan, from New York, or at similar distances, you had to either go there, or have an expensive conversation on the phone. Now? We can easily setup a video conference, without all that much effort. On a simpler level, even crappy smartphones are allowing people to stay in touch continents apart.

That increased level of communication makes it MUCH harder to force people to swallow the same BS ideologies that allowed the cold war to take place to begin with.

So even over the past 30 years, things have gotten better. Over the past 10... I'm not so sure.
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